Isolation and Identification of Staphylococcus aureus from Milk and Milk Products, Associated Factors for Contamination, and Their Antibiogram in Holeta, Central Ethiopia

Table 3

Results of the analysis of the association between the prevalence of Staphylococcus aureus and potential risk factors in dairy cattle farms.

Variables	Categories	No. of tested	No. of positive	Percentage	Chi-square	P value
Farm hygiene	Moderate	10	4	40.00	—	0.457
	Poor	24	14	58.33
Farm size	Small (≤10)	9	2	22.22	—	0.052
	Large (>10)	25	16	64.00
Management system	Intensive	12	10	83.33	6.88	0.009
	Semi-int.	22	8	36.36
Food safety training	No	26	11	42.31	5.02	0.025
	Yes	8	7	87.50
Use of disinfectant	No	27	15	55.56	—	0.681
	Yes	7	3	42.86
Housing types	Loose	27	12	44.44	3.80	0.051
	Individual	7	6	85.71
Sanitation of the farm	Poor	20	9	45.00	1.23	0.268
	Fair	14	9	64.29

Fisher’s exact test P value; semi-int. = semi-intensive.