An outbreak of Chikungunya fever in Yunnan province near the China-Myanmar border in 2019
10.3760/cma.j.cn112866-20200609-00185
- VernacularTitle:2019年云南中缅边境基孔肯雅热暴发疫情的流行病学特征
- Author:
Xiaoxiong YIN
1
;
Yonghua LIU
;
Hailin ZHANG
;
Ping LI
;
Zhaolan YANG
;
Siyu CHEN
;
Zhaosheng GUO
Author Information
1. 瑞丽市疾病预防控制中心传染病防制科 678600
- Keywords:
Chikungunya fever;
Epidemiological characteristics;
Outbreak
- From:
Chinese Journal of Experimental and Clinical Virology
2020;34(6):600-604
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To understand the epidemiological characteristics of an outbreak of Chikungunya fever (CHIK) in Ruili city at Sino-Myanmar border area in Yunnan province, China, 2019.Methods:The data of CHIK cases in Ruili city were collected. Serum samples were collected from acute phase of the patients for the detection of the viral nucleic acid with real-time reverse transcription PCR assay.Results:A total of 121 CHIK cases (laboratory-confirmed cases) were reported in Ruili city in 2019, in which 98 were indigenous cases (80.99%) including 2 pregnant women and 3 neonatal cases (twin boys and 1 girl) were observed with vertical mother-to-child transmission), and 23 were imported cases (19.01%) from Myanmar. CHIK mainly occurred in Urban area (Mengmao town) and port area (Jiegao development zone) of Ruili city. The epidemic of CHIK lasted from September to November. The epidemic peak was in October (74.38%). The majority of patients were aged from 20—59 years (77.69%), in addition to 3 cases of mother-to-child transmission, the youngest was 3 months and the oldest 72 year-old. The male to female ratio was 1∶1.28 (53∶68). Occupational distribution of CHIK cases was mainly for the commercial service personnel (33.06%), home workers and unemployed persons (21.49%) and retiree (11.57%).Conclusions:During the outbreak of CHIK in Ruili in 2019, both indigenous and imported cases were detected. The imported CHIK cases from Myanmar were the main sources for local transmission of CHIK in Ruili city. This is the first time that a local epidemic of CHIK has occurred in Yunnan Province. It is necessary to strengthen control of the cross-border spread of CHIK in this area.
