clinical presentation and final outcome in definite cases of influenza a (h1n1) in kashan, iran

background: influenza a (h1n1) imposed a considerable burden on our health community. this study was conducted to evaluate the clinical and paraclinical pattern of the disease in influenza a (h1n1) patients in kashan. materials and methods: this descriptive study was carried out on 87 definite cases of pandemic influenza a (h1n1) diagnosed from july to january 2009 in kashan. the clinical and paraclinical information were collected and analyzed by spss-13. results: the majority of patients were in age group 16-25 years and 50.6% of patients were male. the most common clinical symptoms were fever (92%), cough (78.2%) and dyspnea (54%). the most important paraclinical findings were: leokocytosis (41.3%) increased esr (46.6%), positive crp (48.7%). the mortality was seen in 8 patients (9.2%). conclusion: regarding to majority of death has occurred in patients with underlying disease, annual prophylaxis by influenza vaccine and early treatment to prevent of morbidity and mortality is recommended.