PMID: 8972091Dec 1, 1996Paper

The incidence and level of Listeria monocytogenes contamination of food sources at primary production and initial processing

The Journal of Applied Bacteriology
D R FenlonW Donachie

Abstract

Listeria monocytogenes was isolated in low numbers from a variety of environmental samples associated with the primary production of food, including vegetation, faeces and meat. The organism was rarely detected on growing grass and vegetables prior to processing. The excretion of L. monocytogenes by farm animals was linked to their diet, with animals fed entirely on hay or manufactured diets not excreting detectable levels of Listeria (i.e. absence in 25 g). However, animals fed on silage, which is frequently contaminated with L. monocytogenes, commonly excreted the organism. Transport of live animals over long distances (> 100 km) significantly increased the level of excretion of Listeria, but the contamination of carcasses of sheep and cattle was not high. Pigs and poultry faeces were free of Listeria prior to slaughter and pig carcasses were not found to have Listeria present. Frozen and chilled chicken did show detectable levels reflecting the greater potential for contamination during poultry processing. Samples of minced beef were tested and 21 of 23 samples were positive for L. monocytogenes, demonstrating that processing significantly increases the level of contamination compared to whole carcasses. Multilocus enzyme el...Continue Reading

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Citations

Jun 19, 2013·Folia Microbiologica·Barbara SzymczakWaldemar Dąbrowski
Jun 4, 2005·Comparative Immunology, Microbiology and Infectious Diseases·Eiji YokoyamaYasuji Katsube
Aug 18, 2000·International Journal of Food Microbiology·S InoueS Kumagai
Jan 5, 2002·International Journal of Food Microbiology·M A McMahon, I G Wilson
Nov 19, 2003·International Journal of Food Microbiology·Roger StephanMarzena Anna Zychowska
Jan 31, 2004·International Journal of Food Microbiology·V AguadoI García-Jalón
Jan 31, 2004·International Journal of Food Microbiology·A I Vitas, V Aguado e I Garcia-Jalon
Dec 22, 1999·International Journal of Food Microbiology·M UyttendaeleJ Debevere
Apr 17, 2012·Applied and Environmental Microbiology·Brian D SaudersMartin Wiedmann
Aug 6, 2004·Applied and Environmental Microbiology·K K NightingaleM Wiedmann
May 12, 2001·Infection and Immunity·K A RemerS L Leib
Mar 6, 2010·Interdisciplinary Perspectives on Infectious Diseases·Anna OevermannMarc Vandevelde
Aug 9, 2003·Letters in Applied Microbiology·A PeccioM Trevisani
Oct 13, 2006·Letters in Applied Microbiology·Xiaohui Zhou, Xinan Jiao
Sep 14, 2007·Journal of Applied Microbiology·D M PrendergastJ J Sheridan
Mar 4, 2020·FEMS Microbiology Letters·Catarina M MarinhoPascal Piveteau

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