Bianba Z M
National Health Commission Key Laboratory of Hydatid Disease Control and Research; Institute of Parasitic Diseases, Tibet Autonomous Region Center for Disease Control and Prevention, Lhasa 850001, China.
Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi. 2020 Jun 29;32(5):502-505. doi: 10.16250/j.32.1374.2020095.
To investigate the current prevalence of human intestinal protozoal infections in Tibet Autonomous Region, so as to provide the scientific basis for the development of the future control strategy.
The study sites were sampled using a stratified cluster random sampling method in different ecological zones and different geographical locations of Tibet Autonomous Region in 2015. Fecal samples were collected from the permanent residents at ages of 3 years and older for the detection of intestinal protozoa cysts and trophozoites. The region-, gender-, age-, occupation- and education level-specific prevalence of human intestinal protozoal infections was estimated and compared.
A total of 70 study sites were sampled from 23 counties (districts) in 3 ecological zones of Tibet Autonomous Region in 2015. Among 17 939 subjects surveyed, there were 1 117 residents infected with intestinal protozoa, with a prevalence of 6.23%. There were 9 species of intestinal protozoa identified, and (3.59%), (0.74%) and (0.72%) were found to have a high in- fection rate. The prevalence of human intestinal protozoal infections was 7.20%, 6.39% and 4.48% in the southern, eastern and northern Tibetan ecological zones, respectively. Among the 23 counties (districts), the highest human prevalence was seen in Baingoin (13.56%) and Amdo counties (12.77%), and there were significant differences in the prevalence of human intestinal pro- tozoal infections among the three ecological zones (2 = 33.909, < 0.01) and 23 counties (districts) (2 = 580.511, < 0.01). There was no gender-specific prevalence of human intestinal protozoal infections (men, 6.08%; women, 6.35%; 2 = 0.542, > 0.05); however, there was age-specific human prevalence (2 = 44.377, < 0.01), and a higher prevalence was seen in residents at ages of 60－69 years (8.51%) and 50－59 years (7.67%). In addition, there were occupation- ( = 37.568, < 0.01) and education level-specific prevalence rates of human intestinal protozoal infections (2 = 14.659, < 0.01), and a higher prevalence was seen in farmers (7.17%) and herdsmen (5.28%), and in residents with a primary school education (6.62% and illiterate resi- dents (6.33%).
The prevalence of human intestinal protozoal infections remains high in Tibet Autonomous Region. The health education pertaining to intestinal parasitic disease control requires to be intensified among farmers and herds- men in rural areas.
调查西藏自治区人体肠道原虫感染的现状，为制定未来防控策略提供科学依据。
2015年采用分层整群随机抽样方法，在西藏自治区不同生态区和不同地理位置进行抽样。收集3岁及以上常住人口的粪便样本，检测肠道原虫包囊和滋养体。估计并比较不同地区、性别、年龄、职业和文化程度人群的人体肠道原虫感染率。
2015年从西藏自治区3个生态区的23个县（区）共抽取70个研究点。在17939名受调查对象中，有1117名居民感染肠道原虫，感染率为6.23%。共鉴定出9种肠道原虫，其中 （3.59%）、 （0.74%）和 （0.72%）感染率较高。西藏南部、东部和北部生态区的人体肠道原虫感染率分别为7.20%、6.39%和4.48%。在23个县（区）中，班戈县（13.56%）和安多县（12.77%）的人体感染率最高，三个生态区（χ² = 33.909，P < 0.01）和23个县（区）（χ² = 580.511，P < 0.01）的人体肠道原虫感染率存在显著差异。人体肠道原虫感染率无性别差异（男性为6.08%，女性为6.35%；χ² = 0.542，P > 0.05）；但存在年龄差异（χ² = 44.377，P < 0.01），60 - 69岁（8.51%）和50 - 59岁（7.67%）的居民感染率较高。此外，人体肠道原虫感染率还存在职业差异（F = 37.568，P < 0.01）和文化程度差异（χ² = 14.659，P < 0.01），农民（7.17%）和牧民（5.28%）以及小学文化程度居民（6.62%）和文盲居民（6.33%）的感染率较高。
西藏自治区人体肠道原虫感染率仍然较高。农村地区的农民和牧民需要加强肠道寄生虫病防治的健康教育。
