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Medical Definition of Laelaps echidninus
1. The spiny rat mite, a common worldwide ectoparasite of the wild Norway rat and occasionally found on the house mouse, cotton rat, and other rodents; it is the natural vector of Hepatozoon muris and can transmit the agent of tularaemia experimentally. Junin virus has been isolated from this species in South America. (05 Mar 2000)