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Ticks (order Ixodida) are parasitic arachnids that are part of the mite superorder Parasitiformes. Adult ticks are approximately 3 to 5 mm in length depending on age, sex, species, and "fullness". Ticks are external parasites, living by feeding on the blood of mammals, birds, and sometimes reptiles and amphibians.
Ticks are invertebrate animals in the phylum Arthropoda, and are related to spiders. Ticks are in the subclass Acari, which consists of many orders of mites and one tick order, the Ixodida. Some mites are parasitic, but all ticks are parasitic feeders.
Feb 27, 2024 · Tick, any of about 825 species of invertebrates in the order Parasitiformes (subclass Acari). Ticks are important parasites of large wild and domestic animals and are also significant as carriers of serious diseases. Almost all are categorized as either hard ticks or soft ticks.
- The Editors of Encyclopaedia Britannica
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.
- D. variabilis
- Dermacentor
One species, Ixodes uriae, has an odd, disjunctive distribution (they are found in the arctic region and Antarctica) and feeds on sea birds. Ticks can be nidicolous (live in the nests and burrows of their hosts) or free in the environment.
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Oct 21, 2021 · Ehrlichiosis. Lyme disease. Rocky Mountain spotted fever. Information on ticks and tickborne disease. Provided by the U.S. Centers for Disease Control and Prevention.
Aug 1, 2023 · Tickipedia – The Resource Site on Ticks and Tickborne diseases. Knowledge is Power. Here at Tickipedia, we are dedicated to providing the most accurate and up-to-date information on ticks and tick-borne diseases.