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. 2020 Oct 18;8(10):1602.
doi: 10.3390/microorganisms8101602.

A Preliminary Study on the Presence of Salmonella in Lymph Nodes of Sows at Processing Plants in the United States

Roger B Harvey  1 , Keri N Norman  2 , Robin C Anderson  1 , David J Nisbet  1
Affiliations

A Preliminary Study on the Presence of Salmonella in Lymph Nodes of Sows at Processing Plants in the United States

Roger B Harvey et al. Microorganisms. .

Abstract

Salmonella-contaminated lymph nodes (LN), when included into edible meat products, are a potential source of Salmonella foodborne disease. In this survey, ventral superficial cervical and mandibular LN were tested for the presence of Salmonella from two sow processing plants in the midwestern United States. Results indicate that both LN can be contaminated with Salmonella; mandibular LN have higher prevalence (p < 0.05) of Salmonella than cervical LN (16% vs. 0.91%), and the majority (>90%) of Salmonella isolates are pan-susceptible or resistant to one antimicrobial, while 9.78% of isolates were multi-drug-resistant (MDR-resistant to three or more classes of antimicrobials). Intervention methods to prevent foodborne disease could include elimination of these LN from pork products or inclusion of LN only into products that are destined for cooking. Integrated multi-faceted intervention methods need to be developed to reduce Salmonella in the food chain.

Keywords: Salmonella; antimicrobial resistance; lymph nodes; pork; prevalence; sows.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Prevalence of Salmonella in lymph nodes of sows at processing.
See this image and copyright information in PMC

References

    1. Havelaar A.H., Kirk M.D., Torgerson P.R., Gibb H.J., Hald T., Lake R.J., Praet N., Bellinger D.C., De Silva N.R., Gargouri N., et al. World Health Organization Global Estimates and Regional Comparisons of the Burden of Foodborne Disease in 2010. PLoS Med. 2015;12:e1001923. doi: 10.1371/journal.pmed.1001923. - DOI - PMC - PubMed
    1. Centers for Disease Control (CDC) Reports of Selected Salmonella Outbreak Investigations. 4 May 2020. [(accessed on 4 August 2020)]; Available online: https//www.cdc.gov./Salmonella/outbreaks.html.
    1. Arthur T.M., Guerini M.N., Kalchayanand N., Wells J.E., Shackelford S.D., Wheeler T.L., Koohmaraie M. Prevalence and characterization of Salmonella in bovine lymph nodes potentially destined for use in ground beef. J. Food Prot. 2008;71:1685–1688. doi: 10.4315/0362-028X-71.8.1685. - DOI - PubMed
    1. Brown T.R., Edrington T.S., Loneragan G.H., Hanson K.L., Malin K., Ison J.J., Nisbet D.J. Possible differences in Salmonella prevalence in the peripheral lymph nodes of cattle derived from distinct production systems and of different breed types. J. Food Prot. 2015;78:2081–2084. doi: 10.4315/0362-028X.JFP-15-198. - DOI - PubMed
    1. Gragg S.E., Loneragan G.H., Brashears M.M., Arthur T.M., Bosilevac J.M., Kalchayanand N., Wang R., Schmidt J.W., Brooks J.C., Shackelford S.D., et al. Cross-sectional study examining Salmonella enterica carriage in subiliac lymph nodes of cull and feedlot cattle at harvest. Foodborne Pathog. Dis. 2013;10:368–374. doi: 10.1089/fpd.2012.1275. - DOI - PMC - PubMed

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