Table 1.

Distribution of the 103 Staphylococcus aureus clinical mastitis isolates according to region and herd

Region	Herd		No. of milk samples	No. of isolates	Total isolates of region
Beijing	a		407	41	48
	b		53	5
	c		28	2
Ningxia	d		46	5	16
	e		31	4
	f		29	3
	g		28	3
	h		28	1
Heilongjiang	i		56	11	11
Hebei	j		38	6	11
	k		23	4
	l		22	1
Inner Mongolia	m		25	3	5
	n		22	2
Liaoning	o		15	2	4
	p		15	2
Guangdong	q		98	3	3
Shandong	r		40	3	3
Henan	s		17	2	2
Total	19		1021	103	103