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Chikungunya virus outbreak in Kerala, India, 2007: a seroprevalence study
Kumar, Narendran Pradeep; Suresh, Abidha; Vanamail, Perumal; Sabesan, Shanmugavelu; Krishnamoorthy, Kalianna Gounder; Mathew, Jacob; Jose, Varakilparambil Thomas; Jambulingam, Purushothaman.
  • Kumar, Narendran Pradeep; Vector Control Research Centre Field Station. Kerala. IN
  • Suresh, Abidha; Vector Control Research Centre Field Station. Kerala. IN
  • Vanamail, Perumal; Vector Control Research Centre. Indian Council of Medical Research. Puducherry. IN
  • Sabesan, Shanmugavelu; Vector Control Research Centre. Indian Council of Medical Research. Puducherry. IN
  • Krishnamoorthy, Kalianna Gounder; Vector Control Research Centre. Indian Council of Medical Research. Puducherry. IN
  • Mathew, Jacob; Rubber Research Institute of India. Kerala. IN
  • Jose, Varakilparambil Thomas; Rubber Research Institute of India. Kerala. IN
  • Jambulingam, Purushothaman; Vector Control Research Centre Field Station. Kerala. IN
Mem. Inst. Oswaldo Cruz ; 106(8): 912-916, Dec. 2011. graf, tab
Article in English | LILACS | ID: lil-610963
ABSTRACT
India was affected by a major outbreak of chikungunya fever caused by Chikungunya virus (CHIKV) during 2006-2007. Kerala was the worst affected state during 2007 with a contribution of 55.8 percent suspected cases in the country. However, except for clinically reported case records, no systematic information is available on infection status of CHIKV in the region. Hence, we carried out a post-epidemic survey to estimate seroprevalence status [immunoglobulin G (IgG)] in the community using commercially available indirect immunofluorescence test. This methodology had been reported to be highly specific and sensitive for CHIKV infection. The study area selected was the worst affected mid-highlands region of Kerala which harbour vast area of rubber plantations. The study evidenced 68 percent of the population to be seropositive for CHIKV IgG. Males were found more affected than females (χ2 = 9.86; p = 0.002). Among males, prevalence was significantly higher in the age classes 21-30 (χ2 = 5.46; p = 0.019) and 31-40 (χ2 = 5.84; p = 0.016) years. This may be due to high occupational risk of the male population engaged in plantation activities exposed to infective bites of Aedes albopictus. The current study provides an insight into the magnitude of CHIKV outbreak in Kerala.
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Full text: Available Index: LILACS (Americas) Main subject: Immunoglobulin G / Chikungunya virus / Disease Outbreaks / Alphavirus Infections / Antibodies, Viral Type of study: Diagnostic study / Observational study / Prevalence study / Risk factors Limits: Adult / Female / Humans / Male Country/Region as subject: Asia Language: English Journal: Mem. Inst. Oswaldo Cruz Journal subject: Tropical Medicine / Parasitology Year: 2011 Type: Article Affiliation country: India Institution/Affiliation country: Rubber Research Institute of India/IN / Vector Control Research Centre Field Station/IN / Vector Control Research Centre/IN

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Full text: Available Index: LILACS (Americas) Main subject: Immunoglobulin G / Chikungunya virus / Disease Outbreaks / Alphavirus Infections / Antibodies, Viral Type of study: Diagnostic study / Observational study / Prevalence study / Risk factors Limits: Adult / Female / Humans / Male Country/Region as subject: Asia Language: English Journal: Mem. Inst. Oswaldo Cruz Journal subject: Tropical Medicine / Parasitology Year: 2011 Type: Article Affiliation country: India Institution/Affiliation country: Rubber Research Institute of India/IN / Vector Control Research Centre Field Station/IN / Vector Control Research Centre/IN