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马术贫困是属属的一种病毒传染病，主要以持续性病毒感染，反复发烧和贫血为特征。 After being infected, horses show symptoms such as high fever, bleeding, and heart dysfunction. This virus is mainly transmitted through the blood and can be transmitted through the bites of blood-sucking insects such as mosquitoes.

Horses, mules and donkeys are all susceptible, among which horses are the most susceptible and there is no difference in breed, gender, or age. Sick horses and poisonous horses are the main sources of infection.传输路线主要包括受病毒污染的设备以及吸血昆虫的叮咬，例如蝇，蚊子，刺和米德犬。 In addition, the virus can also be transmitted vertically through the placenta.

This disease is mostly endemic or sporadic, especially in July to September. In the early stages of the epidemic, most cases experienced acute types of passage and had a high mortality rate. As the disease progresses, the disease gradually changes to subacute or chronic passage.