Abstract:

Objective By analyzing the hospital's medical records of influenza A (H1N1) patients in the Linxia Hui Autonomous Prefecture, to explore the epidemical characteristics of the disease and to provide evidences for the local prevention. Methods By cluster sampling, in-patients with influenza A (H1N1) diagnosed by laboratory experiment in the Linxia Hui Autonomous Prefecture between September 2009 and March 2010 were collected. Through unified questionnaire, 147 eligible patients were analyzed of epidemiology and clinical features. Results The high-risk group of the disease was mainly students aged 14-24 years, and to fall ill mainly from October to December in all over the Prefecture. The main clinical features were cough (98.64%), hypodynamia (88.44%), sore throat (80.95%), throat congest (76.87%), headache (76.19%), and body aches (53.06%). The incidences of sore throat and headache were significantly different between males and females (89.32% vs 61.36% and 89.32% vs 45.45%, P＜0.01). The diseases was companied with ardent fever. The incidence of fever was significantly different between males and females (70.06% vs 29.94%, P＜0.05). In additions, there was a obviously falling of the peripheral blood lymphocyte in the laboratory examination, and there were significantly higher rates of abnormal percentages of white blood cells, lymphocytes, and neutrophilic granulocytes in males (P＜0.05). The patients' conditions were improved after active treatment. Conclusion There were significant differences of distribution of peripheral blood cells between male and female influenza A (H1N1) patients. The incidence of fever was higher in males. It is necessary to strength the education of influenza A (H1N1) about the relative epidemic knowledge and to move forward  the inoculation period and to expand the inocuation range for the students, in order to prevent prevailing of the disease.

Key words: influenza A (H1N1), case study, region health strategies