Occurrence, antibiotic resistance, and enteroxigenicity of Staphylococcus spp. in tonsils of slaughtered pigs in Greece.

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Occurrence, antibiotic resistance, and enteroxigenicity of Staphylococcus spp. in tonsils of slaughtered pigs in Greece.

Lett Appl Microbiol. 2020 Jun 17;:

Authors: Pexara A, Solomakos N, Govaris A

Abstract
The aims of the present study were to examine the occurrence of Staphylococcus spp. in the tonsils of slaughtered pigs in a regional slaughterhouse in Greece, the antibiotic resistance of the Staphylococcus spp. isolates, and the enteroxigenicity of the S. aureus isolates. Staphylococcus spp. were isolated in 70 (48.61%) out of the total 144 tonsil samples. The predominant species was S. aureus in coagulase-positive staphylococci (CoPS), while the predominant species were Staphylococcus epidermidis and Staphylococcus saprophyticus in the coagulase-negative staphylococci (CoNS). Staphylococcus spp. isolates presented high antibiotic resistance frequencies to tetracycline (97.1%) or clindamycin (80.0%) and low antibiotic resistance frequencies to fusidic acid (14.3%). No methicillin-resistant S. aureus (MRSA) strains were identified, and all Staphylococcus spp. isolates were susceptible to vancomycin. Among the 26 S. aureus isolates, 21 (80.76%) possessed staphylococcal enterotoxin genes with 7 different enterotoxin gene profiles. The predominant enterotoxin profile was seg, sei, and sej with 7 S. aureus isolates. The occurrence of multidrug resistant Staphylococcus spp. in pig tonsils indicate public health risk to pork consumers and handlers in developing antimicrobial resistance.

PMID: 32557652 [PubMed - as supplied by publisher]