A Study of the B. coli Gro^q). 
327 
various types belonging to these sub-groups have been designated numeri- 
cally (i. e. 1, 2, 3, 4, etc.) in order of their prevalence in the series 
investigated. In the B. category the lactose -fernienters (1 to 11) have been 
distinguished from the non-lactose-fermenters (101 to 107) by a different 
series of numbers. The latter class includes certain "paracolon" types 
which in the serological tests appeared to be differentiated from organisms 
fermenting lactose in primary culture. 
Two hundred and forty-six strains from urine (pathological specimens), 
faeces and other sources have been carefully studied and classified in this way 
(Tables II, III, IV, Y). In Table VI, for comparison, those strains which 
correspond to MacConkey's types are classified according to his system. 
Table VI. 
MacConkey's types. 
Faeces. 
Urine. 
Appendix 
Abscesses. 
Other 
Sources. 
Total. 
No. 
1 
4 
1 
5 
No. 
2. 
B. acidi lactici 
1 
1 
No. 
4. 
B. Grunthal . 
5 
7 
2 
. 14 
No. 
5. 
B. vesicidosns 
. 5 
7 
5 
. 17 
No. 
7 
. 1 
1 
No. 
8 
. 2 
1 
1 
4 
No. 
33 
. 1 
1 
No. 
34. 
B. coli communh 
17 
9 
1 
1 
. 28 
No. 
35. 
B. Schafferi . 
6 
10 
3 
. 19 
No. 
67 
3 
2 
5 
No. 
71 
12 
16 
4 
2 
. 34 
No. 
72 
4 
6 
1 
1 
. 12 
No. 
74 
4 
8 
1 
. 13 
No. 
75 
1 
1 
No. 
99 
1 
1 
2 
No. 101 
. 1 
1 
2 
No. 103. 
B. lactis acroge7ies 
2 
1 
3 
No. 106 
2 
5 
7 
No. 107. 
B. coscoroha . 
2 
1 
3 
Total 172 
Note. — Of 246 strains 1 72 corresponded to types described by MacConkey. 
Types of Coliform Bacilli Found in Pyogenic Infection of the 
Urinary System. 
As shown by MacConkey, certain coliform types tend to be more 
prevalent than others in human and animal faeces ; thus the type desig- 
nated by him No. 71 is of commonest occurrence. As is well known. Gram- 
negative bacilli are the most frequent causative agents in pyogenic infections 
