v.] VARIOUS SPECIES OF COMMA-BACILLI. 97 



was not then ascertained. But I have since my return to 

 England ascertained that comma-bacilli obtained from a case 

 of severe diarrhoea in an adult do grow in 10 per cent, 

 gelatine ; in weaker gelatine (5 per cent.) they grow well, but 

 their mode of growth is no doubt altogether different from 

 that of the choleraic comma-bacilli ; although they liquefy 

 the gelatine, they do so very rapidly, and the liquefied 

 gelatine is turbid, thick, and smells offensively. A very 

 striking case of the occurrence of crowds of comma-bacilii 

 in the intestine in diarrhoea I have met with in a monkey. 



FIG. 32. COVER-GLASS SPECIMEN FROM A CULTIVATION IN 10 PER CENT. 

 NUTRITIVE GELATINE OF THE NON-LIQUEFYING VARIETY OF COMMA-BACILLI 

 FROM A CASE OF NOMA IN A CHILD. 



1. Single comma-bacilli. 



2. Spiral forms. 



3. Wavy forms. 

 Magnifying power about 700. 



These animals in the summer months are very often affected 

 with diarrhoea. We have had during several years at the 

 Brown Institution several cases of severe diarrhoea in 

 monkeys ; some died, others recovered under treatment. 

 One animal was killed thirty hours after diarrhoea set in. 

 The stools were liquid, yellow, and contained granules of 

 faecal matter; in the large intestine was a quantity of the 

 same yellow thin fluid, in it were suspended numerous 

 mucus-flakes. I may state that this animal had been pur- 

 chased in good health about a fortnight before, and had been 



