Sub-iliac lymph nodes at slaughter lack ability to predict salmonella enterica prevalence for swine farms

Bing Wang, Irene V. Wesley, James D. McKean, Annette M. O'Connor

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The aim of this study was to assess the value of deep systemic sub-iliac lymph nodes collected at slaughter as predictors of Salmonella prevalence in live hogs. An observational study was conducted on 24 farms from September 2006 to February 2009. At least one cohort of market-weight pigs was visited for each farm. Within each cohort, 30 farm fecal samples on farm and 30 sub-iliac lymph nodes from matched pigs at slaughter were collected. Samples were cultured for Salmonella enterica and serotyped by conventional methods. Overall, 3.4% (51 of 1490) of farm feces and 0.06% (1 of 1739) of sub-iliac lymph nodes were Salmonella positive; 71.4% (15 of 21) of farms had at least one positive fecal sample, and 4.2% (1 of 24) had at least one positive sub-iliac lymph node. The median within-farm prevalence of Salmonella in farm fecal samples was 1.7%, ranging from 0% to 38.3%; for sub-iliac lymph nodes the median was 0%, ranging from 0% to 1.1%. The median within-cohort prevalence in farm fecal samples was 0%, ranging from 0% to 43.3%; for sub-iliac lymph nodes the median was 0%, ranging from 0% to 4%. The predominant serotype detected was Derby, followed by Anatum and Typhimurium (Copenhagen). Salmonella Braenderup was recovered from the sub-iliac lymph node. The low detection rate of Salmonella in sub-iliac lymph nodes (0.06%) limits its usefulness as a dependable predictor of Salmonella contamination originating on farm (3.4%).

Original languageEnglish (US)
Pages (from-to)795-800
Number of pages6
JournalFoodborne pathogens and disease
Volume7
Issue number7
DOIs
StatePublished - Jul 1 2010

Fingerprint

Salmonella enterica
lymph nodes
slaughter
Swine
Lymph Nodes
farms
swine
Salmonella
Salmonella Braenderup
sampling
Farms
observational studies
Feces
Observational Studies
serotypes
feces
markets
Weights and Measures

ASJC Scopus subject areas

  • Microbiology
  • Food Science
  • Applied Microbiology and Biotechnology
  • Animal Science and Zoology

Cite this

Sub-iliac lymph nodes at slaughter lack ability to predict salmonella enterica prevalence for swine farms. / Wang, Bing; Wesley, Irene V.; McKean, James D.; O'Connor, Annette M.

In: Foodborne pathogens and disease, Vol. 7, No. 7, 01.07.2010, p. 795-800.

Research output: Contribution to journalArticle

Wang, Bing ; Wesley, Irene V. ; McKean, James D. ; O'Connor, Annette M. / Sub-iliac lymph nodes at slaughter lack ability to predict salmonella enterica prevalence for swine farms. In: Foodborne pathogens and disease. 2010 ; Vol. 7, No. 7. pp. 795-800.
@article{31802a6c8b114987bf5a505c359ac137,
title = "Sub-iliac lymph nodes at slaughter lack ability to predict salmonella enterica prevalence for swine farms",
abstract = "The aim of this study was to assess the value of deep systemic sub-iliac lymph nodes collected at slaughter as predictors of Salmonella prevalence in live hogs. An observational study was conducted on 24 farms from September 2006 to February 2009. At least one cohort of market-weight pigs was visited for each farm. Within each cohort, 30 farm fecal samples on farm and 30 sub-iliac lymph nodes from matched pigs at slaughter were collected. Samples were cultured for Salmonella enterica and serotyped by conventional methods. Overall, 3.4{\%} (51 of 1490) of farm feces and 0.06{\%} (1 of 1739) of sub-iliac lymph nodes were Salmonella positive; 71.4{\%} (15 of 21) of farms had at least one positive fecal sample, and 4.2{\%} (1 of 24) had at least one positive sub-iliac lymph node. The median within-farm prevalence of Salmonella in farm fecal samples was 1.7{\%}, ranging from 0{\%} to 38.3{\%}; for sub-iliac lymph nodes the median was 0{\%}, ranging from 0{\%} to 1.1{\%}. The median within-cohort prevalence in farm fecal samples was 0{\%}, ranging from 0{\%} to 43.3{\%}; for sub-iliac lymph nodes the median was 0{\%}, ranging from 0{\%} to 4{\%}. The predominant serotype detected was Derby, followed by Anatum and Typhimurium (Copenhagen). Salmonella Braenderup was recovered from the sub-iliac lymph node. The low detection rate of Salmonella in sub-iliac lymph nodes (0.06{\%}) limits its usefulness as a dependable predictor of Salmonella contamination originating on farm (3.4{\%}).",
author = "Bing Wang and Wesley, {Irene V.} and McKean, {James D.} and O'Connor, {Annette M.}",
year = "2010",
month = "7",
day = "1",
doi = "10.1089/fpd.2009.0459",
language = "English (US)",
volume = "7",
pages = "795--800",
journal = "Foodborne Pathogens and Disease",
issn = "1535-3141",
publisher = "Mary Ann Liebert Inc.",
number = "7",

}

TY - JOUR

T1 - Sub-iliac lymph nodes at slaughter lack ability to predict salmonella enterica prevalence for swine farms

AU - Wang, Bing

AU - Wesley, Irene V.

AU - McKean, James D.

AU - O'Connor, Annette M.

PY - 2010/7/1

Y1 - 2010/7/1

N2 - The aim of this study was to assess the value of deep systemic sub-iliac lymph nodes collected at slaughter as predictors of Salmonella prevalence in live hogs. An observational study was conducted on 24 farms from September 2006 to February 2009. At least one cohort of market-weight pigs was visited for each farm. Within each cohort, 30 farm fecal samples on farm and 30 sub-iliac lymph nodes from matched pigs at slaughter were collected. Samples were cultured for Salmonella enterica and serotyped by conventional methods. Overall, 3.4% (51 of 1490) of farm feces and 0.06% (1 of 1739) of sub-iliac lymph nodes were Salmonella positive; 71.4% (15 of 21) of farms had at least one positive fecal sample, and 4.2% (1 of 24) had at least one positive sub-iliac lymph node. The median within-farm prevalence of Salmonella in farm fecal samples was 1.7%, ranging from 0% to 38.3%; for sub-iliac lymph nodes the median was 0%, ranging from 0% to 1.1%. The median within-cohort prevalence in farm fecal samples was 0%, ranging from 0% to 43.3%; for sub-iliac lymph nodes the median was 0%, ranging from 0% to 4%. The predominant serotype detected was Derby, followed by Anatum and Typhimurium (Copenhagen). Salmonella Braenderup was recovered from the sub-iliac lymph node. The low detection rate of Salmonella in sub-iliac lymph nodes (0.06%) limits its usefulness as a dependable predictor of Salmonella contamination originating on farm (3.4%).

AB - The aim of this study was to assess the value of deep systemic sub-iliac lymph nodes collected at slaughter as predictors of Salmonella prevalence in live hogs. An observational study was conducted on 24 farms from September 2006 to February 2009. At least one cohort of market-weight pigs was visited for each farm. Within each cohort, 30 farm fecal samples on farm and 30 sub-iliac lymph nodes from matched pigs at slaughter were collected. Samples were cultured for Salmonella enterica and serotyped by conventional methods. Overall, 3.4% (51 of 1490) of farm feces and 0.06% (1 of 1739) of sub-iliac lymph nodes were Salmonella positive; 71.4% (15 of 21) of farms had at least one positive fecal sample, and 4.2% (1 of 24) had at least one positive sub-iliac lymph node. The median within-farm prevalence of Salmonella in farm fecal samples was 1.7%, ranging from 0% to 38.3%; for sub-iliac lymph nodes the median was 0%, ranging from 0% to 1.1%. The median within-cohort prevalence in farm fecal samples was 0%, ranging from 0% to 43.3%; for sub-iliac lymph nodes the median was 0%, ranging from 0% to 4%. The predominant serotype detected was Derby, followed by Anatum and Typhimurium (Copenhagen). Salmonella Braenderup was recovered from the sub-iliac lymph node. The low detection rate of Salmonella in sub-iliac lymph nodes (0.06%) limits its usefulness as a dependable predictor of Salmonella contamination originating on farm (3.4%).

UR - http://www.scopus.com/inward/record.url?scp=77954499979&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77954499979&partnerID=8YFLogxK

U2 - 10.1089/fpd.2009.0459

DO - 10.1089/fpd.2009.0459

M3 - Article

VL - 7

SP - 795

EP - 800

JO - Foodborne Pathogens and Disease

JF - Foodborne Pathogens and Disease

SN - 1535-3141

IS - 7

ER -