Table 1. The overall drug susceptibility patterns of the S. aureus isolates from bovine mastitis cases^*.

		Penicillin		Gentamicin		Tetracycline		Erythromycin		Clindamycin		Ciprofloxacin		Sulfafurazole		Cefazolin		Vancomycin		Oxacillin
Region#		R	S	R	S	R	S	R	S	R	S	R	S	R	S	R	S	R	S	R	S
Shanghai(52)	Number of isolates	52	0	11	37	23	29	17	35	24	21	3	48	49	3	6	46	0	52	11	41
	Percentage (%)	100	0	21.2	71.2	44.2	55.8	32.3	67.3	46.9	39.5	5.7	92.3	94.2	5.8	11.5	88.5	0	100	21.2	78.8
Sichuan(16)	Number of isolates	16	0	0	15	6	10	3	12	2	14	0	15	12	4	1	15	0	16	2	14
	Percentage (%)	100	0	0	93.75	37.5	62.5	18.75	75	14.3	85.7	0	93.75	75	25	6.67	93.33	0	100	12.5	87.5
Guizhou(18)	Number of isolates	18	0	0	18	4	14	7	11	2	16	0	18	12	6	0	18	0	18	0	18
	Percentage (%)	100	0	0	100	22.22	77.78	38.89	61.11	12.5	87.5	0	100	66.67	33.33	0	100	0	100	0	100
Gansu(17)	Number of isolates	14	1	1	16	3	13	5	6	2	10	0	17	13	3	0	17	0	17	0	17
	Percentage (%)	82.4	5.88	5.88	94.1	17.7	76.5	29.4	35.3	11.8	58.8	0	100	76.5	17.7	0	100	0	100	0	100
Total(103)	Number of isolates	100	1	12	86	36	66	32	64	30	61	3	98	86	16	7	96	0	103	13	90
	percentage (%)	97.1	0.97	11.7	83.5	34.95	64.1	31.1	62.1	29.1	59.2	2.9	95.1	83.5	15.5	6.8	93.2	0	100	12.6	87.4

^*R: resistant; S: susceptible.

^#The number in parenthesis indicate the total number of isolates from a given region.