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Journal of Clinical Microbiology, Jan 1995, 173-179, Vol 33, No. 1
Y Millemann, MC Lesage, E Chaslus-Dancla and JP Lafont
Seventy selected strains of Salmonella typhimurium and S. enteritidis
isolated from related poultry flocks in three independent geographical
areas were characterized by phenotypic and genotypic methods to compare the
usefulness of the methods in epidemiological studies. The 56 S. typhimurium
isolates were poorly discriminated by their biotypes, resistance patterns,
and plasmid profiles. Nine different ribotypes were obtained after DNA
digestion by BglII, PvuII, and SmaI. Seven IS200 types, characterized by
six to nine copies of IS200 on the chromosome, were detected after
digestion of genomic DNA by PstI. These studies resulted in the definition
of 15 clonal lineages distributed in three clusters. The 14 S. enteritidis
strains were not discriminated either by ribotyping or by detection of
IS200 (IS200 typing), but were separated on the basis of antibiotic
resistance and plasmid profiling. The stability of the insertion sequence
type was confirmed by inoculation of an S. typhimurium strain to axenic
chickens reared for 15 weeks in sterile isolators.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Value of plasmid profiling, ribotyping, and detection of IS200 for tracing avian isolates of Salmonella typhimurium and S. enteritidis
Institut National de la Recherche Agronomique, Centre de Tours- Nouzilly, Monnaie, France.
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