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Compendio de Ciencias Veterinarias

On-line version ISSN 2226-1761


DINATALE, F; CARDOZO, L; VERA, A  and  SANDOVAL, A. Determination of Listeria monocytogenes, Salmonella spp. and coliforms in Paraguay cheese commercialized in different sales points in the cities; José Falcón, Benjamín Aceval and Villa Hayes 2019. Compend. cienc. vet [online]. 2020, vol.10, n.2, pp.12-20. ISSN 2226-1761.

ABSTRACT. This research work was carried out with the objective of assessing; L. monocytogenes, Salmonella spp. and coliforms in Paraguay cheese marketed in different sales points of the cities of; José Falcón, Benjamín Aceval and Villa Hayes of the Presidente Hayes Department. A total of 24 samples of cheese Paraguay were obtained, which were analyzed following the ISO 4831:2006; ISO 4832:2006; ISO 6785/IDF 093:2001 and ISO 1190-1 methods. This study revealed that 100% were negative for Listeria monocytogenes and for Salmonella spp. However, coliforms were found in 87% of the samples, of which 15 (62% of the total) presented coliform counts above the maximum allowed by the Paraguayan Standard NP 25 053 11, on the other hand, 6 samples (25% of the total) had a coliform count within the values established by the standard. In order to confirm E. coli, isolation of presumptive colonies were culture and confirmatory biochemical tests were carried out, which revealed that 9 (38%) of the Samples were positive for E. coli.

Keywords : Paraguay cheese; Listeria monocytogenes; Salmonella spp.; coliforms; Escherichia coli; bacteria; determination..

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