1. Pathogens The pathogen of Haemonchus is Heterodera worm (Tursiaria gracilis), which parasitizes in the fourth stomach of the sheep. Its insect length is 10 mm and its female length is 25 mm. The body is small, whiskered, and the female is like a red thread and a white thread twisted together. 6,000 eggs can be laid every day, and the eggs are discharged into the grass with the feces. Under the suitable temperature (25C) and humidity conditions, larvae can be hatched after 4-5 days to cause infection. After rain, larvae are often rushed to low-lying areas by rain, so grazing in low-humidity areas, the sheep are most likely to be infected with Haemonchus. 2. Symptoms In general, the diseased sheep manifested as anemia, Weight Loss, rough hair, depression, loss of appetite. When shepherds are sick, the sheep can't afford to be out of place or lying. Alternating diarrhea and constipation. Underarm, chest, and sub-abdominal edema, body temperature is generally normal, the pulse is weak and fast, the number of breathing is increased, and finally the lying ground cannot afford to collapse and die. The necropsy shows that a large number of Haemonchus larvae are absorbed on the mucosa of the stomach wall or are free from the contents of the stomach. 3. Prevention and control (1) Grazing is not carried out in low-lying and damp places, but “dew grass†is not allowed, and stagnant water is not used. The manure in the sheep house must be accumulated and fermented to kill the eggs, and regular preventive deworming should be done. For example, the animals are repelled twice a year before the spring grazing grass, late autumn or early winter. (2) benzimidazole treatment, a dose of 15 mg per kilogram body weight, one-time oral administration. (3) Insecticide net (thiazole, tetraimidazole) treatment, 20 mg per kilogram of body weight, plus water filling service. (4) Levamisole treatment, 12 mg per kilogram of body weight, dubbed an aqueous solution, once fed. China Agricultural Network Editor
Anti Wrinkle Botulinum Toxin,Anti Wrinkle Toxin,Ele Botulinum Toxin
Pharmaceutical Products for Human Co., Ltd. , http://www.beautyinjectable.com