Risk of Shiga Toxigenic Escherichia coli O157:H7 Infection from Raw and Fermented Milk in Sokoto Metropolis, Nigeria

Table 3

Frequency of Escherichia coli O157:H7 isolates from raw and fermented milk samples.

	Number of samples positive for Escherichia coli O157:H7	Number of samples negative for Escherichia coli O157:H7	Total
Raw milk	3	157	160
Fermented milk	2	98	100
Total	5	255	260

= 0.943, OR = 0.94, (95% CI: 0.154–5.704), OR:odds ratio, and CI: confidence interval.