FIRST REPORT OF THE ACANTHOCEPHALAN MACRACANTHORHYNCHUS INGENS FROM THE DOMESTIC DOG CANIS FAMILIARIS IN KANSAS

摘要

On 21 August 1993 a single adult specimen of the acanthocephalan Macracanthorhynchus ingens (Oligacanthorhychidae) was collected in Manhattan, Kansas. The 10 cm long female specimen was defecated by a two year old Portuguese water dog which weighed 20 kg and was boarded at a residence located in a wooded hillside area of the city. The specimen of M. ingens was stained in acid carmine, preserved in glycerol, and partially dissected to expose the proboscis for diagnostic purposes. It was distended with ovarian balls at various stages of development. The size and stage of maturity of the specimen is indicative of normal development in the host's intestine. The specimen is deposited with the United States National Museum (USNM 84482). A follow up fecal examination of the canine host, which receives 136 μg/month ivermectin orally for heartworm prevention, produced only Giardia sp. cysts.