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Monday 5 June 2006

Definition: Tick is the common name for the small arachnids that, along with mites, constitute the order Acarina.


- https://twitter.com/azdermpath/status/706149476608532481

Ticks are ectoparasites (external parasites), living by hematophagy on the blood of mammals, birds, and occasionally reptiles and amphibians.

Ticks are important vectors of a number of animal and human diseases, as Lyme disease.

Tick-borne diseases

Ticks are second only to mosquitoes as vectors of human disease.

- hard ticks

  • relapsing fever
  • Lyme disease
  • Rickettsioses (Rickettsiosis)
  • Rocky Mountain spotted fever
  • tularemia
  • equine encephalitis
  • Colorado tick fever
  • ehrlichiosis

Generally, tick-borne diseases correspond to a specific tick-host combination, and are limited in their geographical extent. For example, nearly 90% of all Lyme disease cases have been reported in the Northeastern part of the US,[2] only specific deer ticks carry that disease.[3] According to the Rhode Island Department of Health, roughly 70% of people who develop Lyme disease in that part of North America catch it from ticks in their own yard.

See also

- tick-bite


  • Tick
  • Tick