Table 1.

Farm data comprising Somatic cell counts (SCC), Staphylococcus spp. positive cows and bulk tank milk samples.

Farm	Lactating cows (n)	Milk amount (l)a	Milk amount/cow (l)	Ø Herd SCCb	Ø SCCc of SA pos. cows	Individual cowd		BTMe
						S. aureus	CNS	S. aureus	CNS
1	43	743,1	17,28	228.976	55.000	1	11	−	+
2	32	93,1	2,91	162.531		0	8	−	+
3	17	83	4,88	134.176	181.909	10	1	+	+
4	10	137,7	13,77	141.700		0	0	+	+
5	21	237,9	11,33	222.857		0	2	−	+
6	16	631,6	39,48	233.187	859.500	2	1	+	−
7	25	525,7	21,03	246.840	381.000	1	0	−	+
8	18	127	7,06	169.000	74.000	1	3	+	+
9	6	41,7	6,95	98.166		0	2	−	+
10	6	44	7,33	236.666		0	1	−	+
11	9	436,4	48,49	747.625		0	1	−	+
12	11	261,2	23,75	301.909		0	0	+	+
13	13	104,8	8,06	125.615	110.300	6	0	+	+
14	29	482,2	16,63	168.642	349.500	2	2	+	+
15	22	292,4	13,29	412.363	132.500	2	3	+	+
16	10	518,7	51,87	173.111		0	0	+	+
17	5	291,4	58,28	77.000	23.000	1	0	−	+
18	3	56,8	18,93	69.333		0	0	+	+

^aAverage milk amount per milking.

^bSCC: Average somatic cell count = cells/ml determined on herd level including SCC from all cows.

^cSCC: Average somatic cell count = cells/ml determined on herd level including SCC from cows tested positive for S. aureus.

^dQuarter milk samples positive for S. aureus and Coagulase Negative Staphylococci (CNS) per individual cow and farm.

^eBTM: bulk tank milk samples positive for S. aureus.