Porcine lung nematode disease is a nematode disease caused by porcine lung nematode (A. elegans). Adults are parasitic in the bronchus. The eggs produced enter the pharynx with the secretion of the trachea, and then swallow and then digest. The road is finally discharged to the outside with the feces. The mature eggs are eaten by the cockroaches, and then the pigs are infected with these cockroaches, so the infection rate of the stocking pigs is high. Let's take a look at the clinical symptoms, pathological changes, diagnostic methods and preventive measures of porcine pulmonary nematode disease.
1, the symptoms of pig lung nematode disease
Adults of nematodes will suck blood and stimulate the bronchial mucosa, causing bronchitis and bronchial pneumonia. After infection with pigs, pigs will develop paroxysmal cough, causing symptoms such as anemia and weight loss, which can cause death in severe cases. Larvae often carry pathogens with movement, so they often develop bacterial pneumonia.
2, pathological changes
At the posterior edge of the pulmonary iliac crest, some edema areas with gray-white bulge are formed, and the bronchi of the parasitic area becomes thick and hard. After being cut, a large number of worms escape from the bronchi by hand pressing.
3, how to diagnose
The eggs can be confirmed by floating the saturated saline or sodium sulfate saturated solution. The egg of O. elegans is elliptical, grayish white, with a layer of tipped protein membrane containing larvae.
4, prevention measures
(1) The following drugs can be used for treatment: levozole, albendazole, ivermectin and the like have good effects. The dose of albendazole is 30 mg orally per kilogram of body weight.
(2) The pig house should be built in a dry and elevated place to reduce the occurrence of cockroaches.
(3) Pig farms with this disease should be dewormed in a planned manner.
(4) Pig manure should be concentrated and used after accumulation and fermentation.
Although pig lung nematode seems to be terrible, but usually farmers pay more attention to preventive measures, it can still reduce the probability of the disease.
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