THE RIBOFLAVIN AND NITROGEN METABOLISM OF SIX WOMEN WITH ACTIVE TUBERCULOSIS By Wilma D. Brewer A THESIS Submitted to the School of Graduate Studies of Michigan State College of Agriculture and Applied Science in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Department of Foods and Nutrition Year 1949 ProQuest Number: 10008267 All rights reserved INFO RM ATIO N TO ALL USERS The quality o f this reproduction is dependent upon the quality of the copy subm itted. In the unlikely event that the author did not send a com plete m anuscript and there are m issing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. uest ProQ uest 10008267 Published by ProQ uest LLC (2016). C opyright of the Dissertation is held by the Author. All rights reserved. This w ork is protected against unauthorized copying under Title 17, United States Code M icroform Edition © ProQ uest LLC. ProQ uest LLC. 789 East Eisenhow er Parkway P.O. Box 1346 Ann Arbor, Ml 4 8 1 0 6 - 1346 TABLE OF COMMENTS Page INTRODUCTION....................................................... 1 REVIEW OF LITERATURE............................................... 5 Riboflavin metabolism of w o m e n * ......... • • • • • • • • • • 5 Nitrogen and riboflavin interrelationships* • • • • * • • • • 1 2 Protein requirements of women...............• • • • • • • • • 1 5 Nutrition in tuberculosis • • * • • • • • • • • • • • • • • • 2 0 EXPERIMENTAL PROCEDURE............................................ 27 Subjects* • • • • • • • • • • • • • Experimental plan • • • • • • • • ............ ............ Collection and treatment of samples • • • • • • 2 7 • • • • • • • 2 7 .......... .28 Nitrogen losses through sputum discharge. • • • • • • • • • • 5 1 Estimation of the urinary excretion of a test dose of vitamins. • • • • • • • • • • • • • • • • • • .............. 51 Chemical methods* • • • • • • • • • • • • • • • • • • • • • • 5 2 RESULTS AND DISCUSSION............................................ 34 Description of subjects • • • • • • • • • • • • • • • • • • • 3 4 Nitrogen metabolism of tuberculous women. • • • • • • • • • • 4 1 Estimated nitrogen requirement of tuberculous w o m e n ..........52 Riboflavin metabolism of tuberculous women. * • • • • . . . • 5 2 Interrelationship of nitrogen ahd riboflavin metabolism • • . 63 Estimated riboflavin requirement of tuberculous women • • . • 68 Nutritive value of sanatorium diet. ......................69 SOMMAHT AND CONCLUSIONS.......................................... 71 ACKNOWLEDGMENTS.................................................. 73 REFERENCES CITED 74 Page A P P E N D I X .................................................... Patient Summaries* . . . . . . . .......... 81 . . . . . . . . . 81 T A B L E S ................................................. .. 1. The average urinary nitrogen excretion of 18 women with active tuberculosis; values grouped according to calculated nitrogenintakes........................... 4 2. The urinary excretion of women at different riboflavin intakes.................................................... 8 3. Description ofsubjects • 35 4. The erythrocyte count and hemoglobin of the blood of six women with active tuberculosis. 37 5. Creatinine excretions of six women with active tuberculosis on different intakes of nitrogen and riboflavin............ 38 6. Urinary ascorbic acid excretion of six women with active . . . . . . . . tuberculosis. • ........ • 40 7. The average retentions of nitrogen by six women with active tuberculosis. ............................................. 42 8. Menstrual losses of nitrogen by six women with active tuberculosis • ........ • • • • • • • • • • .......... • 9. Application of analysis of variance to nitrogen retention data. • • • • • • ................ . . . . . . . 44 45 10. The average intakes and excretions of riboflavin by six women with active tuberculosis............ 53 11. Comparison of two procedures for calculation of percent urinary excretion of test dose of riboflavin............. 62 12* Daily intakes and excretions of riboflavin by five college women on a controlled diet with restricted nitrogen intake. 64 13. Analysis of covariance of nitrogen retention and urinary excretions of riboflavin; values for six tuberculous women .................................... 65 14. Analysis of covariance of nitrogen retentions and urinary excretion of riboflavin following a test dose; values for six tuberculous women . . . . . . . . . . . . . 66 15. The average nutritive value of diets of six women with active tuberculosis.................. 70 i. Variations in temperatures of six women with active tuberculosis........................... . ................. ii. Record of streptomycin administration . . . 90 •• 91 iii. Records of sputum tests for six tuberculous women • • • • • 92 iv. The intake and retention of nitrogen by six women with active tuberculosis; individual data. 93 v. The intake and retention of nitrogen by six women with active tuberculosis; individual data; periods one and two • 95 vi. The intake and retention of nitrogen by six women with active tuberculosis; individual data; periods three and four. ............ 96 vii. The intake and excretion of riboflavin by six women with active tuberculosis; individual data; preliminary period. • 97 viii. The intake and excretion of riboflavin by six women with active tuberculosis; individual data; periods one and two . 98 ix. The intake and excretion of riboflavin by six women with active tuberculosis; individual data; periods three and four. . . . . .•.99 FIGURES........................................................... 1. The urinary excretion following a test dose of riboflavin by patients with active tuberculosis and by college women • 3 2. Regression of nitrogen balance upon intake expressed as gm • per kilogram of body w e i g h t .......... 47 3. Regression of nitrogen balance upon intake expressed as gm. per square meter of body surface.................. 48 4. Distribution of nitrogen retention data by McKay (1942) for tuberculous women about regression line predicted .............. from values for healthy women 50 5. Regression of urinary riboflavin excretion upon riboflavin intake expressed as mg. per kilogram of body weight . . . . 55 6. Regression of urinary riboflavin excretion upon riboflavin intake expressed as mg. per 1000 calories • • • • • • • . . 56 7. Regression of values for riboflavin intake and urinary excretion of riboflavin by tuberculous women about regression lines predicted by Brewer (1946) from values for healthy women. • • • • • ........................... ...58 THE RIBOFLAVIN AND NITROGEN METABOLISM OF SIX WOMEN WITH ACTIVE TUBERCULOSIS Good nutrition has been considered an important aid in the treatment of tuberculosis. Since there have been few studies of the quantitative requirements of the disease, emphasis has been directed toward the qualitative aspects of nutrition. Consequently there have been wide differences in the dietary practices of sanatoria (Sedgwick, 1946) and in the recommended allowances for tuberculous patients (Pottenger, 1946; Baird, 1945). The Foods and Nutrition department at Michigan State College was asked in 1945 for recommendations for food subsidies for persons with arrested tuberculosis. Since there was inadequate information concerning nutritive requirements in tuberculosis, a survey of food habits was conducted among women with active and arrested tuberculosis at the Ingham county sanatorium. The survey techniques used were similar to those which had been used in previous investigations with apparently healthy women so that data for women free from the disease were available for comparison with data for the tuberculous series. Results of the dietary survey have been reported (Brewer, 1949). One phase of the survey consisted of measurements of the riboflavin, thiamine and ascorbic acid content of the urine of patients for three days preceding and one day following a test dose which contained three mg. riboflavin, three mg. thiamine and 400 mg. -2 - ascorbic acid. Tests were carried out among patients who previously had received vitamins in addition to their usual diet and also among those who had had no dietary supplements. A histogram which gives the percentage excretion of a test dose of three mg. of riboflavin by the tuberculous women and by college women under similar test conditions is shown inBigure 1. These data indicated that the ribo­ flavin excretion of tuberculous women following a test dose of the vitamin exceeded that for healthy women on their usual, self-selected diet. The test dose excretions also were higher than those for college women receiving controlled intakes of 2.73 mg. riboflavin. These values suggested the possibility of disturbed riboflavin metabolism in tuberculosis and it was felt that there was need for further study of the riboflavin nutrition of tuberculous patients under controlled conditions. The excretion of urinary nitrogen also was studied for the patients sampled during the survey; these values have been grouped according to calculated nitrogen intakes in Table 1. If a relatively constant value for fecal nitrogen is assumed, apparent storage of nitrogen occurred at the higher nitrogen intakes. Since dietary protein has been considered an important factor in the treatment of tuberculosis and since an interrelationship of nitrogen and riboflavin metabolism has been reported (Oldham, 1946), it was planned to investigate simultaneously the nitrogen and riboflavin metabolism of tuberculous women. 2 $ t- 5 III *^' s. <0 -J * O ^ C o t 'D c *■ * - > Q) Q j v: < b So R « * u * CT, O > 'J'Q O qJ O S X i O ■) 'o b O s 1 ^ s^ (b <0 0 ?> 03 Xs Q ) So 2!> fc* £ o §* <0 I / ) Q J s- QJ \ \ 0 S s .0 0 Q §- O k O 0> (D ■S'^'S k ^ R £ o § & 0 4 c "> ~ £ So ^ o c ‘5 i ® o U u 5^ \-Q 14 QQ §- £ £ ^ & c-S'o o b s 1<£ to Q» o g> k § •S> k o k r~ O V> T" o —r O «J T" Q O •at//v/7 Uf & S O Q jS-«5> / ~ * r O Q0 —r~ i O O to * p ^ }< 5 > ^ O X Z J & yv £* J ° CD rvj U //\D /jO q /tf t-u & o u & c / 5: a -4 - TAELE 1 The average urinary nitrogen excretion of 18 women with active tuberculosis; values grouped according to calculated nitrogen intakes Nitrogen Intake* Number of Subjects Urinary Nitrogen Gms./24 hours 5.0 - 9.99 Gms./24 hours 5 6.795 (5.234 - 9.853) 10.0 - 14.99 9 8*353 (6.662 - 10.575) 15.0 and up 4 8.782 (6.728 - 11.168) * Nitrogen Intake ^ Protein, gm. (by calculation) 6.25 REVIEW OF LITERATURE Riboflavin metabolism of women. The urinary excretion of riboflavin is directly related to the dietary intake of the vitamin. This relationship may be seen from Table 2 which gives the mean urinary excretions of riboflavin reported by various investigators for women at different riboflavin intakes* From studies of riboflavin intake and excretion, recommenda­ tions have been made for human riboflavin requirements. Earliest of these studies was the investigation of Sebrell (1941) of the ribo­ flavin metabolism of 10 women on a basal diet containing 0.5 mg. riboflavin per 2400 calories. Symptoms of ariboflavinosis which responded to riboflavin therapy were observed for six of the 10 subjects after 89 to 232 days on the basal diet. The average urinary excretion on this diet was 77 micrograms and it was found that the excretions increased in a step-like manner when supplements of ribo­ flavin were added to the basal diet. Whereas an intake of 0.05 mg. of riboflavin per kilogram exceeded the requirement of the adult women, an intake of 0.025 mg. per kilogram was insufficient. Sebrell evaluated the requirement for adult women at three mg. per day. Studies reported by Strong (1941) supported this recommendation. Williams (1943) found no evidence of clinical deficiencies at intakes of 0.7 mg. per day although depletion of tissue stores of riboflavin occurred. The subjects of this study had received large amounts of riboflavin prior to the investigation. Williams estimated the riboflavin requirement of women to be 0.5 mg. per 1000 calories 6- 1 by women (D Pt M P3 of riboflavin p 0 •H 0 p 0 *H 0 0 0 r— 1 i— 1 o d p d o o ••t d 0 0 0 1 — 1 1 — 1 o d P d o o 0 0 1 — 1 rH O d p d o o 0 rH 0 O d 4^> d o o •** d •*» d • •* d 8 g 3 p § £ d 0 6D 0 rH i— 1 O O © 03 excretion The urinary P 0 •rl 0 d ^ _© 03 o 0• o 1 0 a o £ 0 60 0 rH i— 1 O o 0 £ 0 6f) 0 © 60 © i— i d r-H o O o o rH H •* •0 0 i— t rH O d p d o 0 •*» p d 0 0 >H € *3 s £ 0 ♦pH 0 +s 60 0 0 .d rH P rH d O o 0 0 p 0 •H 0 p 0 ♦rl 0 *0 0 rH rH O d p d o 0 0 ■ — 1 0 O d P d o 0 0 0 0 o d P d o 0 0 • d 0 P ^ 0 O -rl £ 0 ••* d © £ o £ • d 3 o £ 0 0 0 0 O d p d o o *0% d 2 a p £ 0 © © d 0 ■ — 1 0 0 0 rH 3 i—1 P O 0 o d i CO 03 o 03 • o O d p 0 i . d 0 60 o o 5* o 1 £> 0. o 0 d 0 1 5>> O p cd 0 Q O m p

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P d P h © P p •H © Ph CM O GO CM IN • • O HI 4-1 | LO rH rH LO « • i—1 O CM CM LO o i—1 cn co CO CM to • • rH ° 1 4-1 to IN H LO * • rH ° J- 01 i-H CM CM • • o to +1 1 LO rH 01 O • • i—1 i—1 O CO •tf LO • • o CM 4*1 1 CO IN -sf* I-H • • rH O LO to CM LO • • o CO o Ph © P © © O © d P U & l f. d a1 w © t» P hd © O Pi *© u to • • o D-1-1 1 to CM to to • • to LO « • O LO 4-1 1 o rH LO O • • LO LO LO i—1 CM on • • O LO 1 +1 IN • to • LO H-l 1 O 01 • • CO to LO CM • o o ai m i 4-1 o to O • • o co © M d © ph © 4-1 I O IN 01 LO • * CO IN — " M >> © O d •H Ph p © p fc > >© d srH © d Ph •rH P © Q .9 d d rH w © P Ph Ph 01 o 'tf • O +1 LO 00 • 00 i— 1 1 LO LO • to •o o o C O rH C M • bb CO o O • o 4*1 to CM • o to CM • o t o CM • o h " Ol to LO • • tP O rH 4-1 1 O CO 3* • • to o 1— 1 1— I o M H d •rH •rH € d • rH £2 <*H bb o o o •H H o P to H d d CO — O CO O rH * • o o -41 1 LO CM rH i— 1 • • O O > m co ' O to O CM • • o o 4- i i ^ o CM CM • • o o 00 CO to • • LO o i— ! 4-i 1 CM IN to CM • • to CM H H rH M rH tJ 9 • rH •d d •rl t> • d £} i— ! bb < h h o o C M r— 1 o r© o •rH C M P h rH tj o ** to W bD >* d H I O •i— •rH d Ph d © LO Ni rH d O d •rH •H d d Ph d d © 13 rH O -H •h aJ P h t3 © rH d •H •rH d d P h d d © Ph Ph Ph Ph LO d o of the mean M • p bo j = i ,M bb error d p cl Standard The average retentions of nitrogen by six women with active tuberculosis o __ CO ^ CO • • rH O , +“• to LO to • •o ° ±. -4 3 - The differences in nitrogen intakes for periods one and two were not statistically significant (,t* test, Fisher, 1938); neither were the differences between the nitrogen intakes of periods three and four significant. The menstrual losses of nitrogen by the subjects were not calculated with the total output but are summarized in Table 8. The average daily losses ranged from 0.015 to 0.065 gm. nitrogen. The nitrogen retention data expressed as gm. per 24 hours were treated by analysis of variance. in Table 9. A summary of the analysis is given Of the total 23 degrees of freedom which were available, there were three degrees of freedom for differences between means of periods, four degrees of freedom for individual differences and 15 degrees for the interaction (error term) of periods and individuals. Differences between the means of periods were significant ( 0.05). The three degrees of freedom for period differences were further divided with one degree of freedom for a comparison of periods one and three against periods two and four, and one degree of freedom for a comparison of periods one and two against periods three and four. There was not a significant difference in nitrogen retention when periods one and three were compared with periods two and four. This was essentially a com­ parison on constant nitrogen intake of nitrogen retention at moderate riboflavin intakes with nitrogen retentions at high riboflavin intakes. Since the differences were not significant, it can be assumed that for these experimental conditions, variations in riboflavin intake did not influence the retention of nitrogen. Therefore the nitrogen metabolism $ 03 03 CO to 03 O o to IS 00 03 LO cn «o o IS cr> * LO is to o cr> I— I LO 0.056 tuberculosis « £ active •p 0 to O 1 03 CS 03 0.015 with 03 C- rH O o to cs 00 00 lO o to to 03 Menstrual to o to to o ■g Fh 03 0.065 -4 4 - I -4 5 - TABLE 9 Analysis of variance of nitrogen retention data Predicted F Source of variation value obtained F 0.05 F 0.01 Between means of periods 3.65 3.29 5.42 Comparison of periods 1, 3 vs 2,4 3.00 4.54 8.68 Comparison of periods 1, 2 vs 3, 4 7.92 4.54 8.68 -4 6 - data may be considered independently of period differences in ribo- , flavin intake. The nitrogen intakes for the various periods also are expressed in Table 7 as gm. per kg. of body weight and as gm. per square meter of body surface. Nitrogen retentions expressed as gm. per 24 hours have been plotted against nitrogen intake expressed as gm. per kg. of body weight in the scatter diagram shown in Figure 2. A regression line was drawn for these points from the predicting equation calculated according to the equation, Y= a^bx. The intercept of the line at equilibrium occurred at an intake of 0.11 gm. per kg. of body weight. The average body weight of the subjects was 57.5 kg.; therefore the average requirement for equilibrium by these subjects would be 39.5 gm. of protein daily. For a 56 kg. woman, this corresponds to an intake of 38.5 gm. of protein. The surface area for each individual was calculated according to the formula of DuBois (1924): Log surface area ^ (Log weight Ckg.] x 0 . 4 2 5 ) (Log height [cmi] x 0.725)+ 1.8564 This equation was developed from a limited number of experimental observations and therefore its validity can be readily criticized. However it does express a weight-height relationship and it has been " widely used as an expression of total surface area. In Figure 3, the nitrogen retentions expressed as gm. per 24 hours have been plotted against nitrogen intakes expressed as gm. per square meter. An intake of 4.16 gm. per square meter would be predicted from these data for nitrogen equilibrium. Since the average body surface area for the six patients was 1.62 square meters, this would be equiva- 0 * ® n 0 ■9 0 •Q 5 0 So . £ v. < 0/ 0)/n Q) 0 V. % D ± * *+j c 'b x Q/ o V to 0 0 <0 <5 i. ^ C £ o •° V 5 o* £ ? d) 0) § r *'■* th D>t3 g) (1) tw < o:-Si 6) 3.0i £ p g -/ac/ && uo/ u &B oj j. i/\/ Qi 0 c: •>v Q) C> 0 o K 2: Qj 5 ** ft O •0 § * ^ Q. |a ; 5 0. i . Q> <0 0 5 to ^ 4! « o | I to £ \ * *> Ht QC Q) ^ £ S '- / / / o o o <"J 'Vi ujc) _ '»• p-c' s e d O „ Q r uoj+ua].ay u&3ojjf/y k *9 *o * r? >-► <0 9 * CVJ Q; P> ^ Q <) c\j . . O o o o o* o rH CO -H CO O CQ • • o o tO © a o •H E) •P *H © |> a a O CQ © ra Q a o •P Pi 03 03 o rH © © EH CEJ t> a fa 02 02 CD O i—1 . . o O 4- 1 I to in 0 2 CO pH o . . o o > a © pa a • »a -p © •H O «H tQ -H a rH © *H pa i CO CO o CO o to +1 I iH i — i * 02« to to CD CD O CO O 02 4-1 i O CO to 02 • • 02 02 O O 02 CO a © a ,a pa t 7.79±0.05 (7.56 - 7.93) 03 a s-i o Qi tj * ? c flj^ * Ci ^ * Q> ^ CJ ^ *0 n ^O IT) > °9 c\j -v : -pg Jad £w-ui/\o/j.oqi£j jo uo/ f &j yxj A'joutjp J ! 0) C k * C* 0 S ^ i. . N iw '*«' —N <0 Q> x. <0 > ^ 5 **. Q U 0^ >< k k S -6 0 - excretion of a three mg. test dose was 31 percent with a range of 27 to 38; for a dietary intake of 2.73 mg., the percent excretion of four women was 56 with a range of 51 to 60. Thus values for tuber­ culous subjects in periods one and three were similar to those for healthy women who had been receiving slightly higher riboflavin intakes. The values given in Table 10 for percent urinary excretion of riboflavin following a three mg. test dose were calculated according to the equation: % test dose = Excretion after test dose (24 hr.) (Riboflavin in dietH-3 mg.) X -r 100 This represents the relationship of the excretion of riboflavin in the urine following the test dose to the total riboflavin intake for the day. This procedure for calculating the test dose response was used for riboflavin studies with college women in this laboratory. Therefore the two series were comparable. Another procedure for calculation of percent excretion of the test dose is based upon the increment in urinary excretion which occurs following a test dose of riboflavin and is calculated according to the equation: fo test dose = Excretion after test dose (24 hr.) - basal excretion (Avg. for 24 hr.) ■— 3 mg. X 100 This method of calculation has been used in this laboratory for survey studies which did not include food collections and analyses. This method of calculation also has been used by Melnick (1945) in -6 1 - vitamin bioassay procedures. In Melnick’s study, a basal diet was fed previous to administration of the test dose so that basal urinary excretions were constant preceding the test dose. In the present study, the variations of basal urinary excretion of riboflavin were greater among subjects in periods of high riboflavin intake than for periods of moderate riboflavin intake. A comparison of values calculated by the two methods is given in Table 11. In each case the standard error is higher when the calcu­ lation is based upon the increment in excretion than when the calcu­ lation is based upon the total day’s intake of riboflavin. variations were obtained for periods three and four. The widest The magnitude of the values calculated by the two methods is of the same degree and the two methods apparently would yield similar information. The fecal excretion of riboflavin was relatively constant for five of the six subjects within each period. observed for subject EftT. Wide variations were The average fecal excretions were higher for periods of increased milk intake than at restricted milk intakes. For periods one and two, the average fecal excretion was 0.68 mg. and for periods three and four, the average excretion was 0.85 mg. per 24 hours. These data do not indicate the source of the extra fecal riboflavin for periods three and four. The hypothesis that greater intestinal synthesis occurred during the periods of increased milk intake seems acceptable in view of various reports in the literature. Moreover the increase in excretion for the last two periods apparently was unrelated to riboflavin intake since the riboflavin supplements were given during periods two and four. Since the fecal riboflavin values were related to the character of -6 2 - IN CM O rft CM• CM CS ■g O O H d 0 Ph w CO lO O CM n 0 0 o lO CO • CO cO 04 d o •H ft 0 d d •e 8 0 CM cd s •rH ft H ft O .O to O iH cd o ft o o 0 o 8 ft CQ 0 0 *0 0 O O d ft o ^ in \}l tO C0 IQ »d o cd d •rH ft 0 d 0 CO 8S18g CO ta CM• CO in d o rQ ra CM O Hi in CM CM C- t> cf O CO Id CM o CO in CO nd nd ft ft 0 0 •rH d 0 o d ft ft 0 Ph 0 • H CM d o •rH ft 0 d 8 pq d 0 o d CM a CM CO O cO CM O ^ CO CO CM CO ^ CO in 0 0 ft ft o d 0 0 d o •rH ft 0 8 8 *1 H 0 0 0 O •d O ft ft d 0 CO ccJ 0 ft O Ph H O H cr cf! ^ 0 0 ft fot CO cr> CO CM 0 c} 1 in o CO -cH CM nd ft d 0 o TdS ^ o 0 •r-} -9 d co o 0 ft ft 0 0 O *d cr> ft o d d CO CO •rH CO d © i 0 0 I— I O ft to TJ § •rH d * CM CO ft CT> H CT> rH CN ES CO CO CO 0 0 CM 0 t CM d o d CM CO 6 O M Ph d o O O CO £ *r"l d o o 3 ft lO ft ft 5 GO in cm LO ^ CO o o a* CO h ft ^ 0 ft d d CO 0 & ft 0 •rH Q -6 3 - the diet and since urinary riboflavin values were directly related to the dietary intake of riboflavin, it would seem that absorption of synthesized riboflavin did not occur in measurable amounts under conditions of the study. The range of fecal values for these subjects was similar to the range of values obtained for six college women on a diet containing 1.06 mg. riboflavin daily (Table 12)* These women were subjects of nitrogen metabolism research in progress concurrently with this study; the riboflavin metabolism was studied for one five-day balance period to obtain fecal excretion values for comparison with the tuberculous subjects. The range of fecal excretions for the six women was 0.45 to 1.20 mg. per 24 hours. The women were given an adequate diet of mixed foods which supplied approximately 40 gm. of protein daily. The test dose responses for the women were much lower than for the tuber­ culous patients; however the dietary intake also was lower than the intakes studied for tuberculous women. Interrelationship of nitrogen and riboflavin metabolism Metabolic studies with college women reported by Oldham and coworkers (1947) indicated an inverse relationship of nitrogen balance and ribo­ flavin excretion. The data presented here were examined to determine whether this relationship also could be demonstrated in tuberculosis. Analysis of covariance was used to determine the correlation coeffic­ ients for nitrogen retention and riboflavin excretion. A summary of the covariance analysis for nitrogen retention with daily riboflavin excretions is given in Table 13 and the covariance analyses for nitrogen retention with test dose responses is given in Table 14. In either case -6 4 - to o o i—i o by five college women I cd -P cj to o o to in o tO to o- to in in to in to cr> •rH a CD w o fn P nd CD p o •rH Fh P o « •rH d p o CD •r~S P P CO to o to CD Fh o & to 03 nf•* 03 o to P P •H £ p © •rH to nd 3 O o nd CD rH rH tO to to 00 to O Fh P •H P cl O O to 03 o o Fh cd in to 03 tO rH cl o Daily intakes and excretions of riboflavin o PS CD M 03 9% cj cl £ cd r—l * 4s cl P w o “rH Ci P © f> Fh | a i —I M P • H rH • cd o o •rH fd ft; ro cd > •rH cd Fh nd b j Fh Cl L CD O Pi •H g P ♦H • CD Fh W) Fh & m • 1 rH 5 id o pH ■ u m CO a d •rH l> cd i—1 s p cd Fh m nd CD >» P Fh fj CD Fh P h g CD • •rH P Id Fh cd 9 • to p to CD nd P 0 p Fh © O Fh p P H P 0 0 o 0 Fh 0 0 O P h nd • CD to o nd p to o EH -6 5 - § © © © S-1 t*D ■H o oC» o I o I s * o co lO o> 10 © © © © o rH © o U © rO o a © -P *H © © rH *H © <+-1 fH o© •H © © P< Probability, <0.05 TABLE 13 -P © -p •H i * -6 6 - s 'to CO © d © o > rH CO 8 O KO I o> 1 © Ph © o o Fh © p M •H © Cl O Probability,< 0.02 ■§ m nd o Ph * 02 © d ■ —l P © © o P O P © © © © © tjD § © © 02 02 a* d © O Tf O •H Cl © Pi iVh © i—I

- o E'o ­ en tO to to CO to 03 o "p to 00 O to CT> o C*- 03 03 03 O o*- in i> to CO D- 03 ■tP rH 00 to ^p C O to t cd ^p rH $ §1 'P to to in l>- co 0 F h £ P mi o & tP O to to a> cn tp 02 03 to to 03 03 o tO to CO to to to o cl 0 M O u o rH • O •p O G>• in oo• 00 00• CO 00 00 03 cn rH 8 to rH o o• 03 rH to CO CO CO • to rH rH D3 00 • rH *CO 0 •H U a tO o> Cl rH 0 o o *H u 0 Pi •P H in O O CO 03 D- cd <8 I —I O O 03 CO u 0 Ph CO -tp to rH 03 03 •M u 0 Ph CO rH 03 03 O ^ O >i •H r0 cJ M rH 'P <8 03 rH rH *H • 0 to •p a a 0 *H Ph S (Donelson and Leichsenring, 1945) £ a *; 0 0 S Pi By calculation. The average nutritive value of diets of six women with active tuberculosis 02 SOMMAKT AND CONCLUSIONS The riboflavin and nitrogen metabolism of six women with moderately advanced, active pulmonary tuberculosis was studied. The subjects were non-ambulatory patients of the Ingham county sanatorium and the regular hospital diet was served throughout the experiment. Ages of the patients ranged from 25 to 39 years. The riboflavin and nitrogen contents of the diets were varied by adjust­ ment of the milk intake. The milk intake for periods one and two was restricted to 300 gm. daily; for periods three and four, the intake was increased to 1200 gm. milk per day. Daily supplements of five mg* riboflavin were given during periods two and four. Fourteen days of dietary adjustment preceded each seven day balance period during which intakes and excretions of riboflavin were determined. The average nitrogen intake of the subjects on the usual hospital routine was 10.1 gm. per day. When the milk intake was restricted to 300 gm. daily, the nitrogen intake averaged 8.90 gm.; the average nitrogen retention was 1.15 gm. during period one and 0.57 gm. during period two. The nitrogen intake for periods three and four were 13.00 and 13.62 gm. respectively. The mean retentions at these intakes were 1.95 gm. nitrogen for period three and 1.48 gm. nitrogen for period four. The relationship between nitrogen intake and retention for the tuberculous women was similar to that reported for healthy, active college women. The urinary excretion of riboflavin was directly related to the -7 2 - dietary intake. The riboflavin intakes for the four successive experimental periods were 1.35, 6.41, 2.60 and 7.79 mg. daily; the urinary excretion of riboflavin at the corresponding intakes were 0.31, 3.53, 1.08 and 5*62 mg. The percent test dose responses for the four periods were 39, 65, 55 and 72, respectively. The fecal excretion of riboflavin was related to the amount of milk in the diet rather than to the dietary intake of riboflavin. The average excretion for periods one and two was 0.68 mg. and 0.85 mg. for periods three and four. The riboflavin metabolism of the tuberculous patients also was similar to that of healthy college women. The riboflavin content of the diet did not influence the nitrogen retention but there was a significant inverse relationship between the urinary excretion of riboflavin and nitrogen retention. It is estimated that a diet adequate in calorie value and supplying 80 gm. protein and 2.6 mg. riboflavin would meet the require­ ments of these patients for these nutrients. ACKNOWLEDGMENTS The author wishes to express her appreciation to Dr. Margaret A. Ohlson for her guidance, advice and encouragement throughout this study; to Dr. C. J. Stringer who made available the facilities of the Ingham county sanatorium for this research; to the tuberculous patients who followed the experimental routine carefully and conscientiously; to Mrs. Vivian Trapp and Miss Olive Henderson of the staff of the Ingham county sanatorium for cooperation and assistance; and to Dr. Dena Cederquist for the opportunity to analyze the metabolic collections from the study of the nitrogen metabolism of college women. Further acknowledgment is made to Mrs. Helen Tobey, Mrs. Betty Coles, Mrs. Dorothy Dunsing, Miss Violet Katainen, Miss Patricia Wyatt and Miss Janet Traver of the Foods and Nutrition staff; to Mr. Elbert Churchill of the department of Bacteriology; and to Dr. Leo Katz of the Mathematics department. The author also wishes to acknowledge with gratitude the financial assistance provided by the graduate scholarship from the Michigan State College Institute of Nutrition from 1946 to 1948. REFERENCES CITED Allison, J. B« and J*• A. Anderson 1945 The relation between absorbed nitrogeh, nitrogen balance and biological value of proteins in adult dogs. J • Nutrition, vol. 29, p. 413. Association of Official Agricultural Chemists 1940 tentative methods of analysis. 5th ed. Axelrod, A. E . , T. D. Spies and C. A. ELvehjem urinary riboflavin excretion in man. vol. 20, p. 229. Official and 1941 A study of J. Clin. Invest., Baird, J. H. 1945 Some aspects of dietetics in the veterans administration. 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Holt 1941 A riboflavin excretion test as a measure of riboflavin deficiency in man. Bull. Johns Hopkins Hosp., vol. 69, p. 476. Najjar, V . A . , G. A. Johns, G. C. Medairy, G. Fleischmann and L. E. Holt 1944 The biosynthesis of riboflavin in man. J . Am. Med. Assn., vol. 126, p. 357. Ohlson, M . A. W. D. Brewer, D. C. Cederquist, L. Jackson, E. G. Brown and*P. H. Roberts 1948 Studies of the protein requirements of women. J. Am. Diet. Assn., vol. 24, p. 744* -7 9 - Ohlson, M«> A., D. Cederquist, E. G. Donelson, R. M. Leverton, C. K. Lewis, W. A. H imwich and M. S. Reynolds 1944 Hemoglobin concentra­ tions, red cell counts and erythrocyte volumes of college women of the North Central states. Amer. J. Physiol., vol. 142, p. 727. Oldham, H,,, E. Johnston, S. Kleiger and H. Hedderich-Arismendi 1944 A study of the riboflavin and thiamine requirements of children of preschool age. J. Nutrition, vol. 27, p. 435. Oldham, H,>, E. Lounds and T. 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J* Nutrition, vol. 25, p. 361. -8 1 - APPENDIX Patient histories. Subject 3tJi Patient*s discharge summary. Date of Admission: 6-3-46 Date of Discharge: 7-13-48 The patient was admitted to Ingham Sanatorium as a refer from Genesee County. She had been x-rayed in May of 1946 because of an attack of pleurisy and at the time of admission she complained of fatigue of one month’s duration with right chest pain. X-ray examination revealed that in the right lung there were infil­ trations beneath the 2nd anterior rib and extending to within the circle of the 1st rib. In the left lung, there were infiltrations scattered throughout the 2nd anterior intercostal space. She was classified as active moderately advanced pulmonary tuberculosis, II-B. The sputum was positive for tubercle bacilli by culture and guinea pig inoculation and continued to be consistently positive until November 1947. Since that time it has been negative. A right pneumothorax was established 11-11-46 followed by a right closed pneumonolysis on 12-10-46 when one cord and one band-like adhesion suspending the apex were cut. Following the initiation of the pneumothorax the sputum continued to be positive. again on 9-20-47. She was bronchoscoped on 5-6-47 and A normal bronchial tree was found both times except for some reddening of the right stem bronchus and mucoid discharge coming from the right upper lobe. Because of the persistently positive sputum, strepto­ mycin, one gram per day, was begun in January, 1948, and continued for 120 days. Sputum examination six weeks following the initiation of strepto­ mycin ther apy was negative and has been consistently negative since that time. -8 2 - Subject H. Patient’s discharge summary# Date of Admission: 2-12-47 Date of Discharge: 1-21-49 This 24 year old housewife and ex-servicewoman was re-admitted to the sanatorium because of the persistence of positive sputum* She had pre­ viously been treated at this hospital, between the dates of 6-18-46 and 8-4-46, by bed rest and the initiation of a right pneumothorax* At the time of her return after five months absence, x-ray examination revealed that there had been some increase in the infiltrations in the right, upper lobe. She was classified as active moderately advanced pulmonary tuber­ culosis, II-B. The pneumothorax which had been initiated at the time of the first admission had completely re-expanded. The pneumothorax was reinitiated but it was now noted that there were several adhesions suspending the apex of the lung which required a closed intrapleural pneumonolysis done on 3-6-47. Since that time she has been maintained on bed rest and there has been a gradual continued clearing of the infiltrations in the right upper lobe so that at the present time there is very little density remaining. The last examined specimen was a gastric which was negative for tubercle bacilli by culture and guinea pig inoculation. Discharge weight, 129 pounds. over her first admission weight. This represents a gain of 15 pounds During her stay she received strepto­ mycin, one gram per day for 125 days, beginning 1-7-48. -8 3 - Subject G. Patient’s discharge summary. Date of Admission: 12-9-46 Date of Discharge: 11-3-48 This patient was readmitted to the sanatorium because of finding of positive sputum and marked deterioration in her general physical condition. There was no definite x-ray change. She had previously been treated at Ingham Sanatorium between the dates of 4-21-44 and 3-19-46. Following her return to the sanatorium she was placed on bed rest. She immediately began to gain weight. improved. Her general condition rapidly The sputum became negative on concentrate but remained positive on culture and guinea pig inoculation. Following streptomycin therapy the sputum became negative by all methods of investigation and has remained so. There has been no change in the x-ray appearance of this patient’s chest. She has gained approximately 25 pounds in weight. -8 4 - Subject B# Patient’s discharge summary# Date of Admission: 9-19-46 Date of Discharge: 5-18-49 This 33 year old housewife was admitted to the sanatorium as a refer from the Ingham County Health Department# An original diagnosis of pulmonary tuberculosis was made in Morgan Heights Sanatorium in Marquette May, 1933# Originally the disease occupied the left upper pulmonary lobe and was minimal in extent. She entered Pinecrest Sanatorium, Powers, Michigan for treatment in May 1938 where she was on bed rest for six months. She was then treated by left pneumothorax until January 1943 when a pneumothorax was also started on the right side. There had been very little follow up of this case since her discharge from Powers sanatorium in 1943. The sputum was found to be positive in June 1946# On admission here, she complained of only a small amount of expectoration and ease of fatigue. X-ray examination revealed, in the right lung, scattered areas of infiltration extending from the level of the 3rd anterior rib to the apex with a rather well circumscribed area of infiltration at the level of the 4th anterior rib in the middle lung field. On the left, there was considerable retraction of the mediastinal structures to the left and there was a thickened pleura over the outer field. II-B. She was classified as moderately advanced pulmonary tuberculosis, The sputum was positive by culture and guinea pig inoculation of the seven-day pooled sputum material# Over nearly a two year period of bed rest, there was no appreciable change in the x-ray appearance. Bronchographic examination revealed a normal bronchial tree except for lack of filling of the middle lobe which -8 5 - was obstructed* Decortication of the left lung was carried out on 7-6-48 and after a period of two months, right middle lobectomy was done. At the time of operation a tuberculoma approximately three cm. in diameter surrounding the middle lobe bronchus was found. a direct, small communication to the middle lobe bronchus. There was Beginning at this time the patient received streptomycin one gram per day for a period of four months. Since the lobectomy the patient has been negative repeatedly by all methods of investigation. Discharge weight was 137 pounds. pounds over admission weight. This represents a gain of 17 -8 6 - Subject F. Patient’s interval summary* This 35 year old white woman was seen as a referral case on H —29—45 at which time a single 4 x 5 inch projection showed infiltra­ tions in the right 2nd anterior intercostal space and scattered throughout the left lung* She was admitted to the sanatorium January 2, 1946, and her sputum was found to be routinely positive for tubercle bacilli* She gave a history of having had a severe cold the preceding February which became somewhat better in April and May but a cough persisted and shortly thereafter she began to notice fatigue. Physical examination revealed a normal developed, poorly nourished, white woman appearing chronically ill. She weighed 123 pounds and her height was 63 inches. showed: X-ray examination right lung, scattered infiltrations at the level of the 1st, 2nd and 3rd anterior intercostal spaces; left lung, dense infiltrations within the circle of the 1st rib and less dense infiltrations scattered throughout most of the entire lung. The diagnosis and classification was moderately advanced, bilateral pulmonary tuberculosis, II-B. The patient was placed on strict bed rest and because of the wheezing type of respiration and a history of occasional hoarseness, bronchoscopy was done at which time the larynx was found to be normal but the mucous membrane of the trachea was somewhat reddened and edematous. bronchus appeared normal. The right The left bronchus was markedly reddened and edematous and the lumen was so stricted that the bronchoscope could be passed only a short distance into the stem bronchus. 7 A laryngoscopy on -2 - 4 6 showed a fairly marked ulceration of both cords but especially the posterior third of the right cord. Because of the fairly extensive involvement, cauterization of the cords was not indicated and the treatment prescribed was absolute silence. -8 7 - Because of the obliterative pleuritis over the right lung the pneumothorax was abandoned 11-17-47. Beginning May 16, 1947 the patient was placed on two grams of streptomycin daily which was con­ tinued for 85 days. Since her admission to the sanatorium there has been a gradual improvement in the x-ray picture of her disease and the sputum is now positive to culture and guinea pig inoculation only. Her laryngitis is apparently completely healed and the patient’s clinical appearance has much improved. She now weighs 135 pounds constituting a gain of 12 pounds since admission. Because of the continued positive sputum she has once again been placed on streptomycin therapy following a determination of sensitivity to the drug by the organisms. -8 8 - Su.bject DW. Patient’s interval summary. This 24 year old housewife was first seen as a referral case on April 22, 1938. She complained of cough and chest pain for the past six weeks and an occasional hemoptysis for the past three weeks. no knowledge of weight loss. There was Physical examination at that time disclosed scattered rales throughout both lung fields. An x-ray film dated 4-22-38 showed wide spread bilateral pulmonary tuberculosis involving the right lung down to the anterior rib and throughout the left lung with a large cavity beneath the 1st rib on the left. patient was admitted 4—22—38. Admission was advised and the Following admission, a complete evaluation of her case showed far advanced, bilateral cavernous pulmonary tubercu­ losis as above described and it was decided that the treatment of choice was bilateral pneumothorax. The bilateral pneumothoraces were continued in the sanatorium through 4-8-39 at which time the patient left against medical advice. Her pneumothorax refills were continued in the Outpatient Department through July 18, 1941, after which time the patient failed to return to the sanatorium for her usual treatments. During this period there had been gradual improvement in the pulmonary tuberculosis. The patient was not seen again until 10-30-47 at which time she was admitted to the sanatorium following an interpretation of a film. Physical examination at this time showed an undernourished, adult white woman appearing older than her stated age and chronically ill. There was a harsh systolic murmur heard best at the level of the 2nd anterior intercostal space at the sternal border. 60. The blood pressure was systolic 88, diastolic There was a respiratory lag on the right with decreased tactile fremitus and the right chest was dull to percussion posteriorly. Decreased breath sounds were heard over the right chest posteriorly but no rales -89- could be heard at this time. A thoracentesis done 11—10—47 yielded 25 cc. of a very thick purulent material. 200,000 units of penicillin and saline were instilled in the pleural cavity at this time. She was seen at intervals thereafter for aspiration and sterilization of this empyema cavity on the right. Laboratory examination at this time showed the sputum to be positive by culture and guinea pig inoculation. slide examination. The gastric samples were positive on Examination of the pleural fluid did not reveal the presence of organisms. The fecal material was positive for tubercle bacilli on slide examination. An evaluation of the patient’s status indicated that arrest of her tuberculosis would best be produced by decortication and re-expansion of the right lung followed by thoracoplasty over the left upper lobe. The former procedure was done 9-28-48 and a satisfactory expansion of the right lung effected. done. On 11-9-48, the first stage left thoracoplasty was Following this procedure, the patient decided to postpone her second stage until her condition seemed more suitable. Inasmuch as a single stage had failed to close the cavity in the upper lobe of the left lung and the patient being in suitable condition, a second posterior stage completing a six rib thoracoplasty was done 2-8-49. She was placed on streptomycin therapy at the time of the first operation 9-29-48 and this was continued J gram daily for 78 days through 12-15-48. stage. She was again started on streptomycin at the time of the second There has been a gain of 37 pounds over admission weight and her sputum has been negative on two occasions by culture and guinea pig inoculation. -9 0 - +- -** C0# is 9 © © Eh fH ;& &0frt £3j o* & « -© «© •H • -P bQ co • t> © f-i <$ Eh © Pi ra © >» o cd Td cd i—I H< cd rH & 04 04 04 04 04 04 © © © £ nd © H rO •» >* • cd bD tJ 1© <; c- «3j £*• © CM to nd • P tlO CO • |> © U <$ EH • • o • CO 5 -0 ^^ © >4 St u © CO CM 04 04 to o o to + 1 +1 CO• IS D- 04 • • CO CO 04 04 ra S* Td © H< o '19 o H< CM t-l +1 04 o o o o +-| +i • 04 •H • • • • O O to ■H +' oq ^ in cr> • • o • O H< + 1 CO• in 04 active tuberculosis I*? to i—I • s > » • © Mr© > I #% m • P bD © • t> © 14 & © ♦Mean CO • • O O 00 >4 O &D Td • p tsD © • > © Hl fn p O 0 0 +3 rrt 0 EJ *H 0 *Cf P 0 •rl 'Ct t3 0 Ti 0 o 0 a f p 0 p 0 *H •CJ T0J 0 o 0 a t p 0 P 0 nd 0 § I— I •rl pH to t ^F €0 t o O r? •v V O P CO LO 0 0 O to * b. 0 w QO p 0 p o I Record of Streptomycin administration O Ph 0 £ fH 0 T t rH 1 1 KO 02 co o p o p P O o p o p CO 00 ^F IN 1 t IN t tO rH CO 1 1 ^F 1 to o in m to IN rH 02 1 rH 1 t CO 02 1 Comment: rH m CO 8-47 0 (D 4* § I *r4 Of these patients, only F experienced unpleasant reactions to streptomycin, i.e., ringing in ears, dizziness, deafness. 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