Diagnosis and treatment of preparagonimiasis in chickens

Paragonimiasis is a common paragonimiasis in chickens. The incidence of adult hens is high, which is one of the main reasons affecting egg production and abnormal eggs.

The pathogen is paragonimus, also known as tubal fluke. The insect body is flat like a small leaf, brownish red, about 3-9 mm long and 1-5 mm wide, and has two suckers on its head. Adults are parasitic in the reproductive organs of hens, mainly in the supraluminal bursa of the fallopian tube and cloaca. The eggs are excreted from the feces and fall into the water, and hatch and develop into larvae-cercariae; after leaving the snails, the cercariae swim in the water and are eaten by dragonfly larvae and continue to develop in them. Chickens get sick after eating dragonfly or dragonfly larvae. In the chicken body, trematode larvae travel down the intestinal tube to the cloaca, into the superior sac or fallopian tube, where they continue to develop into adults.

At the beginning of the disease, the parasitic site is inflamed. The cloaca of the hen often exudes leucorrhea; then, because the worm destroys the mucous membrane and glandular tissue of the fallopian tube, the hen's normal function of laying eggs is impaired, and abnormal eggs such as yolk eggs and soft shell eggs are often produced. When the diseased chicken is poisoned by trematotoxin, the whole body symptoms are obvious, do not eat, lose weight, do not want to move, abdominal feathers fall off, cloaca prolapse, hyperemia turn red. During the autopsy, inflammation of the fallopian tube and cloaca can be seen, and broken eggshells and proteins are often seen.

Diagnosis of frequent leucorrhea hens, reduced egg production, and abnormal eggs, can be suspected to be the disease. The diagnosis can be made if the eggs are found in the stool examination. Combined with autopsy, if the worm is found, the diagnosis is more accurate.

Carbon tetrachloride was used to disinfect the disease at the beginning of the treatment, with a dosage of 1.5 ml per chicken. Feed the chicken before injection to enlarge the crop so that it is easy to inject and the effect is better. Each adult chicken can also take orally hexachloroethane (0.2-0.5 g), which can be made into a water suspension and fed in the concentrate, once a day for three consecutive days. 5% trichlorfon aqueous solution can also be used to smear the cloaca and the inside of the fallopian tube, and good results can also be obtained.

Prevent the concentrated composting of feces to prevent the eggs from entering the water so as to cut off their life cycle.