doi: 10.14202/vetworld.2017.814-817
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Article history: Received: 07-02-2017, Accepted: 13-06-2017, Published online: 23-07-2017
Corresponding author: Samir Dey
E-mail: samirddy@yahoo.co.in
Citation: Pal S, Dey S, Batabyal K, Banerjee A, Joardar SN, Samanta I, Isore DP (2017) Characterization of Salmonella Gallinarum isolates from backyard poultry by polymerase chain reaction detection of invasion (invA) and Salmonella plasmid virulence (spvC) genes, Veterinary World, 10(7): 814-817.Aim: The aim was to characterize Salmonella enterica serovar Gallinarum isolated from backyard poultry by polymerase chain reaction (PCR) detection of virulence genes invasion (invA) and Salmonella plasmid virulence C (spvC).
Materials and Methods: Two strains of Salmonella serovar Gallinarum isolates used in this study were obtained from an outbreak of fowl typhoid in backyard Vanaraja fowl. PCR technique was used for detection of invA and spvC genes using standard methodology. The invA PCR product from one representative isolate was sequenced and compared with other related Salmonella serovars in GenBank data.
Results: Salmonella Gallinarum produced expected amplicons of invA and spvC gene products. Nucleotide sequence of 285 bp invA gene was deposited in GenBank with accession no. KX788214. Sequence analysis of invA gene was found conserved in Salmonella serovars and demonstrated 100% homology with closely related serovars of Salmonella.
Conclusion: Invasion gene (invA) was found to be highly conserved in Salmonella Gallinarum and highly similar with closely related serovars. The isolates also contained plasmid-mediated spvC gene indicating possession of virulence plasmid.
Keywords: invA, polymerase chain reaction, Salmonella Gallinarum, Salmonella plasmid virulence C, virulence genes.
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