Macracanthorhynchus ingens infection in a dog.
A 4-month-old sexually intact female Siberian Husky was examined because of diarrhea and 4 flesh-colored annulated helminths that were recovered from the dog's feces. Infection with Macracanthorhynchus ingens was diagnosed on the basis of morphologic features of the adult parasites and ova. Spindle-shaped eggs (mean length, 91 microm; mean width; 54 microm) were obtained from the body cavity of a gravid female specimen. The dog was treated empirically with epsiprantel (5.5 mg/kg [2.5 mg/lb] of body weight) and ivermectin (250 to 500 microg/kg [114 to 227 microg/lb]), and the diarrhea resolved. Infection with this parasite has been reported in raccoons from the same geographic area. Macracanthorhynchus ingens is typically a parasite of raccoons, wolves, badgers, foxes, skunks, mink, and moles; transmission from wildlife to dogs may occur via ingestion of infected intermediate hosts (millipedes).
Pearce
J R
JR
Stage Road Animal Hospital, Memphis, TN 38128, USA.
Hendrix
C M
CM
Allison
N
N
Butler
J M
JM
D000049:Acanthocephala / Q000302:isolation & purification*; D000818:Animals; D004283:Dog Diseases / Q000175:diagnosis / Q000469:parasitology* / Q000635:transmission; D004285:Dogs; D005243:Feces / Q000469:parasitology; D005260:Female; D006374:Helminthiasis, Animal / Q000175:diagnosis* / Q000469:parasitology / Q000635:transmission