Virulence genotyping of Salmonella spp. with multiplex PCR

Avian Diseases
Jerod A SkybergLisa K Nolan

Abstract

The purpose of this study was to develop a multiplex polymerase chain reaction (PCR) protocol useful in the virulence genotyping of Salmonella spp. with the idea that genotyping could augment current Salmonella characterization and typing methods. Seventeen genes associated with Salmonella invasion, fimbrial production, toxin production, iron transport, and intramacrophage survival were targeted by three PCR reactions. Most of these genes are required for full Salmonella virulence in a murine model, and many are also located on Salmonella pathogenicity islands (PAIs) and are associated with type III secretion systems (TTSSs). Once the success of procedures that used positive and negative control strains was verified, the genotypes of 78 Salmonella isolates incriminated in avian salmonellosis (primarily from sick, commercially reared chickens and turkeys) and 80 Salmonella isolates from apparently healthy chickens or turkeys were compared. Eleven of the 17 genes tested (invA, orgA, prgH, tolC, spaN [invJ], sipB, sitC, pagC, msgA, spiA, and iroN) were found in all of the isolates. Another (sopB) was present in all isolates from sick birds and all but one isolate from healthy birds. The remaining five genes (lpfC, cdtB, sifA, pefA...Continue Reading

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Jan 16, 2014·Indian Journal of Microbiology·Omar Ismail Elemfareji, Kwai Lin Thong
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Datasets Mentioned

BETA
AL627271
AB040415
NC007208
CP000026

Methods Mentioned

BETA
PCR
electrophoresis

Software Mentioned

BLAST
Lasergene

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