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HOME > J. Microbiol > Volume 50(3); 2012 > Article
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Identification and Methicillin Resistance of Coagulase-Negative Staphylococci Isolated from Nasal Cavity of Healthy Horses
Jolanta Karakulska , Karol Fijałkowski , Paweł Nawrotek , Anna Pobucewicz , Filip Poszumski , Danuta Czernomysy-Furowicz
Journal of Microbiology 2012;50(3):444-451.
DOI: https://doi.org/10.1007/s12275-012-1550-6
Published online: June 30, 2012
Department of Immunology, Microbiology and Physiological Chemistry Faculty of Biotechnology and Animal Husbandry West Pomeranian University of Technology, Szczecin, Poland Doktora Judyma 24, 71-466 Szczecin, Poland
Corresponding author:  Karol Fijałkowski , Tel: +48914496710, 
Received: 3 November 2011   • Accepted: 16 February 2012
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Abstract

The aim of this study was an analysis of the staphylococcal flora of the nasal cavity of 42 healthy horses from 4 farms, along with species identification of CoNS isolates and determination of resistance to 18 antimicrobial agents, particularly phenotypic and genotypic methicillin resistance. From the 81 swabs, 87 staphylococci were isolated. All isolates possessed the gap gene but the coa gene was not detected in any of these isolates. Using PCR-RFLP of the gap gene, 82.8% of CoNS were identified: S. equorum (14.9%), S. warneri (14.9%), S. sciuri (12.6%), S. vitulinus (12.6%), S. xylosus (11.5% ), S. felis (5.7%), S. haemolyticus (3.4%), S. simulans(3.4%), S. capitis (1.1%), S. chromogenes (1.1%), and S. cohnii subsp. urealyticus (1.1%). To our knowledge, this was the first isolation of S. felis from a horse. The species identity of the remaining Staphylococcus spp. isolates (17.2%) could not be determined from the gap gene PCR-RFLP analysis and 16S rRNA gene sequencing data. Based on 16S-23S intergenic transcribed spacer PCR, 11 different ITS-PCR profiles were identified for the 87 analyzed isolates. Results of API Staph were consistent with molecular identification of 17 (19.5%) isolates. Resistance was detected to only 1 or 2 of the 18 antimicrobial agents tested in the 17.2% CoNS isolates, including 6.9% MRCoNS. The mecA gene was detected in each of the 5 (5.7%) phenotypically cefoxitin-resistant isolates and in 12 (13.8%) isolates susceptible to cefoxitin. In total, from 12 horses (28.6%), 17 (19.5%) MRCoNS were isolated. The highest percentage of MRCoNS was noted among S. sciuri isolates (100%).

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    Identification and Methicillin Resistance of Coagulase-Negative Staphylococci Isolated from Nasal Cavity of Healthy Horses
    J. Microbiol. 2012;50(3):444-451.   Published online June 30, 2012
    DOI: https://doi.org/10.1007/s12275-012-1550-6
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