Table 2.

Prevalence of E. coli in various types of samples obtained from diseased cattle.

Examined samples	Number and percentage of E. coli
	Farm 1 n = 80		Farm 2 n = 80		Total
	N	%	N	%	N	%
Milk	8/20	40	9/20	45	17/40	42.5
Blood	6/20	30	5/20	25	11/40	27.5
Nasal swabs	3/20	15	4 /20	20	7/40	17.5
Fecal swabs	6/20	30	7/20	35	13/40	32.5
Total	23/80	28.75	25/80	31.25	48/160	30

Chi-square value = 3.112, P value = 0.375.