Paragonimiasis in pigs

1. The pathogen paragonimiasis is caused by the parasitism of paragonimiasis in the lungs of pigs. The trematodes are dark brown, oval, fleshy trematodes, 8-16 mm long, 4-8 mm wide and 2.5 mm thick.

The adults are parasitic in the lung tissue of pigs. after the eggs are produced, they cough up with sputum, swallow in the mouth and excreted out of the body with feces. Under appropriate conditions, cercariae escape from the egg and enter the first intermediate host (freshwater snail), in which they develop into cercariae, which leave the snail body and enter the second intermediate host (oysters, etc.) to form metacercaria. The final host (pig, etc.) swallowed the larvae with metacercaria and became infected with the disease.

two。 The main clinical manifestations of the symptoms are cough.

3. The main symptom of this worm is the formation of cysts in the lungs. Cyst diameter is about 0.6 cm, is a layer of connective tissue hyperplasia of the cyst wall, about 0.1 cm thick, more solid. Slightly protruding from the surface of the lungs, bluish gray or brownish black. There were a pair of worms in most of the cysts, and only one worm or three worms were less. The capsule contains brownish-black pulpy thick liquid. Liver lesions caused by larval migration, such as punctate bleeding, etc. There are also larvae parasitic in the liver causing hard nodules and cirrhosis.

4. The diagnosis of clinical symptoms combined with fecal egg examination can be diagnosed.

5. Prevention mainly does not allow pigs to eat raw fish and other secondary intermediate hosts.

6. Treatment can be tried thiobichlorophenol, 50 mg per kg body weight 1 day, divided into 3 oral, every other day, 20 days as a course of treatment (actual 10 days).