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Dermacentor variabilis, also known as the American dog tick or wood tick, is a species of tick that is known to carry bacteria responsible for several diseases in humans, including Rocky Mountain spotted fever and tularemia (Francisella tularensis). It is one of the best-known hard ticks. Diseases are spread when it sucks blood from the host.
The disease is caused by Rickettsia rickettsii, a type of bacterium that is primarily spread to humans by American dog ticks, Rocky Mountain wood ticks, and brown dog ticks. [4] Rarely the disease is spread by blood transfusions. [4] Diagnosis in the early stages is difficult. [5]
Tick-borne diseases, which afflict humans and other animals, are caused by infectious agents transmitted by tick bites. [1] They are caused by infection with a variety of pathogens , including rickettsia and other types of bacteria , viruses , and protozoa . [ 2 ]
The Western blacklegged tick, which can also spread Lyme disease but primarily lives on the West Coast. The lone star tick can transmit Heartland virus and Southern tick-associated rash illness.
Tick paralysis is believed to be due to toxins found in the tick's saliva that enter the bloodstream while the tick is feeding. The two ticks most commonly associated with North American tick paralysis are the Rocky Mountain wood tick (Dermacentor andersoni) and the American dog tick (Dermacentor variabilis); however, 43 tick species have been implicated in human disease around the world. [1]
tick bite (primarily by Ixodes ricinus) First human case reported in 1934. Lyme disease: Borrelia burgdorferi: deer, wolves, dogs, birds, rodents, rabbits, hares, reptiles tick bite Lymphocytic choriomeningitis: Lymphocytic choriomeningitis virus: rodents exposure to urine, feces, or saliva Marburg viral haemorrhagic fever: Marburg virus
The tick-borne encephalitis virus is known to infect a range of hosts including ruminants, birds, rodents, carnivores, horses, and humans. The disease can also be spread from animals to humans, with ruminants and dogs providing the principal source of infection for humans. [4]
If the tick was carrying certain tick-borne illnesses, a tick bite may lead to distinctive rashes that appear in the weeks following the bite. This happens in some cases of Lyme disease or Rocky ...