Trends of acute-phase dengue at a tertiary care hospital, Tirupati, Andhra Pradesh India

Background: The present study was designed to know the trends of acute phase dengue in the Rayalaseema region of Andhra Pradesh state. Methods: This was a retrospective study conducted at Sri Venkateswara Institute of Medical Sciences, a tertiary care teaching hospital in Tirupati, Andhra Pradesh. Samples received for dengue NS1 testing from January 2011 to December 2015 were analysed. Results: During the study period, 6182 serum samples were received from cases clinically suspected to have dengue fever. Of these 690 (11.2%) tested positive. Positivity was significantly higher among females compare to males (12.1% vs 10.4%; P = 0.037). Children (19.2%) were more affected than adults (12.2%) and elderly (3.6%) (P < 0.001). Conclusion: Acute dengue infections were high in children compared to other age-groups with preponderance during post-monsoon and monsoon periods.