Resistencia a biocidas en cepas de Salmonella sp. aisladas de huevo
- Almeida González, Laura Beatriz
- Fernández Márquez, Mª Luisa
- López Aguayo, Mª Carmen
- Lucas López, Rosario
- Marín Garrido, Antonio
- Gálvez del Postigo Ruiz, Antonio
- Grande Burgos, María José
ISSN: 1130-2534
Year of publication: 2012
Volume: 25
Pages: 159-172
Type: Article
More publications in: Anales de la Real Academia de Ciencias Veterinarias de Andalucía Oriental
Abstract
We have studied the presence of presumptive salmonellae in comercial eggs, and the biocide tolerance of isolates. Presumptive salmonellae were detected in some 37 to 43% of samples tested. Some comercial brands were free of the bacterium, but all eggs from local stores and farms tested positive. Most isolates were inhibited by 0.1% of the biocides benzalkonium chloride, cetrimide, hexadecylpyridinium chloride, hexachlorophene, polyhexamethylen biguanide and P3 oxonia. A small percentage of isolates required up to ten-fold higher biocide concentrations for inhibition (as in the case of cetrimide, polyhexamethylen biguanide and P3 oxonia). Triclosan was apparently more effective, inhibiting 77% of isolates at 0.075%. However, the remaining of isolates only were inhibited at 1% of the biocide. Results from this study suggest that a low percentage of the Salmonella population on egg surfaces can tolerate biocides.