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Evaluation of the Persistence and Characterization of Listeria monocytogenes in Foodservice Operations. Foods 2022; 11:foods11060886. [PMID: 35327308 PMCID: PMC8955912 DOI: 10.3390/foods11060886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/06/2022] [Accepted: 03/09/2022] [Indexed: 12/27/2022] Open
Abstract
Listeria monocytogenes is a major foodborne pathogen that can contaminate food products and colonize food-producing facilities. Foodservice operations (FSOp) are frequently responsible for foodborne outbreaks due to food safety practices failures. We investigated the presence of and characterized L. monocytogenes from two FSOp (cafeterias) distributing ready-to-eat meals and verified FSOp’s compliance with good manufacturing practices (GMP). Two facilities (FSOp-A and FSOp-B) were visited three times each over 5 months. We sampled foods, ingredients, and surfaces for microbiological analysis, and L. monocytogenes isolates were characterized by phylogenetic analyses and phenotypic characteristics. GMP audits were performed in the first and third visits. A ready-to-eat salad (FSOp-A) and a frozen ingredient (FSOp-B) were contaminated with L. monocytogenes, which was also detected on Zone 3 surfaces (floor, drains, and a boot cover). The phylogenetic analysis demonstrated that FSOp-B had persistent L. monocytogenes strains, but environmental isolates were not closely related to food or ingredient isolates. GMP audits showed that both operations worked under “fair” conditions, and “facilities and equipment” was the section with the least compliances. The presence of L. monocytogenes in the environment and GMP failures could promote food contamination with this pathogen, presenting a risk to consumers.
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Salamandane A, Silva AC, Brito L, Malfeito-Ferreira M. Microbiological assessment of street foods at the point of sale in Maputo (Mozambique). FOOD QUALITY AND SAFETY 2021. [DOI: 10.1093/fqsafe/fyaa030] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Abstract
Objectives
The aim of this study was to assess the microbiological quality and safety of street food sold in the main streets and informal markets of Maputo, the capital of Mozambique.
Materials and Methods
From 83 different vendors selling different types of foods, 83 samples of ready-to-eat (RTE) street food were analyzed. Mesophiles, Escherichia coli and total coliforms were used as quality and hygiene indicators. Listeria monocytogenes (L. monocytogenes) Salmonella and coagulase-positive staphylococci were used as food safety indicators.
Results
High proportions of unsatisfactory food samples were found in both traditional hot (76.7%) and cold (75%) foods. L. monocytogenes and Salmonella were tested negative in this survey. However, when coagulase-positive staphylococci was used as a food safety indicator, approximately 25% (23/83) of the food samples analyzed were classified as unsatisfactory/potentially hazardous.
Conclusions
These results, showing that street food sold in Maputo clearly requires adequate sanitary conditions for its preparation and sale, contribute to the development of good manufacturing practices (GMP) for street food in Maputo, Mozambique. This is the first report on the microbiological quality and safety of street food in Mozambique.
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Affiliation(s)
- Acácio Salamandane
- Linking Landscape, Environment, Agriculture and Food (LEAF) Research Centre, Instituto Superior de Agronomia, University of Lisbon, Lisbon, Portugal
- Faculdade de Ciências de Saúde, Universidade Lúrio, Bairro de Marrere, Nampula, Mozambique
| | - Ana Carla Silva
- Linking Landscape, Environment, Agriculture and Food (LEAF) Research Centre, Instituto Superior de Agronomia, University of Lisbon, Lisbon, Portugal
| | - Luísa Brito
- Linking Landscape, Environment, Agriculture and Food (LEAF) Research Centre, Instituto Superior de Agronomia, University of Lisbon, Lisbon, Portugal
| | - Manuel Malfeito-Ferreira
- Linking Landscape, Environment, Agriculture and Food (LEAF) Research Centre, Instituto Superior de Agronomia, University of Lisbon, Lisbon, Portugal
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FERRARI AM, OLIVEIRA JDSC, SÃO JOSÉ JFBD. Street food in Espírito Santo, Brazil: a study about good handling practices and food microbial quality. FOOD SCIENCE AND TECHNOLOGY 2021. [DOI: 10.1590/fst.31620] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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