Inactivation of extraintestinal pathogenic E. coli clinical and food isolates suspended in ground chicken meat by gamma radiation.
Food Microbiol
; 84: 103264, 2019 Dec.
Article
em En
| MEDLINE
| ID: mdl-31421757
ABSTRACT
Extraintestinal pathogenic Escherichia coli are common contaminants in retail poultry and involved inflammatory bowel disease, urinary tract infections and meningitis in both animals and humans. They cause significantly more illnesses and deaths in humans than Shiga toxin-producing E. coli (STEC). Ionizing radiation is used commercially for improving the safety and shelf-life of foods. In this study we inoculated ground chicken meat with 25 individual isolates of clinical uropathogenic E. coli (UPEC) and newborn meningitis causing E. coli (NMEC), isolates from retail chicken meat (CM), as well as retail chicken-skin isolates identified in our laboratory (CS). We then determined their gamma radiation inactivation kinetics (D10-value). The mean D10-value for all isolates (nâ¯=â¯25) was 0.30â¯kGy. The mean D10-value for the UPEC, NMEC, CM, and CS isolates were 0.25, 0.29, 0.29, and 0.39â¯kGy, respectively. The mean D10-value for the clinical isolates was 0.27â¯kGy vs. 0.34â¯kGy for the non-clinical isolates. There was no correlation between presence of virulence factors, antibiotic resistance, and radiation resistance. ExPEC were similar to that of STEC which were previously evaluated in our laboratory. The radiation doses needed to kill STEC poultry meat should also kill ExPEC.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Produtos Avícolas
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Viabilidade Microbiana
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Escherichia coli Extraintestinal Patogênica
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Irradiação de Alimentos
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Raios gama
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article