Outbreak of chikungunya fever, Dakshina Kannada District, South India, 2008

The outbreak of chikungunya fever that surfaced in India during late 2005 has affected more than 1.56 million people, spread to more than 17 states/union territories, and is still ongoing. Many of these areas are dengue- and leptospirosis-endemic settings. We carried out a cross-sectional survey in...

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Published in:The American journal of tropical medicine and hygiene 2010-10, Vol.83 (4), p.751-754
Main Authors: Manimunda, Sathya P, Sugunan, Attayur P, Rai, Subhodh K, Vijayachari, Paluru, Shriram, Ananganallur N, Sharma, Sameer, Muruganandam, Nagarajan, Chaitanya, Itta K, Guruprasad, Dev R, Sudeep, Anakkathil B
Format: Article
Language:English
Subjects:
Adolescent
Adult
Alphavirus Infections - epidemiology
Antibodies, Viral - blood
Chikungunya virus - immunology
Child
Cross-Sectional Studies
Disease Outbreaks
Humans
Immunoglobulin M - blood
India - epidemiology
Middle Aged
Seasons
Seroepidemiologic Studies
Short Report
Time Factors
Young Adult
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Summary:The outbreak of chikungunya fever that surfaced in India during late 2005 has affected more than 1.56 million people, spread to more than 17 states/union territories, and is still ongoing. Many of these areas are dengue- and leptospirosis-endemic settings. We carried out a cross-sectional survey in one such chikungunya-affected location in Dakshina Kannada District of Karnataka State to estimate the magnitude of the epidemic and the proportion of chikungunya virus (CHIKV) infections that remained clinically inapparent. The seropositivity for CHIKV infection was 62.2%, and the attack rate of confirmed CHIK fever was 58.3%. The proportion of inapparent CHIKV infection was 6.3%. The increasing trend in the seropositivity and attack rate of CHIKV infection with age group was statistically significant. The present study is an indicator of the magnitude of the ongoing outbreak of CHIKV infection in India that started during 2005-2006.
ISSN:0002-9637
1476-1645
DOI:10.4269/ajtmh.2010.09-0433