161 Research paper – Peeters – 2019 – Bacteriological evaluation of vaccination against Salmonella Typhimurium with an attenuated vaccine in subclinically infected pig herds

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161 Research paper – Peeters – 2019 – Bacteriological evaluation of vaccination against Salmonella Typhimurium with an attenuated vaccine in subclinically infected pig herds

Pathogen management \ Vaccination
Species targeted: Pigs;
Age: Young;Adult;
Summary:
Where to find the original material:
Country: BE
Subclinical infections with Salmonella Typhimurium occur frequently in pigs, constituting a risk for human salmonellosis. In this study, an attenuated Salmonella Typhimurium vaccine (Salmoporc®, IDT Biologika) was evaluated in three pig herds. The excretion of Salmonella Typhimurium field strain was low and similar between farms and production cycles. Vaccination of either sows and piglets, sows and fattening pigs, or in piglets only, resulted in a smaller number of lymph nodes positive at slaughter, in pigs in the second production cycle only (but not on first production cycle). Marked reduction of positive lymph nodes at slaughter happened after vaccination of sows and piglets. The vaccine strain was detected in the lymph nodes of 13 pigs at slaughter. Because of study limitations, results should be interpreted carefully. Nevertheless, in sows and piglets (preferred), sows and fattening pigs, and piglets only, vaccination can (to some extent) support the control of Salmonella Typhimurium infections.