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Transactions of the Uoyal Society of South Africa. 
As ill the case of the urinary strains most belonged to the sub-group A ; 
only one anaerogenes type was noted (D3). 
The majority of the strains classified in this series were isolated from 
plates made directly from faeces, but 4 of sub-group B and 10 of C were 
obtained from cultures in brilliant green peptone water employed for the 
enrichment of B. typhosus (Browning, Gilmour and Mackie). As indicated 
later it was found that types of B and C sub-groups were more resistant to 
brilliant green than the A types ; hence the relatively large proportion of C 
types in the series. 
Among these strains were 4 iion-lactose-fermenters of the A12 type and 
1 of the A29 type; these two varieties differ from one another in motility. 
One non-lactose-fermenter of the A19 type was also isolated. This strain, 
like the similar type found in urine, developed a lactose-fermenting variant 
(v. Table XXIX). 
Five iion-lactose-feriiienters of the B102 type w^ere isolated from faeces, 
but all of these developed lactose-fermenting mutants. The other non- 
lactose-fermenters noted were BlOl (2 strains), B103 (2 strains), B104 (2 
strains), and B105. Single strains of the B103 and B105 types developed 
lactose-fermenting variants {v. Table XXIX). 
Twenty strains from appendix abscesses w^ere also investigated ; these 
were grouped as follows : 
Sub-group A, 18, of which the A3 and Al types were most prevalent. 
(All were lactose-fermenters [v. Table II].) 
Sub-group B, 1. 
Sub-group C, 1. 
A few strains from other sources were examined : 2 from cases of 
conjunctivitis both belonging to the A sub-group, 1 from a suppurative 
otitis (A15), 1 from a case of puerperal sepsis (A6), 2 from skin ulcers (C5 
and Dl), 1 from a case of cholecystitis (Bl), 1 from blood-culture after an 
abdominal operation (A2). 
The total number of strains examined from different sources could there- 
fore be classified as follows : 
Sub-group A, 157. 
(Al most prevalent type, 28 strains ; 
10 primarily non-lactose-fermenters.) 
Sub-group B, 52 
(Bl most prevalent, 13 strains ; 
21 primarily non-lactose fermenters.) 
Sub-group C, 27. 
(CI most prevalent type, 5 strains.) 
Sub-group D, 10. 
(Dl most prevalent type, 3 strains.) 
Considering the various strains collectively in these series which corre- 
