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Crenosoma vulpis Homepage     
Common name: Fox lungworm Kingdom: Animalia Phylum: Nemathelminthes Class: Nematoda Order: Strongylida Family: Crenosomatidae Genus: Crenosoma Species: vulpis
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Adult Parasite:The adult worm measures less than 16 mm long. The cuticle of the anterior end of the this worm is thrown into crenated folds as seen in this photomicrograph of a portion of the worm recovered by a tracheal wash.
Hosts:
Life Cycle:The first stage-larva penetrates the intermediate host (a snail or slug). The larva molts twice and by 17 days post-infection becomes a third stage-larva. The third stage-larva remains in the snail's tissues until the snail is eaten by a definitive host. The third stage-larva makes its way to the lungs and develops to the adult stage in the bronchi and bronchioles. The female worm lays live first stage-larvae, which are carried up the trachea, are swallowed and pass out with the feces. The prepatent period is about 19 days.
Site in host where adult parasite is found:
Diagnostic Stage:
Photomicrographs of L1 from tracheal wash
Common Diagnostic Test
Clinical Signs:
Treatment:Ivermectin, Fenbendazole for 7 to 10 days, Febantel for 7 to 10 days
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© University of Pennsylvania 2004 Comments or Questions please contact: Dr. Nolan at:
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