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The aim of this study was to evaluate a simple and rapid DNA extraction method combined with a multiplex polymerase chain reaction (mPCR) for the identification of the major mastitis pathogens (Staphylococcus aureus, Streptococcus agalactiae, Escherichia coli and Mycoplasma bovis) from milk samples. Of the 200 California Mastitis Test (CMT) positive milk samples, 45 (22.5%), 21 (10.5%) and 11 (5.5%) were detected as positive for the presence of S. aureus, S. agalactiae and E. coli by culture, respectively. In mPCR by DNA isolation method optimised here, S. aureus, S. agalactiae and E. coli wer ...More
Staphylococcusaureus is a pathogenic microorganism causing food intoxications and producing many heat-stable toxins. In this study S. aureus prevalence, the presence of enterotoxin genes (sea, seb, sec, sed, see, seg, seh, sej, sei) together with the toxic shock syndrome toxin gene (tsst) were investigated by mPCR. A total of 500 samples were obtained from different animal's meat (sheep, goat, cattle and chicken), hands of staff and surfaces in contact with food. Of 500 samples, 126 (25.2%) were contaminated with S. aureus. One or more staphylococcal enterotoxin (se) gene was determined in 87 ...More