Epidemiologic analysis of mycoplasma pneumonia infection in Shandong from 2011 to 2013

doi:10.3760/cma.j.issn.1673-4777.2015.09.013

Abstract：Objective To investigate the infection situation of mycoplasma pneumonia (MP) in acute respiratory infection in Shandong Province from January 2011 to December 2013.Methods The serums of 22 946 patients with acute respiratory infection in Shandong Province from January 2011 to December 2013 were collected to measure the MP IgM.The distribution characteristics of MP infection in different years and seasons,different genders and ages,were analyzed.Results Among 22 946 samples,the total positive rate of MR was 33.3％ (7 632/22 946) ; the positive rate was 32.6％ (2 385/7 306),34.2％ (2 337/6 840) and 33.1％ (2 910/ 8 800) in 2011,2012 and 2013,respectively,showing no significant difference (P ＞ 0.05).The infection rate of MR was the highest in 7-12 years patients [46.9％ (2 869/6 118)],followed by 43.2％ (326/755) in 13-20 years old and 38.8％ (2 476/6 384) in 4-6 years old; the infection rate of MR was the lowest in ＜ 1 infants,[7.8％ (140/1 795)] ; there were significant differences among patients with different ages (P ＜ 0.05).The infection rate was 36.1％ (3 248/9 000) in females,higher than that in males [31.4％ (4 384/13 946)] (P ＜ 0.05).There were epidemiological differences of infection incidence of MP among different seasons:the infection rate in winter was the highest [39.9％ (2 441/6 122)],followed by 37.8％ (2 155/5 696) in autumn and 31.5％ (1 565/4 975) in spring; the infection rate in summer was the lowest [23.9％ (1 471/6 153)]; the infection rate in winter and autumn was significantly higher than that in summer (P ＜ 0.05).Conclusion The incidence of MP infection from 2011 to 2013 is stable in Shandong province; the females,children and adolescents are susceptible; the infection rate shows seasonal differences(highest in winter and lowest in summer).