Physaloptera spp.
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11 terms
Terms | Definitions |
|---|---|
 Final Hosts | Dogs and cats |
| Intermediate hosts | beetles, cockroaches, and crickets |
| Paratenic hosts | snakes and birds |
| Identification | Adults are 5-6 cm, in stomach, large and resemble ascarids in size. Eggs are 45 um and more oval then spirocerca. |
| Life Cycle | Indirect. Thick-shelled elongate oval egg, containing a larva, is passed in the feces or vomitus and does not hatch until ingested by an intermediate host. In the intermediate host, the larva develops to the L3 and encysts. Paratenic hosts can be involved in which the L3 becomes encysted in the viscera. On ingestion of the intermediate or paratenic host by the final host L3 develops to the adult stage in the stomach. The nematodes live wit teh anterior end embedded in the mucosa. |
| PPP | 8-10 wk |
| Site of infection | stomach |
| pathogenesis and lesions | strong forceps-like teeth, which attach to the gastric mucosa leaving small ulcers |
| Clinical signs | vomition and nematodes are often viewed in the stomach with endoscopy. Catarrhal (=inflammation of a mucus membrane) gastritis and blood in feces. |
| Diagnosis | Elongate eggs thickened at either pole identified in feces or vomitus. Similar to Spirocerca but more oval in shape. |
| Treatment and prevention | There is no approved treatment, though various products are used (ivermectin, fenbendazole). control of insect intermediate hosts, though this is not considered practical. |
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