CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES >
Prevalence of visceral leishmaniasis in China in 2019
Received date: 2020-02-22
Online published: 2020-11-12
Supported by
National Critical Project for Science and Technology on Infectious Diseases(2017ZX10303404)
Objective To understand the epidemic situation of visceral leishmaniasis in China in 2019. Methods Data of visceral leishmaniasis in 2019 were collected from the web-based National Diseases Reporting Information System operated by the Chinese Center for Disease Control and Prevention. After excluding suspected cases, duplicates and cutaneous leishmaniasis cases, a database was established. Descriptive epidemic statistics of visceral leishmaniasis was performed using a Microsoft Excel 2016. Results A total of 166 cases of visceral leishmaniasis were reported in 72 counties of 15 provinces (autonomous regions and municipalities) in 2019, including 163 cases of mountainous zoonotic type, 3 cases of desert zoonotic type and no anthroponotic type. The cases mainly distributed in Shanxi (52 cases), Gansu (43 cases) and Shaanxi Provinces (34 cases), accounting for 77.7% (129/166) of the total reported. A total of 124 local transmitted cases were reported from 31 endemic counties, and 42 imported cases reported 41 non-endemic counties. Zhouqu County of Gansu Province, Hancheng City of Shaanxi Province, Yangquan City suburb and Pingding County of Shanxi Province were the major endemic areas, with 16, 16, 13 and 10 cases reported respectively, accounting for 33.1% (55/166) of the total cases. Zhenyuan County in Gansu Province, Hejin City in Shanxi Province, Long’an District in Henan Province, and Xingtai County in Hebei Province were reemerging endemic counties of visceral leishmaniasis, reporting 6 indigenous cases. The occurrence of visceral leishmaniasis peaked in April, with a male-to-female ratio of 1 ∶ 0.5. Farmers as well as preschoolers are the high-risk populations for visceral leishmaniasis, accounting for 47.6% (79/166) and 27.1% (45/166) of the total cases, respectively. The visceral leishmaniasis cases were mainly distributed in the group aged ≥15 years. However, the age distribution varied significantly due to different types of visceral leishmaniasis, with the desert-type zoonotic cases mainly distributed in age group of 0-2 years of preschoolers and the mountain-type zoonotic cases mainly in farmers aged of ≥15 years. Conclusion Visceral leishmaniasis has a low prevalence in China, whereas the endemic area shows a trend of spreading, thus, it is imperative to strengthen the surveillance for visceral leishmaniasis.
Key words： Visceral leishmaniasis; Epidemic status; Distribution; China
Zheng-bin ZHOU , Yuan-yuan LI , Yi ZHANG , Shi-zhu LI . Prevalence of visceral leishmaniasis in China in 2019[J]. CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES, 2020 , 38(5) : 602 -606 . DOI: 10.12140/j.issn.1000-7423.2020.05.012
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