Competitive exclusion of Salmonella Enteritidis by Salmonella Gallinarum in poultry

Wolfgang Rabsch, Billy M. Hargis, Renee M Tsolis, Robert A. Kingsley, Karl Heinz Hinz, Helmut Tschäpe, Andreas J Baumler

Research output: Contribution to journalArticlepeer-review

85 Scopus citations


Salmonella Enteritidis emerged as a major egg-associated pathogen in the late 20th century. Epidemiologic data from England, Wales, and the United States indicate that S. Enteritidis filled the ecologic niche vacated by eradication of S. Gallinarum from poultry, leading to an epidemic increase in human infections. We tested this hypothesis by retrospective analysis of epidemiologic surveys in Germany and demonstrated that the number of human S. Enteritidis cases is inversely related to the prevalence of S. Gallinarum in poultry. Mathematical models combining epidemiology with population biology suggest that S. Gallinarum competitively excluded S. Enteritidis from poultry flocks early in the 20th century.

Original languageEnglish (US)
Pages (from-to)443-448
Number of pages6
JournalEmerging Infectious Diseases
Issue number5
StatePublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • Microbiology (medical)


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