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.