High Prevalence of Salmonella in Lymph Nodes and Tonsils of Swine Presented for Slaughter in Mexico

Byron D. Chaves, Henry Ruiz, Lyda G. Garcia, Alejandro Echeverry, Leslie Thompson, Markus F. Miller, Mindy M. Brashears

Biblographic citation: Food Protection Trends, vol. 37, no. 1, pp. 25-29, Jan 2017

Volume 37, Issue 1: Pages 25–29

Article Actions

This study reports the prevalence of culturepositive Salmonella in lymphoid tissues of swine presented for slaughter in two municipal abattoirs in Mexico. Fifty tonsils, and 110 mandibular, 90 mesenteric, and 115 subiliac lymph nodes (LNs), were recovered from 115 pork carcasses sampled across four days during a six-month period in a Merida harvest facility. Additionally, 10 mandibular LNs, 10 subiliac LNs, and 10 tonsils were recovered from 10 pork carcasses in a Cancun facility. The prevalence of Salmonella in the Merida facility was 18.0 (9/50), 12.7 (14/110), 44.4 (40/90), and 10.2% (12/115) for tonsils, mandibular, mesenteric, and subiliac LNs, respectively. In the Cancun abattoir, the prevalence was 40.0 (4/10), 20.0 (2/10), and 20.0% (2/10) for tonsils, mandibular, and mesenteric LNs, respectively. In Merida, values varied significantly across sampling days for all three LN types. These results verify that swine carry Salmonella systemically, posing a potential risk of cross-contamination of pork products for human consumption into which lymphoid tissues may be incorporated.

Subscribe Today

Subscribe to the Journal of Food Protection® and Food Protection Trends to stay up to date on the information you need, including scientific research and articles reporting on a variety of food safety and quality topics.

Request Permission to Reuse Content

This link will take you to the Copyright Clearance Center where you can submit a request to reuse IAFP’s content found in our publications. Please note that no part of any publications may be reproduced or transmitted in any form without prior permission from IAFP.

Request Permission