Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/10823
Title: Assessment of Microbiological Contamination of Fresh, Minimally Processed, and Ready-to-Eat Lettuces (Lactuca sativa), Rio de Janeiro State, Brazil
Authors: Brandão, Marcelo L.L.
Almeida, Davi O.
Bispo, Fernanda C. P.
Bricio, Silvia M. L.
Marin, Victor A.
Miagostovich, Marize P.
Affilliation: Fundação Oswaldo Cruz. Instituto Nacional de Controle de Qualidade em Saúde. Departamento de Microbiologia. Laboratório de Produtos. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Nacional de Controle de Qualidade em Saúde. Departamento de Microbiologia. Laboratório de Produtos. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Nacional de Controle de Qualidade em Saúde. Departamento de Microbiologia. Laboratório de Produtos. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Nacional de Controle de Qualidade em Saúde. Departamento de Microbiologia. Laboratório de Produtos. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Nacional de Controle de Qualidade em Saúde. Departamento de Microbiologia. Laboratório de Produtos. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Virologia Comparada e Ambiental. Rio de Janeiro, RJ, Brasil.
Abstract: This study aimed to assess the microbiological contamination of lettuces commercialized in Rio de Janeiro, Brazil, in order to investigate detection of norovirus genogroup II (NoV GII), Salmonella spp., total and fecal coliforms, such as Escherichia coli. For NoV detection samples were processed using the adsorption-elution concentration method associated to real-time quantitative polymerase chain reaction (qPCR). A total of 90 samples of lettuce including 30 whole fresh lettuces, 30 minimally processed (MP) lettuces, and 30 raw ready-to-eat (RTE) lettuce salads were randomly collected from different supermarkets (fresh and MP lettuce samples), food services, and self-service restaurants (RTE lettuce salads), all located in Rio de Janeiro, Brazil, from October 2010 to December 2011. NoV GII was not detected and PP7 bacteriophage used as internal control process (ICP) was recovered in 40.0%, 86.7%, and 76.7% of those samples, respectively. Salmonella spp. was not detected although fecal contamination has been observed by fecal coliform concentrations higher than 102 most probable number/g. E. coli was detected in 70.0%, 6.7%, and 30.0% of fresh, MP, and RTE samples, respectively. This study highlights the need to improve hygiene procedures at all stages of vegetable production and to show PP7 bacteriophage as an ICP for recovering RNA viruses’ methods from MP and RTE lettuce samples, encouraging the evaluation of new protocols that facilitate the establishment of methodologies for NoV detection in a greater number of food microbiology laboratories.
Keywords: Bacterial contamination
Internal control
Norovirus
RT-PCR
DeCS: Norovirus
Contaminação
Bactérias
Issue Date: 2014
Publisher: Wiley Online Library
Citation: BRANDÃO, Marcelo L. L. et al. Assessment of Microbiological Contamination of Fresh, Minimally Processed, and Ready-to-Eat Lettuces (Lactuca sativa), Rio de Janeiro State, Brazil. Journal of Food Science, v.79, n.5, p.M961-M966, 2014.
DOI: 10.1111/1750-3841.12459
ISSN: 1750-3841
Copyright: open access
Appears in Collections:INCQS - Artigos de Periódicos
IOC - Artigos de Periódicos

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