Prevalence of soil - borne nematode infections among residents living in urban/town areas of China in 2015
10.16250/j.32.1374.2020202
- VernacularTitle:2015 年我国城镇居民土源性线虫感染调查
- Author:
Hui-Hui ZHU
1
;
Chang-Hai ZHOU
1
;
Ting-Jun ZHU
1
;
Ji-Lei HUANG
1
;
Men-Bao QIAN
1
;
Ying-Dan CHEN
1
;
Shi-Zhu LI
1
;
Xiao-Nong ZHOU
1
Author Information
1. National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; WHO Collaborating Center for Tropical Diseases; Chinese Center for Tropical Diseases Research; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasites and Vector Biology, National Health Commission, Shanghai 200025, China
- Publication Type:Journal Article
- Keywords:
Soil-borne nematodiasis;
Urban and town areas;
Hookworm;
Ascaris lumbricoides;
Trichuris trichiura;
China
- From:
Chinese Journal of Schistosomiasis Control
2020;32(5):476-482
- CountryChina
- Language:Chinese
-
Abstract:
Objective To understand the prevalence of soil-borne nematode infections among residents living in urban/town areas of China, so as to provide insights into the control and elimination of soil-borne nematodiasis. Methods A total of 5 epidemic areas were classified in China according to the prevalence of human Clonorchis sinensis infections captured from the 2014–2015 national survey on major human parasitic diseases in China, and the total sample size was estimated according to the binomial distribution and Poisson’s distribution. Then, the total sample size was allocated proportionally to each province (autonomous region, municipality) of China based on the percentage of residents living in urban and town areas, and the number of survey sites in each province (autonomous region, municipality) was proportionally assigned according to the percentages of residents living in urban and town areas. Then, stratified sampling was performed at county, township and community levels according to the number of sampling sites in each province (autonomous region, municipality), and the survey site (community) was defined as the smallest sampling unit. All permanent residents in the survey sites were selected as the study subjects, and their stool samples were collected for identification and counting of parasite egg using a Kato-Katz technique. The prevalence and intensity of each parasite species were calculated. Results From 2014 to 2015, among the 133 231 residents detected in 31 provinces (autonomous regions, municipalities) of China, the overall prevalence of soil-borne nematode infections was 1.23% (1 636/133 231), and the prevalence rates of hookworm, Ascaris lumbricoides and Trichuris trichiura infections were 0.77% (1 032/133 231), 0.32% (426/133 231) and 0.17% (224/133 231), respectively. The highest prevalence of soil-borne nematode infections was seen in Jiangxi (4.03%, 82/2 034) and Chongqing (4.03%, 524/13 012), followed by in Hainan (3.47%, 72/2 075). The prevalence of soilborne nematode infections was 1.07% (662/62 139) in men and 1.37% (974/71 092) in women, and the greatest prevalence was found in residents at ages of 65 to 70 years (2.56%, 219/8 569). With regard to occupations and education levels, herdsmen (2.47%, 2/81) and illiterate residents (3.33%, 226/6 795) were found to have the highest prevalence of soil-borne nematode infections, respectively. In addition, mild infections were predominantly identified in hookworm-, A. lumbricoides- and T. trichiura-infected individuals (all > 90%). Conclusions The overall prevalence of soil-borne nematodiasis remains low in urban and town areas of China; however, human infections are widespread. According to the epidemiological features, health education combined with deworming are recommended to reduce the prevalence of soil-borne nematode infections among residents living in urban and town areas of China.
