Salmonella and other Enterobacteriaceae in conventional and organic vegetables grown in Brazilian farms.

Autor: Padovani NFA; Department of Agri-Food Industry, Food and Nutrition, Luiz de Queiroz' College of Agriculture, University of Sao Paulo, Av. Pádua Dias, 11, Piracicaba, SP, CP9, 13418-900, Brazil., Santos TS; Department of Agri-Food Industry, Food and Nutrition, Luiz de Queiroz' College of Agriculture, University of Sao Paulo, Av. Pádua Dias, 11, Piracicaba, SP, CP9, 13418-900, Brazil., Almeida P; Department of Agri-Food Industry, Food and Nutrition, Luiz de Queiroz' College of Agriculture, University of Sao Paulo, Av. Pádua Dias, 11, Piracicaba, SP, CP9, 13418-900, Brazil., Dias M; Dempster MS Lab, Department of Chemical Engineering, Polytechnic School, University of Sao Paulo, Sao Paulo, SP, Brazil., Mendes MA; Dempster MS Lab, Department of Chemical Engineering, Polytechnic School, University of Sao Paulo, Sao Paulo, SP, Brazil., Cesar ASM; Department of Agri-Food Industry, Food and Nutrition, Luiz de Queiroz' College of Agriculture, University of Sao Paulo, Av. Pádua Dias, 11, Piracicaba, SP, CP9, 13418-900, Brazil., Maffei DF; Department of Agri-Food Industry, Food and Nutrition, Luiz de Queiroz' College of Agriculture, University of Sao Paulo, Av. Pádua Dias, 11, Piracicaba, SP, CP9, 13418-900, Brazil. danielemaffei@usp.br.; Food Research Center (FoRC-CEPID), Sao Paulo, SP, Brazil. danielemaffei@usp.br.
Jazyk: angličtina
Zdroj: Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] [Braz J Microbiol] 2023 Jun; Vol. 54 (2), pp. 1055-1064. Date of Electronic Publication: 2023 Feb 22.
DOI: 10.1007/s42770-023-00934-2
Abstrakt: This study aimed to assess the microbiological profile of conventional and organic vegetables grown in Brazilian farms through the detection of Salmonella and other Enterobacteriaceae. A total of 200 samples (100 conventional and 100 organic), including leafy greens, spices/herbs, and other unusual vegetables, were submitted to the enumeration of Enterobacteriaceae by plating on VRBG agar. Moreover, colonies of Enterobacteriaceae were randomly selected and submitted to identification by MALDI-TOF MS. Samples were also tested for Salmonella, using culture-based and PCR-based enrichment methods. The mean counts of Enterobacteriaceae in conventional and organic vegetables were 5.1 ± 1.5 and 5.4 ± 1.4 log CFU/g, respectively (P > 0.05). A total of 18 genera (including 38 species) of Enterobacteriaceae were identified, and the most frequent ones found in samples from both farming systems were Enterobacter (76%) and Pantoea (68%). Salmonella was identified in 17 samples (8.5%): nine (4.5%) in conventional and eight (4.0%) in organic vegetables. These results indicate that the farming system had no impact on the Enterobacteriaceae populations and rates of Salmonella and revealed unsatisfactory microbiological safety of some samples, mainly due to the presence of Salmonella. These findings highlight the need for control measures during vegetable production, regardless of the farming system, to reduce microbial contamination and the risks of foodborne illnesses.
(© 2023. The Author(s) under exclusive licence to Sociedade Brasileira de Microbiologia.)
Databáze: MEDLINE
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