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Salmonella, Listeria monocytogenes, and Indicator Microorganisms on Hass Avocados Sold at Retail Markets in Guadalajara, Mexico.
García-Frutos, Ramón; Martínez-Chávez, Liliana; Cabrera-Díaz, Elisa; Gutiérrez-González, Porfirio; Montañez-Soto, José Luis; Varela-Hernández, Juan José; Martínez-Gonzáles, Nanci Edid.
Afiliação
  • García-Frutos R; Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Michoacán, Instituto Politécnico Nacional, Justo Sierra No. 28, Jiquilpan, Michoacán 59510, México (ORCID: 0000-0002-0318-4664 [J.L.M.-S]).
  • Martínez-Chávez L; Departamentos de Farmacobiología y Matemáticas, CUCEI, Universidad de Guadalajara, Marcelino García Barragán 1451, Guadalajara, Jalisco 44430, México (ORCID: 0000-0001-6816-937X [L.M.-C.]; 0000-0001-5144-0151 [P.G.-G.]; 0000-0002-5168-4866 [N.E.M
  • Cabrera-Díaz E; Departamento de Salud Pública, CUCBA, Universidad de Guadalajara, Camino Ramón Padilla Sánchez 2100, Zapopan, Jalisco 45200, México (ORCID: 0000-0002-1970-2104 [E.C.-D.]).
  • Gutiérrez-González P; Departamentos de Farmacobiología y Matemáticas, CUCEI, Universidad de Guadalajara, Marcelino García Barragán 1451, Guadalajara, Jalisco 44430, México (ORCID: 0000-0001-6816-937X [L.M.-C.]; 0000-0001-5144-0151 [P.G.-G.]; 0000-0002-5168-4866 [N.E.M
  • Montañez-Soto JL; Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Michoacán, Instituto Politécnico Nacional, Justo Sierra No. 28, Jiquilpan, Michoacán 59510, México (ORCID: 0000-0002-0318-4664 [J.L.M.-S]).
  • Varela-Hernández JJ; Departamento de Ciencias Médicas y de la Vida, CUCIENEGA, Universidad de Guadalajara, Av. Universidad 1115, Ocotlán, Jalisco 47820, México (ORCID: 0000-0002-3801-0322 [J.J.V.-H.]).
  • Martínez-Gonzáles NE; Departamentos de Farmacobiología y Matemáticas, CUCEI, Universidad de Guadalajara, Marcelino García Barragán 1451, Guadalajara, Jalisco 44430, México (ORCID: 0000-0001-6816-937X [L.M.-C.]; 0000-0001-5144-0151 [P.G.-G.]; 0000-0002-5168-4866 [N.E.M
J Food Prot ; 83(1): 75-81, 2020 Jan.
Article em En | MEDLINE | ID: mdl-31851548
Hass avocados may become contaminated with Salmonella and Listeria monocytogenes at the farm and the packing facility or later during transportation and at retail. In Mexico, avocados are frequently sold in bulk at retail markets, where they are stored at room temperature for several hours or days and exposed to potential sources of microorganisms. These conditions may favor the entry, adhesion, survival, and biofilm formation of Salmonella and L. monocytogenes. The aim of this study was to determine the occurrence of Salmonella, L. monocytogenes, and other Listeria species and the levels of indicator microorganisms on the surface of avocados sold at retail markets. A total of 450 samples (Persea americana var. Hass) were acquired from retail markets located in Guadalajara, Mexico. One group of 225 samples was evaluated for the presence of Salmonella and for enumeration of aerobic plate counts, yeasts and molds, Enterobacteriaceae, coliforms, and Escherichia coli. The other 225 samples were processed for isolation of L. monocytogenes and other Listeria species. Microbial counts (log CFU per avocado) were 4.3 to 9.0 for aerobic plate counts, 3.3 to 7.1 for yeasts and molds, 3.3 to 8.2 for Enterobacteriaceae, 3.3 to 8.4 for coliforms, and 3.3 to 6.2 for E. coli. Eight samples (3.5%) were positive for Salmonella. Listeria spp. and L. monocytogenes were detected in 31 (13.8%) and 18 (8.0%) of 225 samples, respectively. Listeria innocua, Listeria welshimeri, and Listeria grayi were isolated from 7.6, 1.3, and 0.9% of samples. These results indicate that avocados may carry countable levels of microorganisms and could be a vehicle for transmission of Salmonella and L. monocytogenes.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Salmonella / Contaminação de Alimentos / Persea / Frutas / Listeria monocytogenes País/Região como assunto: Mexico Idioma: En Revista: J Food Prot Ano de publicação: 2020 Tipo de documento: Article País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Salmonella / Contaminação de Alimentos / Persea / Frutas / Listeria monocytogenes País/Região como assunto: Mexico Idioma: En Revista: J Food Prot Ano de publicação: 2020 Tipo de documento: Article País de publicação: Estados Unidos