An investigation report on influenza outbreak in schools about ECHO33 virus
LI Xian-ping1, ZHAN Dai-hong1, LIU Li-li1, TAN Xiao-juan2, HUNAG Wei3, LIU Fan-bing1, TANG Sheng-hui4, LIU Fu-qiang3
1 Shimen county center for disease control and prevention,Shimen,415300,Hunan; 2 China center for disease control and prevention; 3 Hunan Provincial center for disease control and prevention; 4 Xing Pu township health hospital Shimenn County, Hunan province
Abstract：ObjectiveTo investigate the epidemiologic features and etiology on an influenza-like outbreak of students in Shimenn County,Hunan province. MethodsThe field epidemiological survey was used to analyze the cases and suspicious transmitting media of the outbreak. 12 collection of nasopharyngeal swab from patients were performed on for enterovirus nucleic acid detection and virus isolation. VP1 sequence was used for determination of alignment and on identification the type of isolation human enterovirus. ResultsThe outbreak lasted 20 days from May 29th to June 18th in 2013. A total of 108 cases were diagnosed,and the attack rate was 11.26%. The peak was between June 6th and June 9th with 92 new cases diagnosed. The first case appeared at a middle school. The cases in middle school accounting for 69.44%, with the gender ratio 1.12:1. The attack rate of students in high grades (12- or over 14 years old) was a bit lower than that of students in lower grades (≤5,6-,8-,10-years old), and result was statistically significant(P<0.05). Incubation period was 3.5 days. The main symptoms were fever (76.85%), sore throat and tonsil enlargement (54.63%), headache (42.59%). Most of cases were benign;12 nasopharyngeal swabs were performed on etiologic testing, 10 samples were positive of human enterovirus, and they were confirmed echovirus type 33 infection by isolation human enterovirus. ConclusionThe influenza-like outbreak of students in Shimen county was caused by ECHO33 infection. We should strengthen pathogen monitoring and prevention and control outbreak of influenza-like cases in the schools.
李先平,占代红 ,刘丽莉 ,檀晓娟 ,黄威,刘凡兵,唐生辉,刘富强. 一起埃可病毒33型肠道病毒引起学校流感样疫情暴发调查[J]. 实用预防医学, 2016, 23(3): 317-320.
LI Xian-ping, ZHAN Dai-hong, LIU Li-li, TAN Xiao-juan, HUNAG Wei, LIU Fan-bing, TANG Sheng-hui, LIU Fu-qiang. An investigation report on influenza outbreak in schools about ECHO33 virus. , 2016, 23(3): 317-320.
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2016, Vol. 23 
