Prevention and treatment of viral diarrhea in dairy cattle

Cow viral diarrhea is also called mucositis. The disease belongs to the Flaviviridae plague virus genus. Most infections are recessive or mild and imperceptible. Acute infections are characterized by fever, anorexia, rhinorrhea, cough, diarrhea, wasting, leukopenia, inflammation and erosion of the digestive tract mucosa, and marked damage to lymphoid tissue.

clinical symptoms

Acute disease cattle suddenly onset, temperature increased to 40℃~42℃, only lasted 2 ~3 days, then decreased, some also showed a second temperature increase. As the body temperature rises, leukopenia lasts for 1 to 6 days, followed by an increase in the number of leukocytes. Anorexia, rhinorrhea, salivation, foul breath, usually severe diarrhea after oral mucosal damage, initial watery diarrhea, followed by mucus and blood, some cases of laminitis and skin erosion and necrosis between the toes, resulting in lameness Chronic disease cattle fever symptoms are not obvious, body temperature is slightly higher than normal temperature, chronic disease cattle generally do not diarrhea, the most obvious symptoms are erosion on the nose mirror, eye secretion and gingivitis and laminitis, skin erosion necrosis between the toes. Cattle infected with the disease usually develop severe immunosuppression between 7 and 14 days or until recovery, during which time they are very sensitive to secondary infections, which are easily caused by harmful bacteria (such as Pasteurella, Haemophilus lethargicus, Mycoplasma, etc.).

diagnosis

In case of severe outbreak, preliminary diagnosis can be made according to its history, symptoms and pathological changes, but less than 50% of sick cattle have clinical symptoms and pathological changes, most cattle only present subclinical infection or slight infection, so diagnosis is difficult to some extent. The final diagnosis depends on virus isolation and identification and serological examination.

prevention

1. Identification and culling of persistently infected sick cattle. Because of persistent infection of sick cattle through secretions to the body continued detoxification, if not eliminated will expand the disease.

2. Adhere to the principle of self-propagation and self-support. It is necessary to purchase cattle and avoid purchasing unquarantined cattle, effectively reducing the risk of introducing the virus.

3. Full immunization with the inactivated vaccine requires at least two initial immunizations at 30-day intervals to ensure adequate immunity.

treatment

1. Supplement water and electrolyte, protect gastrointestinal mucosa.

2. The application of astringent antidiarrheal strong heart rehydration can also shorten the recovery period and reduce losses.

3. Available antibiotics and sulfa drugs, such as strong cephalosporin + Wudu Tongmie + sodium bicarbonate intravenous injection; Li Bei Ling intramuscular injection.