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Medical Term:


Pronunciation: ōr-ni-thon′i-sŭs

Definition: A genus of bird and rodent mites; species include Ornithonyssus bacoti, the tropical rat mite, a possible vector of murine typhus and a cause of human dermatitis; Ornithonyssus bursa, the tropical fowl mite; and Ornithonyssus sylviarum, the northern fowl mite.

[G. ornis (ornith-), bird, + nyssus, to prick]