Pig farmers should be familiar with pig stomach nematode disease. Porcine stomach nematode disease is a round scorpion worm (Spirulina sinensis), a scorpion worm, a genus Heterophyllum, a genus of the genus Simian elegans and a genus A nematode disease caused by the parasitic nematode of the genus Sakaguchi and the nematode (the pathogenic nematode) of the genus Sakaguchi in the stomach. Porcine stomach nematode disease is very unfavorable for pig breeding. Improper control can easily cause pigs to lose. The following Hui Nongwang Xiaobian compiled the symptoms diagnosis and prevention measures of pig stomach nematode disease, and learn together.
First, the characteristics of the body and life history
Round scorpion nematode, the worm body is slender and light, red, and the pharyngeal wall is spiral-shaped horny horny thickening, so it is also called snail pharynx. The male is 10-15 mm long and the female is 16-22 mm long. The worm has a nematode, the male is 25 mm long and the female is 55 mm long. The male larvae of the six-winged larvae are 6-13 mm long and the females are 13-22.5 mm long. The singular Simon's nematode is 12-15 mm long, linear and posterior spirally rolled; the female is 15 mm long, and the front part of the front is swollen and spherical. The fresh worm has a reddish color, and the skin is thin and red. It can see the white reproductive organs in the body. The head is swollen and spherical. The body of the worm has small spines. The males are 15-25 mm long and the females are 22- long. 45 mm. The Dow's nematode is 10-12 mm long and the female is 16-20 mm long. There are small spines in the body.
After the eggs of the round-shaped nematode and the larvae of the genus Pleurotus are excreted with the feces, they are swallowed by the intermediate host, the stag beetle, the genus, the genus, the genus, and the genus. When the day is above the infection stage, the pigs swallow the infected beetles (the larvae of the first larvae form cysts in other animals or guano, reptiles) or the storage host containing the cysts (the middle of the nematodes) The host is Swordfish, fish, and the infectious larva enters the stomach of the pig. The head penetrates into the mucosa of the stomach wall and gradually develops (about 6 weeks) as an adult. The larvae of the nematode can also migrate to the liver and other organs, but cannot continue to develop and die.
Second, epidemiology
Pigs of all ages can be infected, but mainly piglets and shelf pigs. Lactating sows are more infected than lactating sows. Sows that stop breastfeeding have self-healing, but this phenomenon can be delayed or inhibited due to poor constitution. Boar infections are similar to non-lactating sows. Suckling pigs are less likely to be infected because they have less chance of exposure to infectious larvae. Infections mainly occur in contaminated wet pastures, drinking areas, playgrounds and pens. Orchards, woodlands, and low-humidity areas can all be sources of infection. Pigs are kept in a dry environment and are not susceptible to infection.
Third, clinical symptoms
The worm invades the gastric mucosa to suck blood, and there are few abnormalities during parasitization. Most parasitism or gastritis due to other reasons, the pig is weak, anemia, nutritional status decline, dysplasia, and mixed black stool. Appetite increases without decreasing, sometimes squatting. In sick pigs, especially young pigs, most of the parasitism, inflammation of the gastric mucosa, loss of appetite, increased desire for thirst, abdominal pain, vomiting, weight loss, anemia, acute and chronic gastritis. Insufficient spirits, nutritional disorders, impaired growth and development, blackening of feces or mixed with blood.
Fourth, pathological changes
There is a firmly attached worm on the stomach wall. When the larva invades the gastric gland, it causes small bleeding at the bottom of the stomach and hypertrophy of the stomach gland. Adults can cause chronic gastritis, which is significantly thickened and forms unplanned wrinkles. The stomach has less contents and a large amount of mucus. The gastric mucosa, especially the mucosa at the bottom of the stomach, is red and swollen, with small bleeding spots. There are large round nodules of lentils with yellow pseudomembrane, thickened mucous membranes and irregular wrinkles. There is mucus. In severe infection, extensive ulcers occur at the bottom of the stomach, and the ulcer develops deep into the stomach to form a perforation. In adult sows, gastric ulcers can develop deeper, causing gastric perforation and death.
Fifth, diagnosis
The eggs were found by sedimentation and confirmed by combining clinical symptoms and finding the worms at the time of necropsy. Under normal circumstances, it is difficult to diagnose before birth. At the time of diagnosis, it should be distinguished from pig stomach ulcer disease, acute and chronic gastritis, hookworm disease, whipworm disease. The diagnosis can be confirmed by combining clinical symptoms, necropsy changes, and examination of feces (floating method). It is also possible to cultivate the eggs in the feces as the third stage larvae and then identify them.
Sixth, prevention
Improve feeding management, give full-price feed, clean and disinfect pig houses, sports grounds, properly handle feces, keep drinking water clean, and preventive and therapeutic deworming. Do not plant poplars near pig houses and pig farms, so as to prevent the chafers from being swallowed by the pigs when they eat the leaves, or if the pigs swallow the larvae of the chafers, so that the pigs do not have the intermediate host sites such as sword otters and beetles to avoid infection. . The pig manure is cleaned daily and transported to the storage yard for accumulation and fermentation. There are plans to prevent deworming on a regular basis.
1. Trichlorfon 0.1 g per kilogram of body weight orally or mixed.
2. Ivermectin is injected subcutaneously with 0.3 mg per kilogram of body weight.
3. Sodium fluoride is mixed in the feed at a ratio of 1%.
4, levamisole hydrochloride injection 7.5 mg / kg per kilogram of body weight, muscle or subcutaneous injection, or levamisole phosphate tablets per kg body weight 8 mg / time, mixed drink or oral. It was administered once more every 2-4 weeks.
5, thiabendazole tablets per kilogram body weight 50 mg / time, once a day, once every 3 times.
6, albendazole (anti-creep sensitivity), according to 10-20mg / kg body weight medication, 1 oral.
7. Sulfamidazole, administered at a dose of 3 mg/kg body weight, once orally.
8, dichlorvos slow release agent, according to 10-20mg / kg body weight medication, 1 oral.
9, Lei Wan, scorpion, betel nut, gentian, rhubarb each equal, a total of research into fine, 1 serving 15 grams (above the amount of 25 kg of pigs).
The above is the symptom diagnosis and prevention measures of pig stomach nematode disease compiled by Huinong. The preventive deworming of pigs with pig stomach nematode disease can largely prevent pigs from getting sick.
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