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Definition of Ixodes ricinus
1. Noun. Parasitic on sheep and cattle as well as humans; can transmit looping ill in sheep (acute viral disease of the nervous system); a vector for Lyme disease spirochete.
Exact synonyms: Sheep Tick, Sheep-tick
Generic synonyms: Hard Tick, Ixodid
Group relationships: Genus Ixodes, Ixodes
Generic synonyms: Hard Tick, Ixodid
Group relationships: Genus Ixodes, Ixodes
Medical Definition of Ixodes ricinus
1. The castor bean tick, a Euroasian species that infests cattle, sheep, and wild animals, and transmits the virus of louping ill, the piroplasm Babesia divergens, the central European tick-borne encephalitis virus, and the Lyme disease bacterium. (05 Mar 2000)