Epidemiological survey on pandemic influenza A [H1N1] virus infection in Kurdistan province, Islamic Republic of Iran, 2009

ABSTRACT

This study evaluated the epidemiology of suspected cases of pandemic influenza A [HINI] virus infection in 2009-2010 in Kurdistan province, a frontier province of the Islamic Republic of Iran. A questionnaire covering demographic characteristics, clinical presentation and outcome, and history of exposure and travel was completed by patients attending health centres and hospitals in the province. Nasal and throat swabs were analysed by RT-PCR. A total of 1059 suspected cases were assessed; HI Nl influenza A was confirmed in 157 [14.8%]. The highest proportion of confirmed cases was 30,0%, among children aged <1 year. In multivariate analysis, previous contact with symptomatic influenza patients [OR - 2.17] and hospitalization [OR = 3.88] were the only significant risk factors for confirmed HINI infection. Age, sex, residency, presenting symptoms and history of national or international travel were not significant. Influenza A [HI Nl] virus has spread in Islamic Republic of Iran; probably transmitted by travellers to Kurdistan