Title
Prevalence, numbers and characteristics of Salmonella spp. on Irish retail pork
Date Issued
31 May 2009
Access level
metadata only access
Resource Type
journal article
Author(s)
University College Dublin
Abstract
Salmonella is a common contaminant of raw pork and represents a public health risk. Both qualitative and quantitative data on Salmonella in pork at retail are required for assessment of consumer exposure to the pathogen. Pork samples (n = 500) were collected at random from butchers' shops and supermarkets in the Republic of Ireland between January and November, 2007 and examined for prevalence and numbers of Salmonella using a PCR screen followed by cultural examination of positive samples. Salmonella numbers were assessed using a three tube most probable number (MPN) technique. Any Salmonella recovered were characterised by serotype, phage type and antibiogram, and subtyped by pulsed-field gel electrophoresis (PFGE). Enterobacteriaceae were also enumerated to see if there was a correlation between the Salmonella status of the pork and hygiene levels at retail outlets. Salmonella spp. were detected on 13/500 (2.6%) pork cuts at numbers between < 0.03 and 2.10 MPN/g. The mean Enterobacteriaceae counts was 3.12 log10 CFU/g (range - 0.26-6.52 log10 CFU/g). Salmonella Typhimurium was the most common serotype and the majority of isolates were multi antibiotic resistant. PFGE analysis showed evidence of persistence of some strains, with an S. Typhimurium U310 recovered from a pork abattoir being identical (100%) to a strain found a year later in a sample from a retail outlet. There was also evidence of cross contamination of Salmonella isolates between samples. There was a direct association between Salmonella contamination of pork and Enterobacteriaceae numbers, which indicates the need for good hygiene practices at retail for control of this pathogen. © 2009.
Start page
233
End page
239
Volume
131
Issue
March 2
Language
English
OCDE Knowledge area
Alimentos y bebidas
Subjects
Scopus EID
2-s2.0-64349103620
PubMed ID
Source
International Journal of Food Microbiology
ISSN of the container
01681605
Source funding
Food Institutional Research Measure
Sponsor(s)
This research has been carried out with the financial support of safe food, The Food Safety Promotion Board and the Food Institutional Research Measure (FIRM) administered by the Irish Department of Agriculture, Fisheries and Food. The co-operation and support of a stakeholder forum including regulatory authorities and the pork industry in the Republic and Northern Ireland is also gratefully acknowledged. Sincere thanks are due to the laboratory staff at the National Salmonella Reference Laboratory (NSRL), NUI, Galway, for carrying out serotyping, phage typing and antibiogram profiling. D.M. Prendergast and S.J. Duggan contributed equally to this work.
Sources of information:
Directorio de Producción CientÃfica
Scopus