Identification and control of burdock burdock burdock, also known as rotten intestinal fistula, gallbladder bulging fistula, is caused by a burdock virus septic infection. The acute course is characterized by inflammatory necrosis of the mucosa (especially the digestive tract mucosa). Our country has basically disappeared.
Epidemiology calves have the highest susceptibility, followed by calves, cattle, goats, sheep, and camels. Deer and pigs also have susceptibility. The incidence rate is 100%, and the mortality rate is 90%.
The incubation period of clinical symptoms is 3 to 9 days and up to 15 days.
Acute type: sudden increase in body temperature, the next day reached 41 ~ 42 °C, the initial excitement, depression, attack, and then depressed, desperation of the nose, increased thirst to eat, rumination slow or stop. Less manure and dryness, less urine, darker color, increased respiratory and heart rate, high degree of conjunctival flushing, pseudo-membrane on the surface, turbid cornea, swollen eyelids, tearing (returned purulent), and finally smeared or slightly brownish. Nasal flushing has a bleeding point, transparent mucus, purulent after the change. The mucous membranes are more characteristic: menarche, lumps increase as filiform outflows, and soon the surface appears gray or gray millet-like large projections, initially harder, later soft, like bran; small projections melt into a layer of uniform gray or The yellow capsule is loosely adhered and easily peeled off, and the red spots are easily exposed to the membrane. The edges of the macules are irregular and may develop into deeper ulcers. When the body temperature drops, it will cause diarrhea. The feces will be tainted with blood and may be mixed with fragments of mucous pseudomembrane. There are more urine and less, pale yellowish red or dark brown.
Cow vulva redness, vaginal mucosa congestion, discharge purulent secretions, sometimes mixed with blood, mucous membranes have gray or yellow small pods fall off, leaving dark red easily bleeding spots.
From the disease to the late period, she quickly lost weight. Eyes are bleak, there is purulent eye stains, the nose is dirty, and the mouth is foamy. Difficulty in breathing, licking, tremors in the body, row of excrement, and convulsions due to failure. Within 1 to 7 days of the disease, symptoms appear all 3 to 4 days after the fever.
Atypical: not all typical symptoms, mainly gastrointestinal dysfunction, respiratory tract-based, shorter course, may also be extended. Particularly frequent and often endemic areas often appear through the setback type, that is, 3 to 4 days of discomfort and moderate fever, accompanied by gastrointestinal catarrh symptoms and healed.
The main features of pathological changes in the digestive tract, oral mucosa (except the front of the tongue), pharynx, esophagus can be seen congestive, rotten spots, pseudomembrane, rumen, valve mucosa also have bleeding and rotten spots, especially in the pylorus Brick red, dark red and purple red in different colors, mucous membrane swelling, submucosal edema, with small round or strip-like bleeding, the latter at the top of the folds, lentils covered with pseudomembranous patches. The mucosa of the small intestine is highly flushed, sometimes with surface necrosis and punctate or sticky bleeding. The ileocecal valve had hemorrhage, the colorectal changes were the same as those in the small intestine, and the collecting lymph nodes and isolated lymphoid follicles were prominently swollen. The rectum is highly swollen and dark red, and the liver is generally unchanged. The gallbladder is swollen, full of bile, sometimes mixed with blood, and the mucosa has small bleeding points. The spleen is normal. There are catarrhal swellings in the renal pelvis, bladder, and sometimes small bleeding. Brown urine, intracardiac, epicardial hemorrhage, and softer myocardium. The respiratory mucous membranes are swollen and swollen, with a bit like and sticky bleeding. Nasal, laryngeal, and tracheal mucosa were covered with pseudomembranous plaques. The lungs are usually normal or only partially congestive.
Diagnostic guidelines spread rapidly, often up to 100%, body temperature 41 - 42C, high conjunctival hyperemia, pseudomembranous, purulent sputum, nasal mucosa flushing with a bleeding point, nasal purulent after the initial viscosity, after the dirty gray or micro brown. The mucous membranes of the mouth are flushed, with gray or gray millet-like protrusions, fused to irregular irregular spots on the edges, covered with gray or yellow capsules. The temperature drop is diarrhea, mixed with blood, mucus pseudomembrane debris, odor, urine yellow or dark brown. The necropsy revealed that the mouth, pharynx, esophagus, rumen, valve-stomach, and abomasum mucosa had congestive and erotic lesions, pseudomembranous membranes, high flushing of the small intestine mucosa, surface necrosis, and spots or strips. The large intestine was the same, and the gallbladder was swollen. The mucous membrane has a bleeding point, contains a large amount of bile, and is mixed with blood. The renal pelvis and bladder are swollen with bleeding spots, and the nasal, pharynx, and tracheal mucosa have rotten spots and are covered with pseudomembranes.
A 10-fold dilution was used to inoculate the rabbits with fresh lymph nodes and spleen of diseased cattle. After 10 to 14 days, inoculation of burdock rabbits for cross-immunity tests was a good method for diagnosing burdock.
Identification of diseases
1. Bovine malignant catarrhal fever similar place: contagious, high body temperature (41 ~ 42 °C), mucous membrane congestion and necrosis, ulceration, diarrhea odor, cow pour flush swelling, tears. Different places: mostly scattered, and have close contact with sheep, diffuse keratitis and fibrinous iritis, facial swelling.
2. Foot-and-mouth disease similarities: contagious, rapid spread, high body temperature (40 ~ 41 °C), oral erosion, runny nose. Different places: There are blisters in the mouth and hooves, and the eyes and nose are not inflamed, and no odor and feces are excreted.
3. Bovine viral diarrhea and mucous membrane disease are similar: contagious, high body temperature (40 - 42C), mouth mucosa with erosion, runny nose, diarrhea, fecal odor. Different places: The spread is relatively slow, the acute incidence rate does not exceed 2%, and the chronicity does not exceed 20%. It is often accompanied by laminitis, and the hooves are eroded.
4. Infectious salivary stomatitis similar place: contagious, high body temperature (4041 °C), mouth mucosa erosion, runny nose. Differences: After the rupture of the mucous membrane of the mucous membrane, the surface of the ulcer surface remained free of pseudomembrane coverage, no inflammation and secretion of the nose, no discharge of odor and feces, and water in the hoof. The horse is also affected.
Control measures have not taken place. The burdock area should strengthen quarantine and prevent the transmission of people. If the disease is seen in the area, it should be blocked immediately and reported to the superior veterinary department. Disinfection of livestock houses and equipment, and treatment of diseased animals with anti-burdock serum, no other drug treatment. In the areas where calves are born, the animals are vaccinated every year.
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