Spirocerca lupi is a species of nematode In dogs, infestation can cause osteosarcoma of the esophagus. Doramectin has been used against it. (www.wikipedia.com)
Spirocercosis is a disease occurring predominantly in Canidae, caused by the nematode Spirocerca lupi. Typical clinical signs are regurgitation, vomiting and dyspnoea. The life-cycle involves an intermediate (coprophagous beetle) and a variety of paratenic hosts. Larvae follow a specific migratory route, penetrating the gastric mucosa of the host, migrating along arteries, maturing in the thoracic aorta before eventually moving to the caudal oesophagus. Here the worm lives in nodules and passes larvated eggs which can be detected using zinc sulphate faecal flotation. (http://www.ncbi.nlm.nih.gov/pubmed/17512766)
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