In the process of breeding, cattle often get skin diseases due to environmental factors. For example, burdock disease is caused by parasitic mites in the surface or epidermis of livestock. Itching and various types of skin inflammation are characterized by chronic skin diseases. The disease is highly contagious and can quickly spread to the entire herd after the onset of the disease, causing serious damage to the farm.
First, the pathogen of burdock
The morphological form of the worm is round, yellowish white, the back is raised, the ventral surface is flat, and there is no obvious transverse joint on the body surface. The body is divided into two parts: the front has a first pair and a second pair of feet on the back chest; the back has a third foot and a fourth foot on the back abdomen. The back of the body has fine stripes, cones, conical scales and bristles. There is a pair of short vertical bristles behind the fake head. There is a rectangular breastplate on the back chest. The anus is located on the edge of the back end of the back abdomen. There are four pairs of short and short feet on the ventral surface of the body. The distance between the two pairs of feet is far. Each pair of feet has horny branches. The suction cup on the foot is bell-shaped. The mouthpiece consists of a pair of ankle limbs and a pair of conical limbs.
Second, the symptoms of burdock disease
It usually begins on the back of the head, under the eyes, and behind the ears, to the back, to the sides of the torso, to the inside of the hind limbs, and to the whole body. As the snail snail penetrates the host skin with its mouthparts and excavates the tunnel, it stimulates the nerve endings, causing itching and inflammation. Sick animals often rubbed with limbs or rubbed at corners, column grids, etc., not only destroying the skin tissue and causing serous infiltration of the tissue, causing papules and leeches on the skin. After the leeches and abscesses rupture, they dry up on the surface of the skin and become idiot. When the condition is severe, the body hair falls off, and the stratum corneum of the skin is thickened, dry, wrinkled or cracked. The sick animal has a loss of appetite, slow growth, gradual weight loss and even death.
Third, the diagnosis of calf disease
Diagnosis is based on clinical symptoms such as itching, skin thickening, ecstasy, hair loss and weight loss. In addition to the clinical symptoms, it must be checked, and the worms can be diagnosed.
1. Live insect inspection. Use a round knife to scrape the dandruff at the edge of the affected area (ie, the joint between the affected part and the healthy skin), the depth of which is scraped until it will bleed. Then put the skin on a blackboard or blackboard, and then heat the paper or black paper on the lamp. Use a magnifying glass in the sun or in the sun to check for any live cockroaches crawling. The warm water test method uses the larval separation method device, and the scraping object is placed in a copper sieve on a funnel containing 40 ° C warm water. After 0.5 to 1 hour, due to the warming effect, the snail worms climb out of the integrated skin. The sediment was taken at the bottom of the tube for microscopic examination.
2. Low-magnification examination Use the appropriate amount of dandruff scraped on the glass slide, add a few drops of 50% glycerin water, liquid paraffin or kerosene, mix thoroughly with a toothpick, spread a thin layer, add a cover glass low Mirror inspection.
3. Centrifuge the pellet. If it can't be detected, put a lot of scraped dandruff into the test tube, add 5%-10% KOH or NaOH solution for 2 hours or boil for a few minutes, then centrifuge to take the sediment to check the worm body. Diagnosis can be made if eggs, larvae or adults are found.
Fourth, the prevention of calf disease
1. Regular inspection of herds and mites;
2. Newly introduced livestock should be carefully inspected and raised in groups when identified as disease free;
3. Keep the light house dry, dry and ventilated;
4. Diseased animals are treated in isolation. Note that once a treatment of eggs can not be killed, it takes a few days for the larvae to be treated again.
Five, treatment of calf disease
1. Topical drugs.
1 organophosphorus insecticides such as trichlorfon, phoxim, fly poison net, 9 net: trichlorfon: 1% - 2% solution sprayed the body or scrub the affected part, used again after 10-14 days: çž’Net: 0.025%.
2 double armor fat 12.5% ​​cream agent. Note: Since the general insecticides are toxic, the area of ​​rubbing should not exceed 1/3 of the whole body during local application: the general drug is only effective for worming and cannot kill eggs, so it should be based on the development of the snail. It should be better to use the drug again every 5 to 7 days.
2. Injection.
1 ivermectin. 0.3 mg/kg body weight for subcutaneous or intramuscular injection:
2 doramectin. Intramuscular injection of 1 ml / 33 kg body weight.
The above is the diagnosis and treatment of burdock disease. If you want to know more about cattle raising technology, please pay attention to Hui Nong School!
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