PMID- 21423887 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20110714 LR - 20240504 IS - 0973-2063 (Electronic) IS - 0973-2063 (Linking) VI - 5 IP - 10 DP - 2011 Feb 15 TI - Phylogenetic analysis of H1N1 sequences from pandemic infections during 2009 in India. PG - 416-21 AB - Since April 2009, a serious pandemic infection has been rapidly spread across the world. These infections are caused due to the novel swine origin influenza A (H1N1) virus and hence these are commonly called as "Swine Flu". This new virus is the reassortment of avian, human and swine influenza viruses and thus it has a unique genome composition. There are 16 different types of hemagglutinin (HA) and 9 different types of neuraminidase (NA) that can be genetically and antigenetically differentiated. The first influenza A virus isolated from pigs was of the H1N1 subtype and these viruses have been reported to cause infection in pigs in many countries. The outbreak of this virus has been transmitted from pigs to humans. This new reassorted (exchange of genes) virus which is the cause of 2009 pandemic infections has the ability to spread from human to human. This spread of infection should be brought to an end. In this study, a phylogenetic analysis of the nucleotide sequences of the RNA segments of human H1N1 viruses was carried using MEGA version 4.0 to demonstrate the route map of infection to India. Phylogenetic analysis of the sequences from India, published in Influenza Virus Resource (a database that integrates information gathered from the Influenza Genome Sequencing Project of the National Institute of Allergy and Infectious diseases (NIAID) and the genbank of the (NCBI)) was retrieved and used for the analysis. The results showed that the various segments of the Indian isolates clustered well with the sequences from American, Asian and European countries and thus indicating the transmission of viruses from these places to India. FAU - Flavia, Guntupally Balaswamy Arti AU - Flavia GB AD - Division of Medical Microbiology, Department of Microbiology, School of Life Sciences, Bharathidasan University, Tiruchirappalli - 620 024, Tamilnadu, India. FAU - Natarajaseenivasan, Kalimuthusamy AU - Natarajaseenivasan K LA - eng PT - Journal Article DEP - 20110215 PL - Singapore TA - Bioinformation JT - Bioinformation JID - 101258255 PMC - PMC3055158 OTO - NOTNLM OT - H1N1 virus OT - India OT - Phylogenetic analysis OT - Swine Flu EDAT- 2011/03/23 06:00 MHDA- 2011/03/23 06:01 PMCR- 2011/01/01 CRDT- 2011/03/23 06:00 PHST- 2010/07/26 00:00 [received] PHST- 2010/08/26 00:00 [accepted] PHST- 2011/03/23 06:00 [entrez] PHST- 2011/03/23 06:00 [pubmed] PHST- 2011/03/23 06:01 [medline] PHST- 2011/01/01 00:00 [pmc-release] AID - 009400052011 [pii] AID - 10.6026/97320630005416 [doi] PST - epublish SO - Bioinformation. 2011 Feb 15;5(10):416-21. doi: 10.6026/97320630005416.