Prevalence of MRSA types in slaughter pigs in different German abattoirs

Tenhagen, B.-A.; Fetsch, A.; Stuhrenberg, B.; Schleuter, G.; Guerra, B.; Hammerl, J. A.; Hertwig, S.; Kowall, J.; Kampe, U.; Schroeter, A.; Braunig, J.; Käsbohrer, A.; Appel, B.

To investigate the prevalence of types of meticillin-resistant Staphylococcus aureus (MRSA) in slaughter pigs in German abattoirs, nasal swabs were collected from a total of 1026 pigs in five abattoirs after stunning in the course of two studies, and examined for MRSA. Study 1 included four abattoirs; study 2 was carried out in one large abattoir. Isolates were tested for antimicrobial susceptibility and characterised using spa-typing, multilocus sequence typing (MLST) and typing of the staphylococcal cassette chromosome, SCCmec. Overall, MRSA was isolated from 70.8 per cent of 520 samples in study 1 and from 49.0 per cent of 506 samples in study 2. The proportion of positive samples varied substantially between the abattoirs in study 1. Most isolates belonged to spa-types t011 and t034 and SCCmec types III and V. MLST of selected isolates revealed that they were all MLST ST398. Besides beta-lactams, 100 per cent of the isolates were resistant to tetracycline, 80.5 per cent were resistant to erythromycin and 80.7 per cent were resistant to clindamycin. Less than 5 per cent of the isolates were resistant to other antimicrobials

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Tenhagen, B.-A. / Fetsch, A. / Stuhrenberg, B. / et al: Prevalence of MRSA types in slaughter pigs in different German abattoirs. 2009.

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