Prevalence and risk factors of Blastocystis infections among primary school students in Jiangjin District, Chongqing City
10.16250/j.32.1374.2020189
- VernacularTitle:重庆市江津区小学生芽囊原虫感染情况及其危险因素
- Author:
Chao-Qun NING
1
;
Ji-Ming KANG
2
;
Yi-Ting LI
1
;
Hui-Hui CHEN
1
;
Yan-Hong CHU
1
;
Ying-Fang YU
1
;
Xiu-Ping WU
1
;
Lin AI
1
;
Jia-Xu CHEN
1
;
Li-Guang TIAN
1
;
Qi-Dong LIAO
2
Author Information
1. National Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Disease Research, WHO Collaborating Center for Tropical Diseases, 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
2. Jiangjin District Center for Disease Control and Prevention, Chongqing City, China
- Publication Type:Journal Article
- Keywords:
Blastocystis sp.;
Subtype;
Risk factor;
Primary school student;
Jiangjin District
- From:
Chinese Journal of Schistosomiasis Control
2020;32(5):489-497
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the prevalence and risk factors of Blastocystis infections among primary school students in Jiangjin District, Chongqing City. Methods A cross-sectional questionnaire survey was conducted among students sampled from a primary school in Jiangjin District, Chongqing City on April, 2018, and their stool samples were collected for microscopic examinations, in vitro culture and PCR assays to analyze the prevalence of Blastocystis infections and subtype of the parasite. In addition, the risk factors of Blastocystis infections among primary school students were identified using univariate analysis and multivariate logistic regression analysis. Results A total of 466 primary students were surveyed, and the subjects had a mean age of (9.81±1.66) years and included 236 males (50.64%) and 230 females (49.36%). The prevalence of Blastocystis infections was 15.24% (71/466) among the study students, and there was no significance difference in the prevalence between male and fe- male students (16.52% vs. 13.91%; χ2 = 0.616, P = 0.433). In addition, there was a significant difference in the prevalence of Blastocystis infections among grade 1 (6.35%, 4/63), grade 2 (5.17%, 3/58), grade 3 (21.74%, 15/69), grade 4 (25.30%, 21/83), grade 5 (10.19%, 11/108) and grade 6 students (20.00%, 17/85) (χ2 = 15.410, P = 0.009). There were four Blastocystis subtypes characterized (ST1, ST3, ST6 and ST7), in which ST6 was the most common subtype (45.07%, 32/71), followed by ST3 (25.35%, 18/71). Multivariate logistic regression analysis revealed that minority ethnicity [odds ratio (OR) = 4.259, 95% confidential inter- val (CI) : (1.161, 15.621)] and low maternal education level (primary school and below) [OR = 9.038, 95% CI: (1.125, 72.642)] were identified as risk factors of Blastocystis infection among primary school students in Jiangjin District, Chongqing City. Conclusions There is a high prevalence of Blastocystis infections detected among primary school students in Jiangjin District, Chongqing City, and ST6 and ST3 are predominant subtypes. Minority ethnicity and low maternal education level (primary school and below) are risk factors for Blastocystis infections in primary school students.
