Neurological symptoms caused by disturbance of calcium and phosphorus metabolism in chickens
Strictly speaking, the neurological symptom disease caused by calcium and phosphorus metabolism disorder should be expressed as osteomalacia, which is characterized by deformed keel, powerless expansion of ribs, brittle and easily broken legs, weak breathing and difficulty in walking, no sense of grip, and is common in chicks. It is also easy to occur in all kinds of caged chickens. In addition to the incoordination of the proportion of calcium and phosphorus, the deficiency of vitamin An and D3 is also one of the reasons for the disturbance of calcium and phosphorus metabolism. The most common pathological changes in pathological examination were hyperplasia of rib vertebrae and severe deformities at the junction of ribs and cartilage. Supplementation of vitamins and calcium carbonate to the diet can quickly change this symptom.
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Luxi cattle
(1) Origin and distribution: Luxi cattle is one of the four major breeds of Central Plains yellow cattle in China. Mainly produced in Heze in the southwest of Shandong Province. The two areas of Jining, namely, the Yellow River in the north, the old route of the Yellow River in the south and the triangle on both sides of the canal in the east. Among them, the central producing areas are Echeng, Necheng, Heze, Juye, Liangshan and Jiaxiang, Jinxiang, Jining and other counties in Heze area. It is distributed in the south of Liaocheng area and the southwest of Tai'an area, but the quality is slightly poor. At present, there are about 400000 Luxi cattle in the producing area.
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Cross-infection and safe injection in pigs
(1) sterilization of inoculation equipment. Inoculation equipment syringes, needles, etc. must be sterilized in strict accordance with the requirements. (2) one needle per pig. Strictly guard against the method of injection in the end. It is best to change a needle for each pig injected. (3) Emergency vaccination sequence. Emergency immunization should be carried out in the order of relatively clean group, assumed health group, threatened group and disease group. The disease group was carried out in the order of asymptomatic, mild symptoms and severe symptoms. (4) Safety science
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