Abstract
Background & Objectives: Pandemic H1N1 spread 74 countries and prompted World Health Organization to raise alarm label it as phase 6. The present study was conducted on throat and nasal swab samples received and tested at IPM Hyderabad, India during 2009-2011 to collect information on positive cases. Materials and Methods: Throat and nasopharyngeal swabs from influenza A H1N1 patients who were clinically diagnosed during august 2009-September 2011 along with their clinico-epidemiological details were collected from identified hospitals from Andhra Pradesh and other neighbouring States. Samples were tested by Real time reverse transcriptase PCR. Results: A total of 6805 samples, both throat and nasal swab samples from each patient were tested for H1N1 influenza virus, of which, 1329 (19.5%) were positive for pandemic influenza A H1N1, comprising 41.1% males and 44.13% females. 11.52% were below 5yrs age. Interpretation & Conclusions: The study showed a peak of cases of pandemic influenza A H1N1 in august 2009 and indicated predominance of H1N1 positive cases (19.5%) in clinically suspected group. So prompt steps should be taken in case of pandemics to contain the spread of disease and lower the load of mortality and morbidity due to pandemics.
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