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Epidemiol Infect ; 149: e178, 2021 08 10.
Artigo em Inglês | MEDLINE | ID: mdl-34635196

RESUMO

In October 2019, public health surveillance systems in Scotland identified an increase in the number of reported infections of Shiga toxin-producing Escherichia coli (STEC) O26:H11 involving bloody diarrhoea. Ultimately, across the United Kingdom (UK) 32 cases of STEC O26:H11 stx1a were identified, with the median age of 27 years and 64% were male; six cases were hospitalised. Among food exposures there was an association with consuming pre-packed sandwiches purchased at outlets belonging to a national food chain franchise (food outlet A) [odds ratio (OR) = 183.89, P < 0.001]. The common ingredient identified as a component of the majority of the sandwiches sold at food outlet A was a mixed salad of Apollo and Iceberg lettuce and spinach leaves. Microbiological testing of food and environmental samples were negative for STEC O26:H11, although STEC O36:H19 was isolated from a mixed salad sample taken from premises owned by food outlet A. Contamination of fresh produce is often due to a transient event and detection of the aetiological agent in food that has a short-shelf life is challenging. Robust, statistically significant epidemiological analysis should be sufficient evidence to direct timely and targeted on-farm investigations. A shift in focus from testing the microbiological quality of the produce to investigating the processes and practices through the supply chain and sampling the farm environment is recommended.


Assuntos
Surtos de Doenças , Infecções por Escherichia coli/epidemiologia , Fast Foods/microbiologia , Doenças Transmitidas por Alimentos/epidemiologia , Escherichia coli Shiga Toxigênica/isolamento & purificação , Adulto , Diarreia/epidemiologia , Diarreia/microbiologia , Monitoramento Epidemiológico , Infecções por Escherichia coli/microbiologia , Fast Foods/intoxicação , Fast Foods/provisão & distribuição , Feminino , Doenças Transmitidas por Alimentos/microbiologia , Genoma Bacteriano/genética , Humanos , Masculino , Saladas/microbiologia , Saladas/intoxicação , Saladas/provisão & distribuição , Sorogrupo , Toxina Shiga/genética , Escherichia coli Shiga Toxigênica/genética , Reino Unido/epidemiologia
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