J. Microbiol. Methods

Coagulase-positive staphylococci (CoPS) including S. pseudintermedius, S. schleiferi subsp. coagulans and S. aureus are etiological agents of dermatitis in companion animals and can be zoonotic pathogens. To date no consensual biochemical marker for routine microbiological identification of these species has been identified. The aim of this study was to evaluate biochemical markers and compare the results with the approved molecular method, multiplex-PCR (M-PCR), and confirm their species-specific phenotypic characteristic by using SDS-PAGE. The distribution and frequency of CoPS species were also determined. Three hundred and thirty-seven canine CoPS isolates were obtained from the nasal mucosa, perineum and groins of 66 healthy dogs and were identified by the M-PCR as S. aureus (n=5), S. pseudintermedius (n=263) and S. schleiferi subsp. coagulans (n=69). Selected biochemical tests including the Voges-Proskauer test, mannitol broth fermentation, the assimilation of maltose, galactose, trahalose and lactose using broth medium, were successfully used to distinguish the three species of canine CoPS from other CoPS species. Additionally, species-specific protein patterns were also found to be useful for phenotypic differentiation, with good agreement with the results of M-PCR and the use of biochemical markers. S. aureus occured infrequently on dog skin while co-colonization with S. pseudintermedius and S. schleiferi subsp. coagulans was observed. We propose the use of consensual biochemical markers of canine CoPS with the presence of the unique protein patterns as an alternative tool for conventional laboratory use.

Source:http://purl.uniprot.org/citations/21586304

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