Epidemiological characteristics of visceral leishmaniasis in Gansu Province from 2017 to 2023
Objective To analyze the epidemiological characteristics of visceral leishmaniasis in Gansu Province from 2017 to 2023,so as to provide insights into formulation of the visceral leishmaniasis control strategy in the province.Methods All ep-idemiological features of confirmed and clinically diagnosed cases of visceral leishmaniasis reported in Gansu Province from Jan-uary 1,2017 to December 31,2023 were retrieved from the Chinese Disease Prevention and Control Information System,and the epidemiological characteristics of visceral leishmaniasis cases were analyzed descriptively.Results A total of 280 visceral leishmaniasis cases were reported in 39 counties(cities and districts)of Gansu Province from 2017 to 2023,including 258 local cases reported in 21 endemic counties(districts)and 22 imported cases reported in 18 non-endemic areas.Of the 280 cases,there were 262 cases with mountain type zoonotic visceral leishmaniasis(MT-ZVL),12 cases with desert-type zoonotic visceral leishmaniasis(DT-ZVL),and 6 cases with unknown type.Re-emerging MT-ZVL occurred in Maiji District,Qinzhou District,Lixi-an County,Kangxian County,Zhenyuan County,Qin'an County and Yongjing County,and re-emerging DT-ZVL occurred in Dun-huang City,while emerging DT-ZVL occurred in Yumen City.The five counties(districts)reporting the highest number of viscer-al leishmaniasis cases included Wudu District,Wenxian County,Tanchang County,Zhouqu County and Diebu County,and a to-tal of 220 cases were reported in these five counties,accounting for 78.57%of all visceral leishmaniasis cases in the province.Visceral leishmaniasis cases were reported each month throughout the year,with the peak in July.All reported visceral leishmani-asis cases had ages of 6 months to 81 years,including 50.71%(142/280)under 15 years of age,49.29%(138/280)at ages of 15 years and older,and of all cases under 15 years of age,children at ages of 0 to 3 years were the most commonly affected(27.14%,76/280).Among 280 visceral leishmaniasis cases,there were 173 males and 107 females with a male to female ratio of 1.62∶1,and farmer was the most common occupation(40.36%),followed by diaspora children(37.86%).Conclusions The prevalence of visceral leishmaniasis appeared an overall tendency towards a decline in Gansu Province from 2017 to 2023;however,there are still multiple challenges for visceral leishmaniasis control in the province.Reinforced dog monitoring and management,inten-sified human health education and improved capability building among professionals are recommended to manage the rebounding and spread of visceral leishmaniasis.
Visceral leishmaniasisMountain-type zoonotic visceral leishmaniasisDesert-type zoonotic visceral leishmania-sisRe-emergenceEpidemiological characteristicGansu Province
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