Epidemic bovine leukemia was first described by Knuth and Volkmann in the late 19th century. In 1969, Miller of the United States isolated leukemia virus from bovine blood lymphocytes. In 1974, the disease was also found in China and spread in China, causing serious losses to the cattle industry. The main symptoms of this disease […]
Frostbite of breast Dairy cows have no hair and the skin is thin, a large area of contact with air, low temperature, strong wind, cold bed and lying on the ground, and improper use of non-winter nipple disinfectant can easily cause frostbite. Frostbite causes chapped breast (head) skin of dairy cows. It is easy to […]
Usually, calves are within six months of age, which is also the fastest-growing stage of them. Because the organs of calves in this period are still in the stage of development, so the autoimmune ability is not perfect, and there is no strong resistance to pathogens in the external environment so that calves are susceptible […]
Actinobacteriosis is caused by Actinobacillus Linnaeus infecting soft tissue of head; actinomycosis causing osteoporotic periostitis of upper and mandible; malignant edema caused by Clostridium Septicum; alveolar periostitis is a serious periodontal disease with secondary infection, which occurs in cow baby with unknown etiology; submandibular abscess is caused by cyanobacterium pyogenesis; Drug appliances can cause perforation […]
The dairy fluffy cow can be infected by four kinds of lipid mites (scabies, foot mites, itchy mites, Demodex), six kinds of lice, skin worms, maggots (spiral maggots) and various flies. Parasitic dermatosis is most common in dairy cows fed in winter. Many skin diseases can not be differentiated according to clinical symptoms but must […]
Bronchopneumonia, also known as lobular pneumonia, can cause inflammation of the bronchi or bronchioles along with the pulmonary lobules. Many pathogenic factors can cause the disease. The main pneumonia symptoms are that the alveoli of bronchioles and a few pulmonary lobules are filled with inflammatory exudates such as white blood cells and epithelial cells, showing […]
At present, in the process of dairy cattle raising and production, the occurrence of hoof leaf inflammation is relatively common, and in the dairy herd mainly young cows and cows with lower parity are more prevalent, most of them are sporadic, but occasional mass outbreaks occur in clinic. In the actual clinical feeding process of […]
Epidemic characteristics Clostridium welchii in dairy cows is mainly caused by pollution of the environment, drinking water, feed and so on. When dairy cows are fed, bacteria or spores will enter the intestinal tract and multiply in large quantities, resulting in the occurrence of Clostridium welchii. Besides, sudden changes in climate and feeding environment, or […]
Salt is a mineral feed, which is an important component of gastric juice. It plays an important role in promoting gastrointestinal digestion, maintaining the volume and osmotic pressure of intracellular and extracellular fluid of the body, and is very important for dairy cows. But it is related to many diseases of dairy cows, which can […]
Osteomalacia of dairy cows is a chronic nutritional metabolic disease, which is caused by the lack of calcium, phosphorus or the unreasonable ratio of the two feedstuffs, resulting in the disorder of calcium and phosphorus metabolism and bone decalcification. The main clinical features are digestive disorders, soft bones, deformed hoofs, abnormal limbs, and lameness. If […]
Tetanus is an acute and poisonous human and animal infectious disease, which is caused by Clostridium tetanus infection through trauma. It is also called umbilical cord wind, lockout, ankylosis, etc. The main characteristic of diseased cattle is that the body's skeletal muscle or some muscle groups continue to appear tonic spasm, and will show obvious […]
Heterophilia in dairy cows is a stubborn disorder of taste, which is caused by metabolic dysfunction, resulting in abnormal taste, thus appearing the phenomenon of licking and gnawing, the main characteristic of which is eating foreign bodies. The disease usually occurs in cows fed in the house in winter and early spring. The disease usually […]