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Epidemiologic analysis of MP infection in children from 2006 to 2010.

??Abstract??Objective To summarize the epidemiology of Mycoplasma pneumoniae??MP?? infection in children with acute respiratory tract infection??ARI????and to explore the changes of the epidemiological characteristics in the recent five years. Methods MP was detected using microparticle agglutination method in 183??841 children with ARI. We analyse distribution characteristics of MP by age?? season and gender. Results Among the 183??841 samples??the positive rate was 30.8%. There was significant difference in the infection rate between boys and girls??P??0.01????girls ??35.5%??higher than boys ??27.4%??. MP infection rate from 2006 to 2010 was 22.4%??16.8%??25.8%??29.9% and 39.2%??respectively. In 0-to-3-year-old-group??the positive rate for MP was 19.8%??while in 3-to-6-year-old-group and above 6-year-old-group?? 38.3% and 48.1% were positive?? respectively??Which showed a significant difference in the infection rate between the 3 groups. There were epidemiological differences in infection incidences by MP in different seasons??spring 26.9% ??summer 31.7%?? autumn 33.5% and winter 31.2%??. The MP infection incidences showed seasonal differences??P??0.01??. Conclusion The incidence of MP infection in the recent 5 years increased year by year??with 2010 as the highest. MP infection can occur through the whole year?? especially in autumn. School age children are still the vulnerable infected group with high incidence in girls than boys.