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Table 2 Statistically significant differences in the incidence of bacteriocin encoding determinants among UTI and control E. coli strains

From: Bacteriocin synthesis in uropathogenic and commensal Escherichia coli: colicin E1 is a potential virulence factor

Types of bacteriocin producers

No. of UTI

bacteriocin producers

(%)

No. of control bacteriocin producers

(%)

Statistical significance

of the difference*

microcin H47 producers

74 (37.9)

61 (27.0)

p = 0.02

producers of colicins Ia and Ib among mono-producers

10 (5.1)

31 (13.7)

p = 0.003

producers of three or more bacteriocins

39 (20.0)

28 (12.4)

p = 0.03

colicin E1 producers

43 (22.1)

23 (10.2)

p = 0.0008

producers of colicin E1 among bacteriocin triple- and multi-producers

28 (14.4)

9 (4.0)

p = 0.0002

bacteriocin E1 and Ia producers

19 (9.7)

10 (4.4)

p = 0.03

bacteriocin E1, Ia, and mV producers

17 (8.7)

7 (3.1)

p = 0.01

  1. *statistical methods derived from the binomial distribution were used (see Methods)