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Molecular Characterization Of IS407A-fliP Genomic Region Of Burkholderia Mallei | 4733
Journal of Biotechnology & Biomaterials
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Glanders is an infectious and highly contagious disease of solipeds with high zoonotic potential, caused by Burkholderia
mallei, a Gram-negative, nonmotile, aerobic rod-shaped bacterium. Although this disease is not endemic but sporadic
outbreak of this dreaded disease has been reported from various part of India. Rapid and accurate diagnosis is crucial for
prevention and control of glanders. Present study aimed for molecular characterization of insertion sequence for developing
molecular diagnostic test for rapid detection of B.mallei in natural glanders disease outbreaks.
Present study identified and characterized 3? end of insertion sequence in genome that is unique to B.mallei organism only
and it can differentiate with other related organism. Briefly, Genomic DNA from B.mallei NCTC 3709 strain cultures was extracted
using phenol: chloroform extraction method and Extracted DNA was quantified and checked for purity with spectrophotometer.
The oligonucleotides primers were designed based on differences of flagellar P gene (fliP) from B.mallei ATCC 23344 (accession
numbers NC_006348 and NC_006349) and B. pseudomallei K96243 (accession number NC_006350 and NC_006351). PCR
reaction was optimized for amplification of IS407A-flip genomic region which produced ~396bp amplicon. PCR product was
purified and confirmed by restriction enzyme digestion with AluI enzyme. For nucleotide sequence determination, purified PCR
product (396 bp) was ligated into pGEM-T Easy vector by T/A cloning strategy and transformed into E. coli DH5α competent
cells using x-gal screening methods. Positives clones were confirmed by colony PCR and EcoRI restriction enzyme digestion
of Plasmid DNA from positive clones released ~396bp amplicon. Released product was eluted from the agarose gel and once
again checked by restriction enzyme digestion with AluI enzyme. Nucleotide sequence of positive clones were determined and
submitted in NCBI (accession no. JQ335996). Insertion sequence IS407A showed complete agreement with other B.mallei
strain while fliP gene showed variability among different B.mallei strain and other micro-organism. This study clearly underlines
importance of this insertion sequence in developing molecular diagnostic test for diagnosis of glanders. Consensus presence of
insertion sequence IS407A in all B.mallei strains without presence of even single nucleotide polymorphism offers a wide scope to
develop insertion sequence based molecular diagnostic test for detection of glanders. These diagnostic tests may helpful in precise
diagnosis in natural glanders outbreak.
Chandan Prakash has completed his graduation with chancellor gold medal in veterinary sciences (BVSc & AH) from CSA University of agriculture
and technology, Kanpur, Uttar Pradesh, and acquired post graduation in Veterinary Bacteriology from Indian Veterinary Research Institute with ICAR
Junior Research Fellowship. Presently, he is working as scientist in centre for animal disease research and diagnosis (CADRAD), IVRI, Izatnagar,
Uttar Pradesh. He has published papers in reputed journals of national and international level.
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