(ăk″ă-rī′nă)
[Pronunciation]

An order of arachnids that includes many ticks and mites.
Most are ectoparasites, i.e., parasites that infest the skin and skin structures; their bites or burrowing cause localized dermatitis and itching. Systemic reactions are rare. Some may be vectors of disease.

See: Ixodidae; Lyme disease; Sarcoptidae; scabies; tick