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

Table 1

Univariable logistic regression analysis of S. aureus prevalence in different sample types.

Sample type	No. of tested	No. of positive	% prevalence (95% CI)	OR (95% CI)	P value
Raw milk	383	33	8.64 (6.02–11.91)	1 (−)	—
Bulk tank milk at farm	34	5	14.73 (4.95–31.05)	1.82 (0.66–5.03)	0.246
Bulk tank milk at collection centers	13	3	23.08 (5.04–53.81)	3.17 (0.83–12.10)	0.091
Cottage cheese	28	4	14.29 (4.03–32.66)	1.76 (0.57–5.38)	0.320
Curd milk	29	7	24.14 (10.30–43.54)	3.36 (1.34–8.46)	0.010
Overall	486	52	10.69 (8.09–13.79)

No. = number, CI = confidence interval, OR = odd ratio, chi-square (X²) = 0.21, and P value = 0.037.