Externally they have ticks, fleas and lice. Their vectors are mostly hematophagic arthropods such as fleas, lice, ticks, and mosquitoes. In field environments, soldiers are susceptible to infestation of lice, ticks, and fleas. Threadworms can be transmitted by biting insects such as ticks and mosquitoes. Bunyaviridae are transmitted by hematophagous arthropods including mosquitoes, midges, flies, and ticks. They are primarily spread through arthropod vectors (mainly ticks and mosquitoes). Viruses carried by arthropods such as mosquitoes or ticks are known collectively as arboviruses. Benzyl benzoate is used as a repellent for chiggers, ticks, and mosquitoes. The virus is transmitted via vectors (ticks and mosquitoes). Catte suffered from intestinal parasites and ticks. There are thousands of species of mites and ticks from the subclass Acari. The scientific discipline devoted to the study of ticks and mites is called acarology. The jungle cat can host parasites such as "Haemaphysalis" ticks and "Heterophyes" trematode species. Lyme disease is the most common disease spread by ticks in the Northern Hemisphere. Ehrlichia is a genus of Rickettsiales bacteria that are transmitted to vertebrates by ticks.