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 BRIEF COMMUNICATION
Year : 2015  |  Volume : 33  |  Issue : 1  |  Page : 143-146

Emergence of influenza A (H1N1) PDM09 in the remote Islands of India - A molecular approach


1 Regional Medical Research Centre (ICMR), Port Blair, Andaman & Nicobar Islands-744101, India
2 Regional Medical Research Centre (ICMR), Port Blair, Andaman & Nicobar Islands-744101; Regional Medical Research Centre (ICMR), Nehru Nagar, Belgaum-590010, India
3 Regional Medical Research Centre (ICMR), Port Blair, Andaman & Nicobar Islands-744101; KLE Dr. Prabhakar Kore Basic Science Research Centre, KLE University, Belgaum-590010, India

Correspondence Address:
P Vijayachari
Regional Medical Research Centre (ICMR), Port Blair, Andaman & Nicobar Islands-744101
India
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Source of Support: The study was supported by the intramural funds from the Indian Council of Medical Research (Department of Health Research, Ministry of Health and Family Welfare, Government of India), Conflict of Interest: None


DOI: 10.4103/0255-0857.148417

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Background: A disease outbreak of A (H1N1) PDM09 was reported in Andaman and Nicobar islands in 2009 with an attack rate of 33.5% among settler population and 26.3% among the aboriginal Nicobarese tribe. During the ongoing outbreak of A (H1N1) PDM09 disease in different parts of the world, a subject working in Dubai city of Saudi Arabia, came to Port Blair, following which the pandemic triggered for the first time in these Islands. Materials and Methods: During the period August 2009 to January 2011, 30 confirmed cases of Influenza A (H1N1) PDM09 virus infection was detected. To understand the genetic relationship, the NA gene sequences of the viruses were phylogenetically analysed together along with the virus sequence isolated from other parts of the world. Result: Formation of multiple clusters were observed, with the sequences of Andaman Islands, mainland India, Mexico, Saudi Arabia and few other counties clustering together. The sequence analysis data revealed that there was no specific mutation conferring resistance to oseltamivir among the Andaman A (H1N1) PDM09 virus isolates. The result of phylogenetic analysis have also revealed that the A (H1N1) PDM09 virus might have spread in these remote Islands of India via the subject from Saudi Arabia/Dubai. Conclusion: A (H1N1) PDM09 Influenza outbreak have highlighted the need to strengthen the region-specific pandemic preparedness plans and surveillance strategies.






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