title: Treatment of a granuloma caused by Halicephalobus gingivalis in a horse.
abstract: A 12-year-old Arabian gelding with a granuloma caused by the nematode Halicephalobus gingivalis caudal and dorsal to the left orbit was examined. There was no evidence of dissemination of the nematode to the kidneys or the CNS, and the horse was treated with ivermectin (1.2 mg/kg [0.55 mg/lb] of body weight, p.o., every 2 weeks for 3 treatments). The granuloma was surgically debulked 2 days after the first dose of ivermectin. The granuloma resolved with no evidence of nematode infection after 18 months. Halicephalobus gingivalis is a ubiquitous saprophytic nematode that has been reported to infect humans and horses. The nematode may form granulomas in the integument or may disseminate to various organs with a tropism for the CNS and kidneys. Once clinical signs of CNS involvement develop, the disease is rapidly fatal.
authors.affiliation: Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Canada.
authors.forename: S G
authors.initials: SG
authors.lastname: Pearce
authors.forename: L P
authors.initials: LP
authors.lastname: Bouré
authors.forename: J A
authors.initials: JA
authors.lastname: Taylor
authors.forename: A S
authors.initials: AS
authors.lastname: Peregrine
mesh_terms: D000818:Animals; D000969:Antinematodal Agents / Q000627:therapeutic use*; D006099:Granuloma / Q000188:drug therapy / Q000469:parasitology / Q000601:surgery / Q000662:veterinary*; D006734:Horse Diseases / Q000188:drug therapy / Q000469:parasitology* / Q000601:surgery; D006736:Horses; D007559:Ivermectin / Q000627:therapeutic use*; D008297:Male; D017168:Rhabditida / Q000302:isolation & purification; D017196:Rhabditida Infections / Q000188:drug therapy / Q000601:surgery / Q000662:veterinary*
chemical_list: D000969:Antinematodal Agents; D007559:Ivermectin