Gastrointestinal nematode disease is a general term for parasitic diseases caused by various nematodes that parasitize the digestive tract. There are many species of digestive tract nematodes in cattle and sheep, often mixed infections, and are widely distributed. Common are twisted blood to nematodes, round nematodes, Schalbert nematodes and so on. It is characterized by gradual wasting, anemia, gastrointestinal tract, diarrhea, edema, etc. Serious infections can cause the death of cattle and sheep. Today Xiaobian introduces the symptoms of sheep gastrointestinal nematode disease, and the prevention and control method of sheep gastrointestinal nematode disease!
First, the symptoms of sheep gastrointestinal nematode disease:
1. Pathogens:
Twisted spear nematode is a major pathogenic nematode that parasitizes the true stomach and is occasionally found in the small intestine. It is a large insect body in the true stomach. The body is pink, with a thin tip, a small sac, and a dorsal spear inside. The male is 15–19 mm long and has an inverted "y" shape with the dorsal ribs of the cropped umbrella on the left. The female is 27-30 mm long and is commonly known as a twist worm because the red digestive tube and the white reproductive tube are intertwined, forming a red and white appearance. The pudendal gate is located in the posterior half of the worm body and has a thumb-shaped pubic lid. Colorless, thin shell; fresh eggs contain 16-32 embryo cells. In addition, Osteria elegans parasitizes the true stomach, Marshall nematode parasitizes the true stomach, Roundworm psitizes in the small intestine, occasionally parasitizes to the true stomach and pancreas, Fine-necked nematodes parasitizes in the small intestine or true stomach, Cooper nematode parasitizes in the small intestine, pancreas, and occasionally in the true stomach, and Willow-mouth nematode parasitizes in the small intestine. Esophageal-oral nematodes parasitize the large intestine, Shabert nematodes parasitize the large intestine, and Hairy nematodes parasitize the cecum.
2. Clinical symptoms
Sheep are often infected with a variety of gastrointestinal nematodes, and most nematodes feed on blood, so it causes host anemia, and the toxin action of the worm body interferes with the host's hematopoietic function or inhibits the production of red blood cells, making the anemia worse. Mechanical stimulation of the insect body causes damage to the stomach and intestinal tissues, and the digestion and absorption functions are reduced. Presents with high degree of malnutrition, progressive wasting, anemia, pallor of the visible mucosa, mandibular and abdominal edema, diarrhea or refractory diarrhea, sometimes blood in the stool, sometimes alternating constipation with diarrhea, depression, loss of appetite, and death from exhaustion. In particular, lambs and calves are stunted and have a high mortality rate. Most deaths occur during the "spring climax".
2. Pathological changes
Corpse wasting, anemia, edema. Organs through which the larvae migrate present with stasis and small bleeding spots. The stomach and intestinal mucosa are inflamed with bleeding spots, and the intestinal contents are brown or blood-red. Esophageal nematodes can cause intestinal wall nodules, and new nodules often have larvae (Figures 10-8). A large number of insect bodies are found in the stomach and intestines.
Prevention and control methods of sheep gastrointestinal nematode disease:
prophylaxis:
1. Regular preventive deworming: from late spring to late autumn, each sheep is given 0.5-1 grams of diphenyl sulfide every day, and evenly mixed with salt or concentrate to feed.
2. Try to avoid grazing in wet and low-lying areas and in the morning, late and after rain or when the larvae are active.
3, strengthen the management of breeding, pay attention to the sheep with full-price nutrition to enhance the body's resistance, the sheep should drink tap water, well water or clean water; strengthen the management of feces, the feces of the sheep must be accumulated and fermented to kill the eggs.
treat:
1. Refined enemy insects: sheep according to 80-100 mg per kilogram body weight, goats according to 50-70 mg per kilogram body weight, mixed into aqueous solution 1 time irrigation.
2. Deworming net (tetraimidazole): 10-20 mg per kilogram of body weight, 1 irrigation, or intramuscular injection with 5% solution, according to 10-12 mg per kilogram body weight.
3. Levamisole: 5 mg per kilogram of body weight, subcutaneous or intramuscular injection, or 1 irrigation.
4. Thibenedazole: 50-100 mg per kilogram of body weight, mixed with 10% suspension.
5. Propylthiobendazole: 5-10 mg per kilogram of body weight, evenly mixed into the feed for feeding, or mixed into a 10% suspension for irrigation.
6. Trimethoprim: 200 mg per kilogram of body weight, 1 subcutaneous injection.
The above is "the symptoms of sheep gastrointestinal nematode disease, sheep gastrointestinal nematode disease prevention and control methods!" "It's all there is to it! The main symptoms of sheep gastrointestinal nematode disease are poor nutrition in sick sheep, gradual emaciation and even anemia and diarrhea. For the treatment of gastrointestinal nematode disease in sheep, an appropriate amount of propylthionazole or avermectin can be taken for oral or intramuscular administration of sick sheep. At present, there are many types of sheep nematode disease, so it is found that sheep have nematode disease, and it is necessary to confirm the diagnosis to see if it is gastrointestinal nematode disease, so as to avoid misdiagnosis and mistreatment and delay the disease.