Species distribution and in vitro antimicrobial susceptibility of coagulase-negative staphylococci isolated from bovine mastitic milk

Table 1 Distribution of coagulase-negative Staphylococcus species isolated in bovine milk samples in 2001 (dataset 1) and 2012 (dataset 2)

CNS species	2001		2012		In total
CNS species	n	%	n	%	n	%
S. agnetis	7	2.2	3	3.4	10	2.5
S. capitis	1	0.3	1	1.1	2	0.5
S. chromogenes	48	15.4	6	6.8	54	13.5
S. cohnii	7	2.2	5	5.7	12	3.0
S. epidermidis	78	25.0	27	30.7	105	26.3
S. equorum	3	1.0	0	0	3	0.8
S. haemolyticus	37	11.9	5	5.7	42	10.5
S. hyicus	4	1.3	1	1.1	5	1.3
S. kloosii	0	0	3	3.4	3	0.75
S. pasteuri	2	0.6	0	0	2	0.5
S. saprophyticus	2	0.6	1	1.1	3	0.8
S. sciuri	2	0.6	1	1.1	3	0.8
S. simulans	78	25.0	30	34.1	108	27.0
S. warneri	32	10.3	1	1.1	33	8.3
S. xylosus	8	2.6	2	2.3	10	2.5
Staphylococcus sp.	3	1.0	2	2.3	5	1.3
In total	312		88		400

The material consisted of CoNS isolates from two studies, Pitkälä et al. [2] (dataset 1) and Finnish veterinary antimicrobial resistance monitoring program 2010–2012 [18] (dataset 2). In dataset 1 all quarters of cows were sampled in a mastitis survey, in dataset 2 samples originated from quarters with mastitis

ISSN: 1751-0147