Demographic and Clinical Characteristics of Pandemic Influenza A (H1N1) 2009 Outbreak in Kerala, Southern India

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dc.contributor.authorDhanya, VC
dc.contributor.authorSara, PJ
dc.contributor.authorSanjai, D
dc.contributor.authorAmar, F
dc.contributor.authorDeepa, PM
dc.contributor.authorSantosh, GR
dc.contributor.authorJissa, VT
dc.contributor.authorPillai, MR
dc.date.accessioned2015-01-09T08:50:31Z
dc.date.available2015-01-09T08:50:31Z
dc.date.issued2014-04
dc.description.abstractAims: To study the clinical and epidemiological features in the affected individuals from different areas of Kerala, India. Study design: Population based cross sectional study. Place and Duration of Study: Regional Facility for Molecular Diagnostics, Rajiv Gandhi Center for Biotechnology and Directorate of Health Services, Kerala, between August 2009 and September 2010. Methodology: We conducted active surveillance for referral hospitals with specialist in-patient care in Kerala during pandemic periods. Oropharyngeal or nasopharyngeal swabs were tested for influenza viruses by Real time reverse transcriptase PCR. Results: A total of 4252 samples were tested for H1N1 influenza virus, of which, 30.17% were positive for pandemic influenza A H1N1 and 10.49% were positive for Influenza A (seasonal flu). Severe disease and mortality in the pandemic influenza A (H1N1) 2009 infection predominantly affected relatively healthy adolescents and adults between the age of 10 and 50 years. Both Males (29.28%) and Females (31.15%) were equally effected even though we observed a significant difference (P=.02). 141 cases exhibited lower respiratory tract symptoms. Pneumonia alone accounted for 28% of complicated cases. It was observed that the majority of cases (29.28%) during the first outbreak season were imported from affected overseas regions. Conclusion: In this study, prevalence of Influenza A H1N1 was high in the healthy younger population and there wasn’t any sex related susceptibility for Influenza infection. Majority of districts showed a positivity of approximately 10-30%, few with high positivity of >30%. Our findings highlight the importance of regular influenza immunization as it is significant to understand that the H1N1 (2009) virus may still circulate for many years with similar high severity.en_US
dc.identifier.citationBritish Microbiology Research Journal. 2014;4(10):1142-53en_US
dc.identifier.urihttp://dx.doi.org/10.1038/srep0596810.9734/BMRJ/2014/11316
dc.identifier.urihttps://dspace.sctimst.ac.in/handle/123456789/2299
dc.publisherBritish Microbiology Research Journalen_US
dc.subjectInfluenza A H1N1 2009; demographic; morbidity; mortality; pandemic; real-time RT-PCR.en_US
dc.titleDemographic and Clinical Characteristics of Pandemic Influenza A (H1N1) 2009 Outbreak in Kerala, Southern Indiaen_US
dc.typeArticleen_US
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