Assessing the effectiveness of on-farm and abattoir interventions in reducing pig-meat borne Salmonellosis within EU member states

Andrew A. Hill, Robin L. Simons, Arno N. Swart, Louise Kelly, Tine Hald, Emma L. Snary

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

As part of the evidence base for the development of National Control Plans for Salmonella spp. in pigs for EU Member States, a Quantitative Microbiological Risk Assessment was funded to support the scientific opinion required by the EC from the European Food Safety Authority. The main aim of the risk assessment was to assess the effectiveness of interventions implemented on-farm and at the abattoir in reducing human cases of pig meat borne salmonellosis, and how the effects of these interventions may vary across EU Member States. Two case study Member States have been chosen to assess the effect of the interventions investigated. Reducing both breeding herd and slaughter pig prevalence were effective in achieving reductions in the number of expected human illnesses in both case study Member States. However, there is scarce evidence to suggest which specific on-farm interventions could achieve consistent reductions in either breeding herd or slaughter pig prevalence. Hypothetical reductions in feed contamination rates were important in reducing slaughter pig prevalence for the case study Member State where prevalence of infection was already low, but not for the high-prevalence case study.
The most significant reductions were achieved by a 1- or 2-log decrease of Salmonella contamination of the carcass post- evisceration; a 1-log decrease in average contamination produced a 90% reduction in human illness. The intervention analyses suggest that abattoir intervention may be the most effective way to reduce human exposure to Salmonella spp. However, a combined farm/abattoir approach would likely have cumulative benefits. On-farm intervention is probably most effective at the breeding herd level for high-prevalence Member States; once infection in the breeding herd has been reduced to a low enough level, then feed and biosecurity measures would become increasingly more effective.
LanguageEnglish
Pages545-560
Number of pages16
JournalRisk Analysis
Volume36
Issue number3
DOIs
Publication statusPublished - 2016

Fingerprint

Abattoirs
Meats
Salmonella Infections
Meat
Farms
Swine
Salmonella
Breeding
Contamination
Risk assessment
Cross-Sectional Studies
Food safety
Food Safety
Infection

Keywords

  • risk assessment
  • inteventions
  • pigs
  • salmonella

Cite this

Hill, Andrew A. ; Simons, Robin L. ; Swart, Arno N. ; Kelly, Louise ; Hald, Tine ; Snary, Emma L. / Assessing the effectiveness of on-farm and abattoir interventions in reducing pig-meat borne Salmonellosis within EU member states. In: Risk Analysis. 2016 ; Vol. 36, No. 3. pp. 545-560.
@article{ec72553e27ac4d9fa698c28115170794,
title = "Assessing the effectiveness of on-farm and abattoir interventions in reducing pig-meat borne Salmonellosis within EU member states",
abstract = "As part of the evidence base for the development of National Control Plans for Salmonella spp. in pigs for EU Member States, a Quantitative Microbiological Risk Assessment was funded to support the scientific opinion required by the EC from the European Food Safety Authority. The main aim of the risk assessment was to assess the effectiveness of interventions implemented on-farm and at the abattoir in reducing human cases of pig meat borne salmonellosis, and how the effects of these interventions may vary across EU Member States. Two case study Member States have been chosen to assess the effect of the interventions investigated. Reducing both breeding herd and slaughter pig prevalence were effective in achieving reductions in the number of expected human illnesses in both case study Member States. However, there is scarce evidence to suggest which specific on-farm interventions could achieve consistent reductions in either breeding herd or slaughter pig prevalence. Hypothetical reductions in feed contamination rates were important in reducing slaughter pig prevalence for the case study Member State where prevalence of infection was already low, but not for the high-prevalence case study. The most significant reductions were achieved by a 1- or 2-log decrease of Salmonella contamination of the carcass post- evisceration; a 1-log decrease in average contamination produced a 90{\%} reduction in human illness. The intervention analyses suggest that abattoir intervention may be the most effective way to reduce human exposure to Salmonella spp. However, a combined farm/abattoir approach would likely have cumulative benefits. On-farm intervention is probably most effective at the breeding herd level for high-prevalence Member States; once infection in the breeding herd has been reduced to a low enough level, then feed and biosecurity measures would become increasingly more effective.",
keywords = "risk assessment, inteventions, pigs, salmonella",
author = "Hill, {Andrew A.} and Simons, {Robin L.} and Swart, {Arno N.} and Louise Kelly and Tine Hald and Snary, {Emma L.}",
year = "2016",
doi = "10.1111/risa.12568",
language = "English",
volume = "36",
pages = "545--560",
journal = "Risk Analysis",
issn = "0272-4332",
number = "3",

}

Assessing the effectiveness of on-farm and abattoir interventions in reducing pig-meat borne Salmonellosis within EU member states. / Hill, Andrew A.; Simons, Robin L.; Swart, Arno N.; Kelly, Louise; Hald, Tine; Snary, Emma L.

In: Risk Analysis, Vol. 36, No. 3, 2016, p. 545-560.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Assessing the effectiveness of on-farm and abattoir interventions in reducing pig-meat borne Salmonellosis within EU member states

AU - Hill, Andrew A.

AU - Simons, Robin L.

AU - Swart, Arno N.

AU - Kelly, Louise

AU - Hald, Tine

AU - Snary, Emma L.

PY - 2016

Y1 - 2016

N2 - As part of the evidence base for the development of National Control Plans for Salmonella spp. in pigs for EU Member States, a Quantitative Microbiological Risk Assessment was funded to support the scientific opinion required by the EC from the European Food Safety Authority. The main aim of the risk assessment was to assess the effectiveness of interventions implemented on-farm and at the abattoir in reducing human cases of pig meat borne salmonellosis, and how the effects of these interventions may vary across EU Member States. Two case study Member States have been chosen to assess the effect of the interventions investigated. Reducing both breeding herd and slaughter pig prevalence were effective in achieving reductions in the number of expected human illnesses in both case study Member States. However, there is scarce evidence to suggest which specific on-farm interventions could achieve consistent reductions in either breeding herd or slaughter pig prevalence. Hypothetical reductions in feed contamination rates were important in reducing slaughter pig prevalence for the case study Member State where prevalence of infection was already low, but not for the high-prevalence case study. The most significant reductions were achieved by a 1- or 2-log decrease of Salmonella contamination of the carcass post- evisceration; a 1-log decrease in average contamination produced a 90% reduction in human illness. The intervention analyses suggest that abattoir intervention may be the most effective way to reduce human exposure to Salmonella spp. However, a combined farm/abattoir approach would likely have cumulative benefits. On-farm intervention is probably most effective at the breeding herd level for high-prevalence Member States; once infection in the breeding herd has been reduced to a low enough level, then feed and biosecurity measures would become increasingly more effective.

AB - As part of the evidence base for the development of National Control Plans for Salmonella spp. in pigs for EU Member States, a Quantitative Microbiological Risk Assessment was funded to support the scientific opinion required by the EC from the European Food Safety Authority. The main aim of the risk assessment was to assess the effectiveness of interventions implemented on-farm and at the abattoir in reducing human cases of pig meat borne salmonellosis, and how the effects of these interventions may vary across EU Member States. Two case study Member States have been chosen to assess the effect of the interventions investigated. Reducing both breeding herd and slaughter pig prevalence were effective in achieving reductions in the number of expected human illnesses in both case study Member States. However, there is scarce evidence to suggest which specific on-farm interventions could achieve consistent reductions in either breeding herd or slaughter pig prevalence. Hypothetical reductions in feed contamination rates were important in reducing slaughter pig prevalence for the case study Member State where prevalence of infection was already low, but not for the high-prevalence case study. The most significant reductions were achieved by a 1- or 2-log decrease of Salmonella contamination of the carcass post- evisceration; a 1-log decrease in average contamination produced a 90% reduction in human illness. The intervention analyses suggest that abattoir intervention may be the most effective way to reduce human exposure to Salmonella spp. However, a combined farm/abattoir approach would likely have cumulative benefits. On-farm intervention is probably most effective at the breeding herd level for high-prevalence Member States; once infection in the breeding herd has been reduced to a low enough level, then feed and biosecurity measures would become increasingly more effective.

KW - risk assessment

KW - inteventions

KW - pigs

KW - salmonella

UR - http://onlinelibrary.wiley.com/journal/10.1111/%28ISSN%291539-6924

U2 - 10.1111/risa.12568

DO - 10.1111/risa.12568

M3 - Article

VL - 36

SP - 545

EP - 560

JO - Risk Analysis

T2 - Risk Analysis

JF - Risk Analysis

SN - 0272-4332

IS - 3

ER -