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Iftikar Hussain, Md.
- Multiplex-PCR Assay for Detection of some Major Virulence Genes of Salmonella enterica Serovars from Diverse Sources
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Authors
Mridusmita Choudhury
1,
Probodh Borah
1,
Hridip Kumar Sarma
2,
Luit Moni Barkalita
3,
Naba Kumar Deka
1,
Isfaqul Hussain
4,
Md. Iftikar Hussain
1
Affiliations
1 State Biotechnology Hub, Assam, College of Veterinary Science, Guwahati 781 022, IN
2 Department of Biotechnology, Gauhati University, Guwahati 781 014, IN
3 Department of Animal Biotechnology, College of Veterinary Science, Khanapara 781 022, IN
4 Department of Microbiology, College of Veterinary Science, Khanapara 781 022, IN
1 State Biotechnology Hub, Assam, College of Veterinary Science, Guwahati 781 022, IN
2 Department of Biotechnology, Gauhati University, Guwahati 781 014, IN
3 Department of Animal Biotechnology, College of Veterinary Science, Khanapara 781 022, IN
4 Department of Microbiology, College of Veterinary Science, Khanapara 781 022, IN
Source
Current Science, Vol 111, No 7 (2016), Pagination: 1252-1258Abstract
The virulence of Salmonella depends on virulence factors encoded by specific genes. The present study describes the development of a simple and rapid multiplex PCR (m-PCR) assay for simultaneous detection of seven major virulence genes of Salmonella (invA, invH, stn, sopB, sopE, sefC and pefA). Presence of these genes was studied using 17 standard cultures and 76 field isolates from different sources. Seventeen non-Salmonella strains were also tested for specificity of the optimized PCR. A spiked control experiment was done to detect the sensitivity of m-PCR assay. The primer pairs were found to be specific for Salmonella only. The assay detected 250 pg of purified chromosomal DNA, or 12 cfu of Salmonella in crude lysates. All the field isolates and standard strains of Salmonella were found to carry invA, invH, stn and sopB genes, while variability was observed with respect to sopE, sef C and pefA genes. Thus this multiplex PCR assay provides a simple and rapid method for detection of major virulence factors in important clinical serovars of Salmonella.Keywords
Multiplex PCR, Salmonella, Spiking, Virulence Genes.Full Text
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