Epidemiology of scrub typhus and influencing factors in Yunnan province, 2006-2013.
10.3760/cma.j.issn.0254-6450.2018.01.011
- Author:
Y SUN
1
;
C SHI
2
;
X L LI
3
;
L Q FANG
4
;
W C CAO
4
Author Information
1. Center of Disease Control and Prevention of Jinan Military Region, Chinese People's Liberation Army, Jinan 250014, China.
2. Shandong Management University, Jinan 250357, China.
3. Center for Disease Control and Prevention of Aerospace System, Beijing 100101, China.
4. State Key Laboratory of Pathogen and Bio-security, Institute of Microbiology and Epidemiology, Academy of Military Medical Science, Beijing 100071, China.
- Publication Type:Journal Article
- Keywords:
Risk factors;
Scrub typhus;
Spatiotemporal distribution
- MeSH:
Child;
China/epidemiology*;
Environment;
Epidemics;
Farmers;
Female;
Humans;
Incidence;
Male;
Models, Statistical;
Orientia tsutsugamushi;
Risk Factors;
Scrub Typhus/transmission*;
Temperature
- From:
Chinese Journal of Epidemiology
2018;39(1):54-57
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To understand the epidemiological characteristics of scrub typhus and influencing factors in Yunnan province, and provide further information for the prevention and control of scrub typhus. Methods: Based on the incidence data of scrub typhus reported in Yunnan from 2006 to 2013, the epidemiological characteristics of scrub typhus were analyzed and related environmental factors were identified with panel negative binomial regression model. Results: A total of 8 980 scrub typhus cases were reported during 2006-2013 in Yunnan. The average annual incidence was 2.46/100 000, with an uptrend observed. Natural focus expansion was found, affecting 71.3% of the counties in 2013. The epidemic mainly occurred in summer and autumn with the incidence peak during July-October. The annual incidence was higher in females than in males. More cases occurred in children and farmers, the proportions of cases in farmers and pre-school aged children showed an obvious increase. Panel negative binomial regression model indicated that the transmission risk of scrub typhus was positive associated with monthly temperature and monthly relative humidity. Furthermore, an "U" pattern between the risk and the increased coverage of cropland and grassland as well as an "inverted-U" pattern between the risk and increased coverage of shrub were observed. Conclusion: It is necessary to strengthen the scrub typhus surveillance in warm and moist areas as well as the areas with high coverage of cropland and grassland in Yunnan, and the health education in children and farmers who are at high risk.
