Canine herpes virus infection is mainly an acute fatal infectious disease in young dogs. Impacting the breeding of dogs can often lead to serious economic losses. This disease has attracted people's attention since the virus was first isolated in the United States and the United Kingdom in 1965 and its disease was determined.
Generally speaking, puppies are characterized by systemic bleeding and necrosis, while dogs over 3 weeks of age mainly show symptoms of upper respiratory tract infection.
1. Causes of canine herpes virus:
1. The pathogen of this disease is canine sore rash virus type I, which is weak in resistance to high temperatures and can kill the virus within 56 degrees Celsius for 4 minutes. But it has a strong resistance to low temperatures. In an acidic environment (pH 4.5), the virus can lose its pathogenicity after 30 minutes.
2. The virus can be excreted out through saliva, nose juice and urine.
3. This disease is mainly infected by droplets. During delivery, the fetus may also be infected if it comes into contact with vaginal secretions from a poisoned mother dog.
2. Key points of diagnosis of canine herpes virus:
The epidemic characteristics of this disease are: canine herpes virus only infects dogs, and it mainly causes fatal infection in puppies within 2 weeks of age. Puppies over 3 weeks of age and adult dogs have mild symptoms and are mainly invisible infection. The clinical characteristics are as follows: After
1 and 2 weeks of age, the temperature of the dogs are often not elevated, but they are mentally irritated, have poor appetite or stop eating milk. Difficulty in breathing, abdominal pain, vomiting, yellow-green feces discharge, and sick dogs often howl continuously. Mostly die within 24 hours after clinical symptoms occur. Some resistant puppies often leave ataxia, perform neurological symptoms such as circular motion to one side and blindness.
2, 3-5 weeks of age, and adult dogs often do not show systemic symptoms after infection, but only cause mild rhinitis and pharyngitis, mainly showing upper respiratory tract symptoms such as runny nose, sneezing, and dry cough. Experiments have shown that the virus can slightly proliferate on the respiratory and reproductive tract mucosa of these sick dogs and become a source of infection.
III. Pathological and necrosis characteristics of canine herpes virus:
1. Typical lesions in puppies are: on the surface of parenchymal organs, there are many off-white necrotic foci and small bleeding points with diameters of about 2 to 3 mm, especially the changes in the kidneys and lungs are more obvious. Bloody serous fluid remains in the chest and abdominal cavity. The spleen is enlarged and the intestinal mucosa is bleeding a little.
2. Usually, based on the above clinical characteristics and pathological anatomical changes, combined with the prevalence characteristics, a preliminary diagnosis can be made. The final diagnosis depends on virus isolation or serological tests.
4. Prevention measures for canine herpes virus:
1. There is currently no special vaccine for this disease.
2. To prevent this disease, comprehensive measures are mainly taken, such as not buying dogs from groups of dogs that often have respiratory organ diseases.
3. Isolate the sick dog in time if it is found. Use broad-spectrum antibiotics to prevent secondary infection. Strengthen disinfection and strengthen feeding management.