Microbiological quality of marketed ricotta cheese and disease risks associated with Listeria monocytogenes contamination
Vol. 70 No. 4 (2011), ORIGINAL ARTICLE
Vol. 70 No. 4 (2011)

Microbiological quality of marketed ricotta cheese and disease risks associated with Listeria monocytogenes contamination

ORIGINAL ARTICLE
https://doi.org/10.53393/rial.2011.v70.32514
Published 2011-04-01
Luciana Maria Ramires Esper
Universidade Federal Fluminense, Faculdade de Farmácia, Departamento de Bromatologia, Laboratório de Controle Microbiológico de Alimentos, Niterói, RJ
https://orcid.org/0000-0002-6789-8789
Dirce Yorika Kabuki
Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos, Departamento de Tecnologia de Alimentos, Laboratório de Higiene e Legislação, Campinas, SP
Arnaldo Yoshiteru Kuaye
Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos, Departamento de Tecnologia de Alimentos, Laboratório de Higiene e Legislação, Campinas, SP
PDF (Português (Brasil))

Keywords

ricotta cheese
Microbiological quality
Listeria monocytogenes
Virulence genes
PCR

How to Cite

1.
Esper LMR, Kabuki DY, Kuaye AY. Microbiological quality of marketed ricotta cheese and disease risks associated with Listeria monocytogenes contamination. Rev Inst Adolfo Lutz [Internet]. 2011 Apr. 1 [cited 2024 Jul. 22];70(4):554-9. Available from: https://periodicos.saude.sp.gov.br/RIAL/article/view/32514
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Abstract

The present study aimed at evaluating the quality of ricotta cheeses marketed in the region of Campinas, SP, and to characterize the pathogenic potential of the isolated Listeria monocytogenes strains. Of 45 analyzed samples, 46.7% (21/45) did not comply with the Brazilian microbiological standard established. Most of the evaluated samples showed the microorganisms counts above those established by the regulation, that is, 46.7% for thermotolerant coliforms, 2.2% for coagulase-positive staphylococci, and 6.7% for Listeria monocytogenes. No Salmonella was isolated from these samples. It was evidenced the ocurrence of Listeria monocytogenes strains, with virulence genes acta type 4 and hly type 1, and classified as lineage I, which indicate the pathogenic potential for human. This study evidenced that this class of product deserves more attention from the scientific community, and also from manufacturing sector and sanitary surveillance bureau, improving the products quality, and consequently the consumer safety.

https://doi.org/10.53393/rial.2011.v70.32514
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