Crenosoma vulpis
| Crenosoma vulpis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Crenosoma vulpis | ||||||||||||
| ( Dujardin , 1844) |
Crenosoma vulpis is a parasite of the lungs of dogs belonging to the group of roundworms . The main host of this lungworm is the red fox , but domestic dogs , raccoon dogs , wolves and coyotes are also attacked. The disease it causes is called crenosomosis . Female worms are 12 to 16 mm long, male 4 to 8 mm. The parasite occurs in large parts of Europe, but also in eastern Canada and Alaska .
Life cycle
The intermediate hosts of Crenosoma vulpis are snails in which the infectious third larva (L3) develops. After ingesting infected snails, the larvae burrow through the wall of the host's small intestine and reach the liver via the portal vein . They reach the heart via the hepatic vein and the caudal vena cava and from there via the pulmonary artery to the host's lungs . Larvae can be detected in the lungs as early as six hours after infection. The third moult takes place after four days and the fourth moult after another four days. The resulting pre- adults migrate from the bronchioli into the bronchial tubes (→ bronchial system ) and mature there into adults. The adults begin with the formation of first larvae with a prepatency of 19 days. These are coughed up, swallowed and, after passing through the digestive tract, are released into the outside world. First larvae are 240 to 310 µm long and have a slightly bent rear end. Adult worms can live nine months or even longer.
literature
- D. Barutzki: Nematode infections of the respiratory tract in dogs in Germany. In: Tierärztliche Praxis Kleintiere 41 (2013), pp. 326–336.
- Dominique Grandjean et al .: Parasitic Rhinitis: Crenosoma infestation . In: Practical guide to dog breeding diseases. Aniwa Publications 2001, p. 111.