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Table 1 Collections of staphylococci isolated from bovine mastitis included in the study*

From: Occurrence and characterization of methicillin-resistant staphylococci from bovine mastitis milk samples in Finland

Material

Origin

Year

Isolates

Farms

OxaMIC = R

MRS isolates

MRS-positive farms

MRS species

n

n

n (%)***

n (%)

n (%)

1) S. aureus isolates from the Finnish Food Safety Authority (Evira)

Subclinical and clinical mastitis cases nationwide.

2003–2008

135

117

18 (13.3)

2 (1.5)

2 (1.7)

MRSA

2) CoNS isolates from Bovine Mastitis Survey material (Pitkälä et al., 2004)

Subclinical and clinical mastitis, randomized sample of a nationwide bovine mastitis survey.

2001

324

179

34 (10.5)

17 (5.2)

16 (8.9)

All MRSE, 2 isolates originating from the same farm

3) CoNS isolates from the University Ambulatory Clinic** material (Taponen et al., 2006)

Subclinical and clinical mastitis, on-call area of the University Ambulatory clinic.

1999–2002

110

57

6 (5.5)

2 (1.8)

2 (3.5)

1 MRSE 1 MR-S. fleurettii

  1. * All isolates have been selected from the collections so that there is only one isolate per staphylococcal species per cow.
  2. ** The Ambulatory Clinic of the Department of Production Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki.
  3. *** The resistance breakpoints used for oxacillin were >2 μg/ml for bacterial collections 1 and 2, and >1 μg/ml for collection 3 (see text for details).
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Acta Veterinaria Scandinavica

ISSN: 1751-0147