Multiplex PCR and RPLA detection of enterotoxins in Staphylococcus aureus strains isolated from milk, dairy products and human faecal samples

Authors

  • Maria Cristina Ossiprandi Department of Veterinary Medical Science - Unit of Infectious Diseases and Microbiology Parma University, Via del Taglio n° 10 - 43126 Parma - Italy
  • Laura Zerbini Department of Veterinary Medical Science - Unit of Infectious Diseases and Microbiology Parma University, Via del Taglio n° 10 - 43126 Parma - Italy

DOI:

https://doi.org/10.24297/jab.v4i1.1944

Keywords:

Staphylococcal enterotoxins, multiplex PCR, RPLA, milk and dairy products, human faecal samples

Abstract

Staphylococcus aureus is considered the worlds third most important cause of food-borne illnesses, of which foods of animal origin, especially milk and dairy products, are responsible. Many S. aureus strains can produce one or more of enterotoxins (SEs), that are recognized agents of intoxication staphylococcal food-borne syndrome but may be also involved in other types of infections with sequelae of shock in humans and animals. The aim of this research was to detect classical staphylococcal SE genes (sea to see) by multiplex PCR and to reveal toxin in vitro production by reversed passive latex agglutination (RPLA) in 258 S. aureus isolates from milk and dairy products of mastitic bovines and from human diarrhoeic faecal samples. Staphylococcal enterotoxin genes were detected in 84 isolates: 34 strains were sea+, 4 seb+, 13 sec+, 20 sed+, 11 sea+sed+, and 2 sec+sed+. Equivocal result was obtained by RPLA for 4 of the 84 strains tested, relatively to SEA and SED. Our results prove that multiplex PCR is the preferential choose to characterize the toxigenicity of S. aureus strains and could complete efficaciously the conventional laboratory diagnosis by increasing its sensibility.

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Author Biography

Maria Cristina Ossiprandi, Department of Veterinary Medical Science - Unit of Infectious Diseases and Microbiology Parma University, Via del Taglio n° 10 - 43126 Parma - Italy

Department of Veterinary Medical Science - Unit of Infectious Diseases and Microbiologymy research field corrisponds to bacteriology, epidemiological studies concerning infectious bacteria

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Published

2014-02-18

How to Cite

Ossiprandi, M. C., & Zerbini, L. (2014). Multiplex PCR and RPLA detection of enterotoxins in Staphylococcus aureus strains isolated from milk, dairy products and human faecal samples. JOURNAL OF ADVANCES IN BIOLOGY, 4(1), 312–317. https://doi.org/10.24297/jab.v4i1.1944

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