Parasitic disease in sheep - hepatic schistosomiasis

Hepatic schistosomiasis is caused by liver parasites parasitizing in sheep's liver and bile ducts. Liver parenchyma and bile duct inflammation or cirrhosis, accompanied by systemic poisoning and metabolic disorders, are generally endemic. The disease is more harmful, especially for young animals, and it is more common in summer and autumn. 1. Pathogen The pathogen of this disease is Fasciola hepatica, which looks like a willow leaf. The female lays eggs in the bile ducts. The eggs flow into the intestines along the bile, and are excreted with the feces. Under appropriate living conditions, the eggs hatch into hairy pods, and the burrows enter the body of the intermediate host snails. The larvae then pass through the three stages of development of the pods, thunderbolts, and cercariae and return to the water to become bursa. When the sheep swallowed the water, they swallowed the capsule and infected the disease. 2. The condition of the disease can be expressed as acute and chronic symptoms. Acute symptoms include depression, loss of appetite or disappearance, increased body temperature, anemia, jaundice, hepatomegaly, and pale mucous membranes. Severe cases die within 3-5 days. Chronic symptoms include anemia, pale mucous membranes, edema around the eyelids and jaw, under the chest, under the abdomen, etc. The hair is rough and dry, easy to break off, dull, loss of appetite, gradual weight loss, and colitis, eventually leading to death. 3. Prevention (1) Do not grazing in wet or swampy land, and do not allow the sheep to drink stagnant water or drink water in areas where snails grow. Deworming 2 or 3 times a year. (2) Since the larval development requires an intermediate host snail, snails should be killed to prevent the larvae from developing. Each mu of land can be applied 20%, 20 kg of ammonia water, or use 1:5000 copper sulfate solution, lime, etc. to eliminate snails. (3) Carbon tetrachloride treatment. One part of carbon tetrachloride and one part of liquid paraffin were injected intramuscularly after mixing. Adult sheep was injected with 3 ml and 2 ml of young sheep. Oral administration of carbon tetrachloride capsules, 4 adult sheep (0.5 ml of carbon tetrachloride per capsule) and 2 young sheep (containing 1 ml of carbon tetrachloride). Carbon tetrachloride has a large side effect on sheep, and it is first tested with a few sheep when applied, and no major reactions are widely used. (4) Nitrochlorophenol treatment. 4 milligrams per kilogram body weight, one-time oral. (5) Sulfodidichlorophenol (Bettin) treatment. 35-75 milligrams per kilogram of body weight, dubbed suspensions orally. (6) phenylpropimidazole treatment. 15 milligrams per kilogram of body weight, once a day, for two days. (7) Chinese medicine treatment. Su Mu 15 grams, Guan Zhong 9 grams, betel nut 12 grams, water cut to the residue, plus 60 grams of liquor gavage. China Agricultural Network Editor

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