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What are the prevention and treatment methods for clonorchiasis in pigs?

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1. Pathogen: caused by Clonorchis sinensis parasitizing the bile ducts of the liver. Besides pigs, dogs, cats and humans can also be infected. Clonorchis sinensis is a relatively small and transparent fluke, 10-20 cm long and 2-5 mm wide, shaped like a willow leaf. The eggs are passed with the feces, are swallowed in water by the first intermediate host, freshwater snails, and develop inside the snail, emerging as cercariae. The cercariae enter the body of the second intermediate host, freshwater fish, and form metacercariae, and the final host (pigs, etc.) becomes infected by eating undercooked fish containing metacercariae. In the pig's small intestine, the metacercarial wall membrane is digested

1. Pathogen: caused by Clonorchis sinensis parasitizing the bile ducts of the liver. Besides pigs, dogs, cats and humans can also be infected. Clonorchis sinensis is a relatively small and transparent fluke, 10-20 cm long and 2-5 mm wide, shaped like a willow leaf.

The eggs are passed with the feces, are swallowed in water by the first intermediate host, freshwater snails, and develop inside the snail, emerging as cercariae. The cercariae enter the body of the second intermediate host, freshwater fish, and form metacercariae, and the final host (pigs, etc.) becomes infected by eating undercooked fish containing metacercariae. In the pig's small intestine, the metacercarial wall membrane is digested, and the larvae migrate into the bile ducts and develop into adults.

2. Symptoms: with a light infection there are no symptoms at all; with a heavy infection there is reduced appetite, emaciation, diarrhea, edema, ascites and mild jaundice.

3. Necropsy: inflammation of the bile ducts, proliferation of connective tissue in the duct wall, and when there are many flukes they can block the bile ducts, cirrhosis of the liver, and sometimes necrotic foci are seen.

4. Diagnosis: a definitive diagnosis can be made based on the clinical symptoms together with the finding of eggs in the feces.

5. Prevention: ferment the feces for treatment, and do not feed pigs raw fish.

6. Treatment

① Hexachlorophene may be tried, 20 mg per kg of body weight, once a day, for 2-3 consecutive days.

② Piperazine propionate: 0.05-0.06 g per kg of body weight, mixed into the feed and given, once a day, with 5 days as one course of treatment, with good results.

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