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Phenotypic characterization of Staphylococcus aureus isolated from foods of animal origin and other related sources
Author(s) -
Silva Julia Rosin,
Mello Greyce Silveira,
Moraes Thamíris Pereira,
Moreira Lauren Machado,
Gonçalves Thaís Gonçalves,
Timm Cláudio Dias
Publication year - 2020
Publication title -
journal of food processing and preservation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.511
H-Index - 48
eISSN - 1745-4549
pISSN - 0145-8892
DOI - 10.1111/jfpp.14725
Subject(s) - biofilm , staphylococcus aureus , biology , microbiology and biotechnology , raw milk , bovine milk , antimicrobial , food science , bacteria , genetics
The present study aimed to phenotypically characterize S. aureus isolates originated from bovine raw milk and different steps of the pig slaughterhouse flowchart to evaluate the biofilm formation ability of these bacterial isolates, the factors that may influence this ability, the behavior of these bacterial pathogens in the food environment, and the sensitivity of these microorganisms to methicillin. In this survey, 28 S. aureus isolates were analyzed, seven of which originated from bovine raw milk, and 21 from swine samples. Biofilm production ability was observed in 57.1% (16/28) of the isolates tested corresponding to 85.7% (6/7) of bovine milk samples and 47.6% (10/21) of pig samples. Most of the isolates previously classified as strong biofilm formers maintained this ability after being exposed to different types of sublethal stress. Regarding the sensitivity of the isolates to methicillin, 42.9% (12/28) were resistant. Practical applications The practical applications are the phenotypic characterization of S. aureus , verification of biofilm formation by gifts present in the food industry, and of antimicrobial resistance of isolates.