Salmonella Derby clonal spread from pork
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Updated: Aug 18, 2026

An Allelotyping PCR for Identifying Salmonella enterica serovars Enteritidis, Hadar, Heidelberg, and Typhimurium
Published on: July 22, 2011
Sylvia Valdezate1, Ana Vidal, Silvia Herrera-León
1Servicio de Bacteriologia C.N.M, Instituto de Salud Carlos III, Madrid, Spain. svaldezate@isciii.es
Abstract:
The genetic diversity of the Derby serotype of Salmonella enterica in Spain was examined by pulsed-field gel electrophoresis (PFGE). Out of 24 identified PFGE profiles, a major clone was detected in 19% of strains from humans, 52% from food, and 62% from swine. This clone (clone 1) was isolated from pork products, suggesting swine as its source.
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