Genetic and phenotypic variability among Salmonella enterica serovar typhimurium isolates from California dairy cattle and humans

John M Adaska, A. J. Silva, A. C B Berge, W. M. Sischo

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Fifty-six human and 24 adult dairy cattle isolates of Salmonella enterica serovar Typhimurium from a single county in California were compared using ribotyping, insertion sequence typing (IS200), pulsed-fleld gel electrophoresis, plasmid typing, phage typing, and antimicrobial resistance testing. The majority of the isolates fell into one of two groups which were phage types DT104 and DT193. Combining the information from all typing methods, a total of 45 different "clusters" were defined, with 35 of those including only a single isolate. The library of isolates had a high degree of variability, but antibiotic resistance and plasmid typing each defined single clusters in which human or bovine isolates predominated (χ2, P < 0.05).

Original languageEnglish (US)
Pages (from-to)6632-6637
Number of pages6
JournalApplied and Environmental Microbiology
Volume72
Issue number10
DOIs
StatePublished - Oct 2006

ASJC Scopus subject areas

  • Environmental Science(all)
  • Biotechnology
  • Microbiology

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