Table 1.

Isolation frequency of E. coli O157:H7 from different sample types in abattoir and butcher shops, Hawassa, southern Ethiopia

Sample source	Sample type	Number of samples		95% confidence interval
		Examined	Positive (%)
Abattoir	Fecal sample	150	7 (4.7)	2.0–10.0
	Carcass Swab	150	4 (2.7)	0.4–4.2
	Knife swab	30	0
	Personnel hand swab	30	0
	Meat transporters cloth swab	30	0
Butcher shops	Meat sample	150	3 (2)	4.0–6.0
	Butcher men hand swab	30	0
	Cutting board swab	30	1 (3.3)	0.08–17
	Knife swab	30	0
Total		630	15 (2.4)	1.3–3.9