Prevention and control technology of mink disease: prevention and control technology of raccoon dog disease
The disease is an acute, highly contagious disease caused by a virus. The main feature of the disease is severe dysentery, including gray-white exfoliated intestinal mucosa, fibrin mucus mass, significant leukopenia and severe gastrointestinal inflammatory changes in feces.
1. The original pathogen of the disease is enteritis virus, which has the main characteristics of small virus group. From the point of view of the virus, enteritis virus is related to feline panleukopenia virus, and their respective vaccines can be immunized and protected, but the protection against canine parvovirus enteritis is poor.
2. Popular characteristics
The main source of infection of the disease is raccoon dog, bear raccoon dog (at least with virus, detoxification for more than a year). Cats with panleukopenia, raccoons with viral enteritis and dogs with parvovirus enteritis can all cause parvovirus enteritis. It is mainly transmitted directly or indirectly through digestion and respiratory tract, and can also be spread by feces, urine and saliva of sick raccoon dogs. Susceptible animals are infected due to pollution of feed, water appliances and the environment.
The disease is often endemic in the young raccoon dog group, with an incidence of 50% to 60%, with a fatality rate of up to 90%. The morbidity and mortality of adult raccoon dogs are generally about 20%, and are mostly chronic and recessive infection. Raccoon dogs can gain immunity for a long time, but they still carry the virus, which is the most dangerous source of infection.
Most of the disease occurs from June to October. If no effective measures are taken, it will cause endemic epidemic, so that it will occur again in the young raccoon dog group before and after nesting in the second year.
3. Clinical symptoms
The incubation period is generally about 5 days, and death occurs the next day after acute onset, with the most at 4-14 days, and gradually becomes subacute or chronic after 15 days.
The earliest symptoms of raccoon dogs are loss of appetite or abstinence, depression, lack of luster, increased cravings, and sometimes vomiting. Defecation at the beginning of soft thin mucus, showing gray-white, a few bright red, reddish brown, gradually showing a yellowish green water sample, sometimes with striped blood stains in the feces. With the aggravation of the disease, there are many kinds of colored mucous membrane in the feces, and the thickness of the exfoliated mucosa varies, showing gray, yellow-white, white, cheese color and black coal tar. In patients with severe diarrhea, it is often acute and severe, and in the later stage, most of them are extremely weak and emaciated, eye sockets collapse and finally die of failure; raccoon dogs after recovery, such as relapse, have a poor prognosis. White blood cells decreased significantly, and most cases were aggravated by Escherichia coli and salmonella.
4. Anatomical and pathological changes
It is characterized by acute intestinal catarrhal, cellulosic and hemorrhagic enteritis. The small intestine often shows acute hemorrhagic inflammation, the intestine is mixed with dark red blood sample content, the appearance is blood intestine sample, and some intestine content is yellowish green water sample. After subacute or chronic death of raccoon dogs, there are fibrinoid necrotic lesions in the intestinal wall, most of the mesenteric lymph nodes are swollen, part of the spleen is swollen, the gallbladder is full of bile, and the liver is tan and fragile.
5. Diagnosis
According to epidemiology, clinical features and leukopenia can make a preliminary diagnosis, diagnosis, specific hemagglutination and hemagglutination inhibition diagnostic techniques or virus isolation and identification.
6. Prevention and treatment
Anti-viral enteritis vaccine is vaccinated regularly every year to control the occurrence of the disease.
At ordinary times, the hygienic management of feeding must be strengthened, the introduction from epidemic areas should be strictly controlled, and the introduction from non-epidemic areas should also be isolated and observed, and then mixed breeding should be confirmed after health.
Raccoon dog viral enteritis vaccine can be used for emergency vaccination, and antibiotics can be used for symptomatic treatment to control the secondary infection of bacteria.
- Prev
To judge whether the dog is really pregnant.
Signs of pregnancy in a bitch appear about a week after mating. The specific manifestations are as follows: the vagina of the pregnant female dog will contract rapidly, and pregnancy reactions such as vomiting and loss of appetite may occur in three or four weeks of pregnancy. on the 20th and 30th day of pregnancy, the breast is prominent, the breast is dilated, and the nipple is pink. The pregnant bitch can feel an embryo the size of an egg by touching the position of the womb in the belly of the bitch in the fourth week after mating. In addition, at 20-30 days after mating, veterinarians can be asked to take blood samples or ultrasonic diagnosis.
- Next
How to identify the health of big silkworms
First, when sniffing into the silkworm room, smell the smell of the silkworm room. If the silkworm room has only the fresh smell of mulberry leaves, but no other peculiar smell, it shows that the silkworm is disease-free. Second, after listening to mulberry with your ears, if you hear the sound of silkworms eating mulberry like a light rain, it shows that the big silkworms are healthy. Third, observe the body color of silkworms with your eyes, and the body color of healthy silkworms is generally blue and white. The skin of eating silkworms is tense and shiny, and the action is lively, raising the head and chest at rest; the dorsal vascular segment beats rhythmically; the population develops in the same size; feces have a certain shape (except mature silkworms).
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