A large tick that infests many mammals, including humans, and frequently transmits diseases.
- Ixodes ricinus, family Ixodidae.
- But researchers are increasingly convinced that Ixodes ricunus, or the common sheep tick, could be the cause of some of the world's most mystifying diseases.
- There is little doubt that a decade of gradual decline has continued, caused by a combination of disease, from sheep ticks and a gut parasite, warmer winters and wetter springs.
- Since the early 1980s The Game Conservancy Trust has been studying the impact of sheep ticks and the disease louping ill on red grouse in Scotland.
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