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tick
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tick

Any of the arachnid family Ixodoidae, order Acarina, of large bloodsucking mites. They have flat bodies protected by horny shields. Many carry and transmit diseases to mammals (including humans) and birds.

Life cycle

During part of their existence they parasitize animals and birds, for which they have developed a rostrum or beak composed of two barbed harpoons above and a dart below. Their eggs are laid on rough herbage and hatch into white six-legged larvae, which climb up the legs of passing animals and in some species complete their life history on the animal's skin, but in others return to the grass for a period, dropping from the host when engorged with blood.

Ticks cause irritation and anaemia, and can also transmit typhus, Lyme disease, rickettsia, and relapsing fever.



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During the early years of the program, almost all of the ticks submitted were American dog ticks (Dermacentor variabilis).
Possible strategies such as the collection of ticks, specifically the American dog tick, Dermacentor variabilis (a known vector for tularemia), from animals upon entry into urban animal shelters and mapping of areas where the animals were found need to be considered if resources are limited.
Health officials had presumed that the fever spreads exclusively through American dog ticks and Rocky Mountain wood ticks--species that typically feed on wild rodents and other small mammals, including dogs.
 
 
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