Table 1.

The geometric mean somatic cell counts (SCCs) and 95% confidence intervals of all milk samples and milk samples classified as mastitic*, culture positive for different Staphylococcus species, and the percentages of non-mastitic quarter milk samples in each Staphylococcus species

Staphylococcus species isolated	N	Geomean SCC × 1000 all quarters	95% CI × 1000	Geomean SCC × 1000 mastitic quarters	95% CL × 1000	% Non-mastitic quarters
S. agnetis/S. hyicus	25	342	182–642	472	299–744	12.0
S. aureus	42	327	201–532	529	370–755	14.3
S. chromogenes	158	131	102–168	175	146–210	13.9
S. cohnii	24	104	55–198	279	163–476	33.3
S. epidermidis	279	80	66–97	282	238–333	41.9
S. haemolyticus	114	111	83–149	295	213–377	33.3
S. simulans	225	216	175–267	323	277–377	13.3
S. warneri	105	52	38–71	219	163–295	50.5
S. xylosus	43	81	50–131	175	117–260	32.6
Other speciesa	40	50	30–82	172	109–271	45.0

^*SCC > 50,000 cells/mL

^aOther species: 1 S. arlettae, 10 S. capitis, 6 S. devriesei, 4 S. equorum, 2 S. hominis, 2 S. lugdunensis, 2 S. nepalensis, 4 S. pasteuri, 1 S. rostri, 2 S. saprophyticus, 5 M. sciuri, 1 S. succinus