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Master's Dissertation
DOI
https://doi.org/10.11606/D.10.2024.tde-24042024-154329
Document
Author
Full name
Rodrigo Cesar Pedro
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2023
Supervisor
Committee
Balian, Simone de Carvalho (President)
Boanova, Andréa Barbosa
Prist, Ricardo
Title in Portuguese
Patógenos veiculados por alimentos em eventos de massa
Keywords in Portuguese
Listeria spp
Eventos de massa
Segurança dos alimentos
Abstract in Portuguese
Este estudo surgiu diante da necessidade de identificar os microrganismos patogênicos, e relacioná-los com a segurança dos alimentos comercializados em eventos de massa. Para tal problemática, foi coletado uma série de alimentos consumidos em diferentes eventos de massa e, em períodos diferentes de coleta. Neste caso, buscou-se identificar a presença de Salmonella spp., Listeria spp., Campylobacter spp. e Vibrio spp. e correlacionar a presença do patógeno e o tempo de exposição do alimento ao consumo. Também foram analisados quanto a sensibilidade dos microrganismos encontrados nas amostras aos antimicrobianos convencionais. Das 188 amostras analisadas, 29 (15,4%) foram positivas para Listeria spp., sendo que os fornecedores que não estavam em conformidade com a segurança dos alimentos possuem os maiores índices de contaminação. Os principais alimentos contaminados incluíram produtos à base de carne bovina, seguido de pescados. Das amostras contaminadas, 15 delas foram positivas para Listeria monocytogenes (51,5%), seguida por Listeria innocua (44,8%), Listeria. welshimeri (13,8%) e L. seeligeri (6,9%). Considerando o horário de coleta, foi observado que 46,7% das amostras contaminadas com Listeria monocytogenes foram obtidas no final dos respectivos eventos. Conclui-se que a implementação das boas práticas de higiene e manipulação de alimentos desempenha um papel fundamental na redução da contaminação e ocorrência de patógenos nos alimentos em geral, incluindo-se aqueles comercializados em eventos de massa.
Title in English
Foodborne pathogens at mass event
Keywords in English
Listeria spp
Food safety
Mass events
Abstract in English
This present study arose due to the necessity to identify pathogenic microorganisms and relate them to the safety of foods sold at mass events. For this problem, a series of foods consumed in different mass events and at different collection periods were collected. In this case, we sought to identify the presence of Salmonella spp., Listeria spp., Campylobacter spp. and Vibrio spp. and correlate the presence of the pathogen and the time of exposure of the food to consumption. They were also analyzed for the sensitivity of the microorganisms found in the samples to conventional antimicrobials. Of the 188 samples analyzed, 29 (15.4%) were positive for Listeria spp., with suppliers that were not in compliance with food safety having the highest contamination rates. The main contaminated foods included beef products, followed by fish. Of the contaminated samples, 15 of them were positive for Listeria monocytogenes (51.5%), followed by Listeria innocua (44.8%), Listeria. welshimeri (13.8%) and L. seeligeri (6.9%). Considering the collection time, it was observed that 46.7% of samples contaminated with Listeria monocytogenes were obtained at the end of the respective events. It is concluded that the implementation of significant hygiene control and food handling practices plays a crucial role in reducing contamination and the occurrence of pathogens in foods in general, including those sold at mass events.
 
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Publishing Date
2024-05-20
 
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