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Companion Animal Practice
Disease risks for the travelling pet: Ehrlichiosis
  1. Kate Murphy

    Kate Murphy graduated from Bristol in 1996. She is currently a clinical fellow in small animal emergency medicine and intensive care at Bristol. She holds the RCVS diploma in small animal medicine and the diploma of the European College of Veterinary Internal Medicine.

  2. Susan Shaw

    Susan Shaw graduated from the University of Sydney, Australia, in 1974. She is currently senior lecturer in the department of clinical veterinary science at Bristol and is director of the university's Acarus Unit which investigates arthropod-borne diseases in companion animals.


EHRLICHIOSIS is a bacterial infection caused by a group of haemotropic intracellular bacteria. These organisms are transmitted by ticks and primarily cause disease in dogs and, occasionally, cats. Serious and sometimes fatal disease can occur in susceptible animals; in those with partial immunity, disease may remain subclinical unless they are immunocompromised. This article reviews the epidemiology, pathogenesis, diagnosis and management of ehrlichial disease in dogs and cats.

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