Characterisation of Staphylococcus aureus and Staphylococcus aureus- like strains isolated from table eggs

摘要

The aim of the study was to provide a detailed phenotypic and genotypic characterisation of Staphylococcus aureus strains and the group of microorganisms with unusual biochemical patterns (called Staphylococcus aureus-Mks) isolated from table chickeneggs. All of the strains tested exhibited resistance to at least one of the 17 antibiotics tested, and 55.55% ofisolates were found to be resistant to five or more of them. PCR used for detection of the methiciilin resistance gene (mecA) confirmed the presence of a specific product of 533 bp in the case of two of the isolated S. auretis-liks strains. Analysis of the phylogenetic relationship between eight of 5. aureus and ten S. aureus-Wke strains distinguished 18 macrorestriction profiles following digestion with Smal endonuclease, indicating that there were no identical strains with the same macrorestriction profile. However, the presence of methicillin-resistant strains indicates a serious risk to consumer health.