In the HA gene phylogenetic tree, the Indian isolates of 2008-09 clustered alongside with Bangladesh isolates. Inside of this cluster the 2007 isolates of Bangladesh shared closer identification with the 2007 isolates of Kuwait and Saudi Arabia. This could be indicative that the Kuwait and Saudi Arabia viruses are the possible ancestral supply of the viruses in Bangladesh. Notably, from the timeline it is very clear that, the outbreaks described in Bangladesh coincide with individuals of Saudi Arabia, which have been preceded by the Kuwait outbreaks. Regardless of whether migratory birds or trade between these international locations would be the possible cause of these outbreaks is nevertheless to be comprehended. With the 1st wave of the outbreak in January 2008 in India, practically the complete of southern WB was afflicted (Figure one). In the course of Marchay 2008 (2nd wave of the outbreak), the infection distribute to the northern districts of WB, viz Darjeeling and Jalpaiguri, and also to a major component of Tripura together with repeated outbreaks in number of of the previously influenced districts of southern WB. In the 3rd wave of the outbreak (November 2008ay 2009), the motion of the an infection was in direction of the northeast with many districts of Assam and the northern areas of WB becoming afflicted. Bayesian analysis of the phylogenetic LCB14-0602 relationships among the 2008-09 Indian isolates and 2007-09 Bangladesh isolates (Figure three) indicated that the cluster of Indian and Bangladesh isolates could be even more divided into three main Peficitinib subgroups. Curiously, in every single subgroup, the Indian isolates shaped separate clusters much more or considerably less independent of the Bangladesh isolates of 2007-09. All but the South Dinajpur isolate of the early stage I outbreak (January 2008) clustered collectively in the initial subgroup, while only the South Dinajpur (Ck/India/WB-NIV529/08) and the late 2008 isolate of Malda (Ck/India/WB-NIV16915/08) clustered into the next subgroup together with other 2007-08 isolates of Bangladesh. Dependent on the observations it appears that there have been several resources of the virus into the region throughout the early section I outbreaks in India. The viruses of Tripura (late period I outbreaks) and Assam (section II) shared relatedness with one more isolate of Bangladesh (Ck/Bangladesh/BL411/08) and so also the 2009 isolates of India ended up located to be associated with other Bangladesh isolates, implying possibly other sources of the virus into these states or in-situ evolution and spread within the place. Nevertheless, the transmission of viruses between the two nations around the world in either path cannot be denied. Altogether, it seems that the area including Bangladesh and the East and Northeast components of India have grow to be endemic to the H5N1 virus. The total genome sequencing of the 4 isolates picked from the distinct clusters reviewed over, represent diverse time details of infection and independent outbreak incidents.