Potential risk of colonization of Bulinus globosus in the mainland of China under climate change

Infectious Diseases of Poverty

Mingzhen He¹  Robert Bergquist²  Jian He³  Wei Li³  Jianfeng Zhang³  Xinyao Wang³  Kun Yang³  Dacheng Xu⁴  Mtumweni Ali Muhsin⁵  Mchanga Suleman⁵  Saleh Juma⁵ 

[1] Changzhou Center for Disease Control and Prevention;Ingerod;Jiangsu Institute of Parasitic Diseases;Jintan Center for Disease Control and Prevention;Ministry of Health of Zanzibar;

关键词: Bulinus globosus;    Colonization;    Potential distribution;    Geographic information systems;    Climate change;    Schistosoma haematobium;   

DOI  :  10.1186/s40249-022-00980-2

来源: DOAJ

【 摘 要 】

Abstract Background Bulinus globosus, the main intermediate snail host of Schistosoma haematobium. The increased contacts between Africa and China could even lead to large-scale dissemination of B. globosus in China. Temperature is the key factor affecting fresh-water snail transmission. This study predicted potential risk of colonization of B. globosus in the mainland of China under climate change. Methods We investigated minimum and maximum temperatures for B. globosus eggs, juveniles and adult snails kept under laboratory conditions to find the most suitable range by pinpointing the median effective temperatures (ET50). We also assessed the influence of temperature on spawning and estimated the accumulated temperature (AT). The average air temperatures between 1955 and 2019 in January and July, the coldest and hottest months in China, respectively, were collected from national meteorological monitoring stations and investigated in a geographic information system (GIS) using empirical Bayesian Kriging to evaluate the theoretical possibility for distribution of B. globosus in southern China based on temperature. Results The effective minimum temperature (ET50min) for eggs, juveniles, adult snails and spawning were 8.5, 7.0, 7.0, 14.9 °C, respectively, with the corresponding maximum values (ET50max) of 36.6, 40.5, 40.2 and 38.1 °C. The AT was calculated at 712.1 ± 64.9 °C·d. In 1955, the potential B. globosus distribution would have had a northern boundary stretching from the coastal areas of Guangdong Province and Guangxi Autonomous Region to southern Yunnan Province. Since then, this line has gradually moved northward. Conclusions Annual regeneration of B. globosus can be supported by the current climate conditions in the mainland of China, and a gradual expansion trend from south to north is shown in the study from 2015 to 2019. Thus, there is a potential risk of colonization of B. globosus in the mainland of China under climate change. Graphical Abstract

【 授权许可】

Unknown