Milk Safety Assessment, Isolation, and Antimicrobial Susceptibility Profile of Staphylococcus aureus in Selected Dairy Farms of Mukaturi and Sululta Town, Oromia Region, Ethiopia

Table 5

Risk factors for prevalence of Staphylococcus aureus in milk.

Risk factors	Total samples examined	No of samples positive (%)	χ2	P-value
Area
Mukaturi	78	17 (21.8)	4.424	0.035
Sululta	105	11 (10.5)
Age
Young (≥3-5)	59	6 (10.2)	16.201	≤0.001
Adult (>6- ≥9)	101	12 (11.9)
Old (>9)	23	10 (43.5)
Management system
Intensive	105	11 (10.5)	4.424	0.035
Semi-intensive	78	17 (21.8)
Parity level
Few (1-2 calves)	56	3 (5.4)	17.895	≤0.001
Mid (3-4 calves)	107	16 (15)
Many (>4 calves)	20	9 (45)
Lactation stage
Early (<3 moths)	60	8 (13.3)	1.131	0.568
Mid (3-6 moths)	101	15 (14.9)
Late (>6 moths)	22	5 (22.7)
Body condition scour
Poor	7	3 (42.9)	4.286	0.117
Modern	146	21 (14.4)
Good	30	4 (13.3)
Drainage condition of milking area:
Poor	104	21 (20.2)	4.448	0.035
Good	79	7 (8.9)