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Arch Virol. 2010 Dec;155(12):2041-6. doi: 10.1007/s00705-010-0794-x. Epub 2010 Sep 15.

Isolation of bluetongue virus serotype 1 (BTV-1) from goats and its phylogenetic relationship to other BTV-1 isolates worldwide based on full-length sequence of genome segment-2.

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Division of Virology, Indian Veterinary Research Institute, Mukteswar Campus, Nainital, 263 138, Uttarakhand, India.


Eight bluetongue viruses (BTV) were isolated in BHK-21 cell culture from blood of goats suffering from peste des petits ruminants. These viruses were identified as BTV serotype 1 (BTV-1) by RT-PCR using VP2-gene-based primers coupled with sequencing of the PCR products. All of the isolates showed similar genome migration profile in 8% polyacrylamide gel electrophoresis. The genome segment-2 (seg-2) of one isolate (MKD18/India/2008) was amplified piecemeal by overlapping PCR, and the products were sequenced to obtain full-length seg-2. Phylogenetic analysis based on the seg-2 sequence revealed that MKD18 is closely related to Australian BTV-1 isolates, with 86.3-86.8% nucleotide identity. Phylogenetic analysis based on the partial sequence of seg-2 (541 bp, nucleotides 1,304-1,844) showed that the Indian BTV-1 isolates, namely, MKD18, Avikanagar, Sirsa-3 and Chennai, are very closely related to each other, with more than 99.6% nucleotide identity. Although a high degree of similarity exists, the Indian BTV-1 isolates collected over the past 25 years should be studied to demonstrate the co-existence of different VP2 antigenic profiles.

[Indexed for MEDLINE]

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