40 THE BACTKRIAL FLORA OF RACHITIC STOOLS. 



For this reason, the races in the table have been classified as 

 follows — Bj to Bg, Bac. coli communis; B- to B^j, atypical 

 coli; and B12 to Bj,,, indeterminate. 



Tlie streptococci fell into three groups, called Str.i., ii., and iii., 

 all probably races of the same organism. No.i. is of the salivary 

 type, inasmuch as it ferments (i.e., produces acid from) saccha- 

 rose but not from mannit. No.ii. is Sir. acidi laclici, which, 

 according to Sittlei,* is identical with the Enterococcus .so 

 frequently mentioned by writers upon the flora of infants' stools. 



The following are the analyses of the stools, the numbers of 

 bacteria being expressed in percentages. The notes are by Dr. 

 Storie Dixson (Infants' Hospital) : — 



A. J., aged 12 weeks. Incipient Rickets. 



MacConkey's medium ... Bg, 100 



Endo's medium ... ... B.^, 20; Str. i. and ii., 80 



Acid agar ... ... ... Bg, 95; Micr. candidns, 5 



Alkaline agar ... ... ) „, .. ,,.^ 



® . ) &tr. 11., 100 



Glucose-agar (anaerobic) ... j 



Acidit}' of stool ... ... 1 grm. =0.6 c.c. y^ acid 



Typical bacterium = line, coli communis. 

 Typical streptococcus = Str. ii. 



Notes. — Outpatient, incipient rickets, only came once. 11/8/09. 



H.M., aged 1 year and 8 months. Convalescent from acute 

 Rickets. 



MacConkey's medium ... 1 



Endo's medium ... ... B.^lOO 



Acid agar .. .. ... ) 



Alkaline agar ... ... ) ^i. ••• i aa 



° Stf. Ill, 100 



Glucose-agar (anaerobic) ... ! 



Acidity of stool ... ... 1 gr, n. = 1-5 c.c. j-^ acid (very 



jicid witli strong fjecal .smell) 



*C:entrl. fiir Bakt. Orig. 47. 16. 



