Antimicrobial Resistance in Poultry Farming: A Look Back at Environmental Escherichia coli Isolated from Poultry Farms during the Growing and Resting Periods

Table 1

The number of Escherichia coli isolates during the resting and growing periods in three poultry farms.

Bacteria	Farm	Period	Positive/total swabs (%)	value	Pearson χ^2value^1, df^2
E. coli (n = 105)	A	Resting	8/28, 28.6	0.17	1.88, 1
	A	Growing	18/40, 45.0
	B	Resting	14/26, 53.8	0.24	1.35, 1
	B	Growing	22/32, 68.8
	C	Resting	4/51, 7.8	<0.01	47.75, 1
	C	Growing	39/52, 75.0

¹Pearson χ² test was used to calculated value of positive and negative samples in different periods of each farm. ²df = degree of freedom.