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Related Experiment Videos

Field observations with Salmonella enteritidis bacterins.

S Davison1, C E Benson, D J Henzler

  • 1Laboratory of Avian Medicine and Pathology, School of Veterinary Medicine, University of Pennsylvania, Kennett Square 19348, USA.

Avian Diseases
|December 28, 1999
PubMed
Summary

Salmonella enteritidis bacterins showed limited efficacy in commercial layer flocks. Vaccination did not prevent environmental or organ infections, indicating challenges in controlling Salmonella enteritidis in poultry.

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Area of Science:

  • Veterinary immunology
  • Poultry health
  • Food safety

Background:

  • Salmonella enteritidis is a significant pathogen in commercial poultry.
  • Effective control strategies are crucial for preventing foodborne illnesses.
  • Bacterins are commonly used for Salmonella enteritidis vaccination in layer flocks.

Purpose of the Study:

  • To evaluate the efficacy of Salmonella enteritidis bacterins in commercial layer flocks.
  • To assess the impact of vaccination on S. enteritidis presence in the environment, bird organs, and eggs.

Main Methods:

  • Conducted a study with 11 commercial layer flocks.
  • Utilized autogenous or federally licensed S. enteritidis bacterins.
  • Monitored S. enteritidis presence through environmental, rodent, organ, and egg cultures throughout flock life.

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Main Results:

  • Despite vaccination, 63.6% of houses had S. enteritidis-positive environmental cultures.
  • 100% of vaccinated flocks had S. enteritidis-positive organ cultures.
  • Vaccinated birds showed S. enteritidis organ positivity between 10-40%; unvaccinated groups had similar results.

Conclusions:

  • Salmonella enteritidis bacterins demonstrated limited efficacy in reducing S. enteritidis in vaccinated layer flocks.
  • Vaccination did not prevent environmental contamination or organ colonization.
  • Further research is needed to improve Salmonella enteritidis control strategies in poultry.