ABSTRACT
Analysis of the VP1 gene sequence of the foot and mouth disease virus (FMDV) is critical to understanding viral evolution and disease epidemiology. A standard set of primers have been used for the detection and sequence analysis of the VP1 gene of FMDV directly from suspected clinical samples with limited success. The study validated VP1-specific degenerate primer-based reverse transcription polymerase chain reaction (RT-PCR) for the qualitative detection and sequencing of serotype O FMDV lineages circulating in India. The novel degenerate primer-based RT-PCR amplifying the VP1 gene can circumvent the genetic heterogeneity observed in viruses after cell culture adaptation and facilitate precise viral gene sequence analysis from clinical samples.
ABSTRACT
Foot-and-mouth disease (FMD) is an acute highly contagious viral disease of cloven-hoofed animals which has been discovered more than 100 years ago. The causative organism is a RNA virus belongs to the Aphthovirus genus, Picornaviridae family. The disease is endemic in India and every year the economic loss due to direct and indirect cause is more than USD 4 billion annually. The Andaman & Nicobar Islands also suffered due to the outbreak of FMD in the year 2005 which was due to serotype O. However, in the present study the reemergence of FMD virus almost after a gap of 13 years has been reported from the South Andaman district of the A & N Islands. The outbreak was confirmed as serotype O and is mainly affected more than 800 cattle, goat and buffalo population. The reemergence of the FMD virus in the islands has posed a serious concern to the livestock of this island which is now being considered as almost free from many of the dreaded disease. Based on the epidemiological investigation it could be concluded that the virus might have entered through the transport of straws which is being used as packing materials for vegetable and fruits from mainland