TABLE 2.

Antimicrobial resistance genes identified in S. aureus from different raw milks.

Resistance gene	Number of positive strains for animal species (%)				Total number of positive strains (%)	χ 2	P
	Goat	Buffalo	Camel	Yak
blaZ	10/16(62.5%)	3/9(33.3%)	3/6(50%)	2/5(40%)	18/26(69.2%)	1.792	0.710
mecA	6/16(37.5%)	0/9(0)	0/6(0)	0/5(0)	6/26(23.1%)	5.887	0.074
cfxA	3/16(18.8%)	2/9(22.2%)	1/6(16.7%)	0/5(0)	6/26(23.1%)	5.887	0.074
ant(4′)-Ia	3/16(18.8%)	2/9(22.2%)	1/6(16.7%)	0/5(0)	6/26(23.1%)	1.010	1.000
aac6′-aph2″	7/16(43.8%)	3/9(33.3%)	2/6(33.3%)	1/5(20%)	13/26(50.0%)	0.709	1.000
ant(6)-Ia	1/16(6.3%)	0/9(0)	0/6(0)	0/5(0)	1/26(3.9%)	–	–
fexA	2/16(12.5%)	0/9(0)	0/6(0)	0/5(0)	2/26(7.7%)	1.692	1.000
catA	0/16(0)	0/9(0)	0/6(0)	0/5(0)	0/26(0)	–	–
tet(M)	9/16(56.3%)	0/9(0)	0/6(0)	1/5(20%)	10/26(38.5%)	10.855	0.004*
tet(L)	6/16(37.5%)	1/9(11.1%)	0/6(0)	0/5(0)	7/26(26.9%)	4.095	0.215
tet(K)	0/16(0)	0/9(0)	2/6(33.3%)	0/5(0)	2/26(7.7%)	6.822	0.028*
tet(O)	0/16(0)	0/9(0)	0/6(0)	1/5(20%)	1/26(3.9%)	5.114	0.115
erm(A)	0/16(0)	0/9(0)	0/6(0)	0/5(0)	0/26(0)	–	–
erm(B)	2/16(12.5%)	0/9(0)	1/6(16.7%)	0/5(0)	3/26(11.5%)	1.990	0.820
erm(C)	4/16(25%)	2/9(22.2%)	0/6(0)	0/5(0)	6/26(23.1%)	2.222	0.589
msr(A)	0/16(0)	0/9(0)	0/6(0)	0/5(0)	0/26(0)	–	–
msr(B)	1/16(6.3%)	2/9(22.2%)	1/6(16.7%)	0/5(0)	4/26(15.4%)	2.926	0.329

“–” indicates no such value; “*” indicates that the difference is statistically significant (P < 0.05).