Role of bacteria in carcinogenesis, with special reference to carcinoma of the gallbladder

Table 3 Spectrum of bacteria isolated from bile (Brook et al[73])

Organism	No. of isolates	%
Aerobic bacteria
Escherichia coli	71	32.9
Group D streptococci	42	19.4
Klebsiella species	29	15.3
Enterobacter species	26	12.5
Proteus species	15	6.9
α-haemolytic streptococci	11	5.1
Citrobacter species	8	3.6
Staphylococcus species	7	3.2
γ-haemolytic streptococci	5	2.3
Pseudomonas species	2	0.9
Anaerobic bacteria
Clostridium perfringens	23	29.9
Bacteroides fragilis	9	11.7
Other Bacteroides species	5	6.5
B. thetaiotamicron	4	5.2
B. ovatus	2	5.2
B. distasonis	2	2.6
Propionibacterium acne	7	9.1