Pulsed-field gel electrophoresis of Salmonella enterica.

Pulsed-field gel electrophoresis (PFGE) is considered a "gold standard" for the molecular characterization of a number of bacterial strains. Its strength relies on its high discriminatory power, together with its high reproducibility. For many years, an international network, PulseNet International, allows the rapid comparison of PFGE data obtained all over the world, and it provides a valuable tool to promptly recognize the epidemiological dynamics of many pathogens, including Salmonella enterica.

Resistance genes, phage types and pulsed field gel electrophoresis pulsotypes in Salmonella enterica strains from laying hen farms in southern Italy.

Twenty-four Salmonella enterica isolates (13 serovar Enteritidis and 11 Typhimurium) isolated from 5,600 samples from intensive laying hen farms in Italy in 1998-2007 were characterized for antimicrobial resistance genes, pulsotype and phage type. Most of S. Typhimurium strains were pulsotype STYMXB.

Phenotypic and genetic traits of Salmonella enterica subsp. serovar Typhimurium strains causing salmonellosis foci in rabbit farms from Southern Italy in 1999-2003.

In this study, we characterised the Salmonella Typhimurium strains responsible for four outbreaks which occurred in distinct rabbit farms (Southern Italy) from 1999 to 2003. Strains were typed by Pulsed Field Gel Electrophoresis (PFGE) and the genetic basis of antimicrobial resistance was established. A major group of clonally related isolates, pulsotype STYMXB.

Validation of a seminested PCR approach for rapid detection of Salmonella enterica subsp. enterica serovar Gallinarum.

Salmonella enterica subsp. enterica serovar Gallinarum (S. Gallinarum) is the causative agent of fowl typhoid, one of the major causes of mortality and morbidity on poultry farms.