Local epidemiology of Dengue is defined by the genetic diversity of the circulating Dengue virus (DENV) strains. This important information is not available for the virus strains from most parts of the Indian
subcontinent. The present study focused on the genetic diversity of the serotype 3 DENV strains (DENV-3) from India. A total of 22 DENV-3 strains identified by reverse-transcription PCR analysis of serum samples from 709 patients were studied. These samples were collected over a period of 4 years (2008–2011) from dengue fever suspected patients from Kerala, a dengue endemic state in South India.

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