Sheep lung nematode disease, what are its clinical signs?

Sheep lung nematode disease is a disease caused by nematodes parasitic in the trachea, bronchi, bronchioles and even the lung parenchyma, with bronchitis and pneumonia as the main symptoms. Pulmonary nematode disease is widely distributed in China and is one of the common helminthiasis in sheep. It can cause development disorders, reduce the quality of livestock products, and cause death, causing great economic losses to the sheep industry.

Sick sheep are depressed, their appetite is reduced, their coat is dry, they are anemic and emaciated, and they can't keep up with the herd; cough, especially noticeable during night breaks; sneezing, sometimes squirting white nematodes; Discharge of viscous discharge from the nostrils, some of which are very viscous, cord-like, hanging under the nostrils, and some of which are bloodshot; Have pica, swallow clods, plastic sheeting, etc.

Based on epidemiological investigation and clinical symptoms, fecal worm examination can confirm the diagnosis by finding a large number of larvae. The diagnosis is also confirmed by the discovery of a certain number of worms and corresponding lesions in the bronchi and trachea during postmortem autopsy. In the early stages of infection, larval migration causes damage to the walls of the intestinal mucosa, blood vessels, and lymphatic vessels.

Adult worms live in the bronchial and bronchioles, causing inflammation that can spread to peribronchial tissues and cause atrophy of lung tissue. A large number of parasites and their inflammatory products can block the bronchioles, causing pulmonary insufficiency. Sick cattle and sheep show cough, especially in the early morning and night, which is mostly paroxysmal, and often coughs up mucous masses quickly.

Affected animals often pass purulent discharge from their nostrils, which dry and form a crust around their nostrils. Anemia, edema of the cephalothorax and extremities. Rapid or difficult breathing.

Lambs and calves had obvious symptoms, and in severe cases, they died. Adult cattle and sheep have mild symptoms.

Pinworm disease has the characteristics of children's collective aggregation and family aggregation in distribution, so it should be taken collectively at the same time to achieve the purpose of **.

1.Internally take embovidium.

2.Piperazine. 3.Benmidazole or flubendazole and thiethylpine.

4.Medicinal herb**.

5.Pinworm ointment, white mercury ointment and other topical drugs.

Take precautions during grazing: avoid grazing in areas with stagnant water or low humidity; Adopt the rotational grazing method, when conditions permit, rotational grazing every 6 days; A small amount of anthelmintic is added to the feed every other day to kill larvae that invade the intestines. In the early stage of infection and mild infection, the symptoms are not obvious.

When a large number of worms are infected, a short, dry cough begins after 1 to 2 months. At first, a few sheep coughed in a few sheep, but later spread to the majority, and the number of coughs gradually increased. Coughing is more pronounced after exercise and during nighttime rest.

Near the sheepfold, it can be heard that the affected sheep have difficulty breathing, etc. It is common to have viscous fluid coming out of the nostrils of sheep, which turns into crusts when the liquid dries, and there are wet rales in the lungs on auscultation. Sheep that have been sick for a long time show a decrease in appetite, a thin body, and a dry and coarse coat.

When grazing, he prefers to lie on the ground and does not want to walk. As the disease progresses, diarrhoea and anemia develop, and edema develops in the eyelids, jaw, underchest, and extremities. He eventually died of severe emaciation.

When the worm body and mucus become entangled and clog the throat, it can also die due to suffocation. In severe infection, the mortality rate is 10% to 70%.

Regular preventive deworming twice a year, once in autumn and once in winter. **There are many ways to administer it, such as levamisole, which is 8 mg per kilogram of body weight orally once; 5-6 mg per kilogram of body weight once intramuscularly or subcutaneously. Hydrazide phosphate is orally administered once per kilogram of body weight for 5 days or cyanoacetyl hydrazide is given 17 mg orally once per kilogram of body weight for 3-5 days, or 15 mg per kilogram of body weight can be given as a one-time intramuscular injection or subcutaneous injection.

Iodine solution tracheal injection, the formula is prepared with 1 gram of iodine tablets, 1500 grams of potassium iodide, 1500 ml of distilled water, 3 grams of procaine, boiled for later use. Lambs are injected 8-10 ml into each lung and adult sheep 10-20 ml slowly. Inject the other side after 1-3 days:

Now there are new drugs: anti-peristalsis (also known as prothiobendazole) and the new toluene beer, which are more effective.

It mainly harms lambs, resulting in stunted growth and development, and reduced product quality. Caused by sheep reticulated nematodes, the shape is milky white filamentous, the male is about 30 mm, the female is slightly longer, oval-ovate, and has developed larvae. Females lay eggs in the bronchi, and the eggs have developed larvae, which are "ovoviviparous" phenomena, and the eggs are swallowed into the digestive cavity with the coughing human mouth, and some are excreted to the outside world with oral and nasal secretions

As a result, the eggs hatch in the digestive tract and are excreted in the stool. The environment is suitable for developing into invasive larvae after two molts, and the humid environment survives for a long time. After the sheep is eaten, it develops through the lymphatic system and flows from the blood to the alveoli, bronchioles, and bronchi to develop into adult worms.

The whole journey takes about 26 days, but the survival time of adults in sheep depends on the strength of their physique, and the living time is 2-12 months.

Sheep lung nematode disease is a disease caused by the parasitism of nematodes of the genus Reticuloceridae and Protocyclodae and Müllerian in the respiratory organs of sheep. The worm body of the reticulocarpus family is large, and the disease caused by it is also called large lung nematode disease. The worms of the Protocycloceae family are small, and the disease caused by them is also called small pulmonary nematode disease.

The occurrence of netthorn nematode disease in cashmere goats in Liaoning is relatively common. Sheep reticulocerode disease is caused by filamentous reticulosus nematodes (parasitic in sheep) of the genus Reticulosa. They live in the trachea, bronchi.

For this disease: 1, **; Prothimidazole: 5 10 mg per kilogram of body weight in sheep, taken internally, the effect is very good. Ivermectin or avermectin, sheep per kilogram of body weight, 1 oral or subcutaneous injection. Levamisole in sheep 8 10 mg per kilogram of body weight, 1 oral dose.

2. Prevention; In endemic areas, deworming should be carried out twice a year, once in spring and autumn. Do not graze in moist swampy areas. Pay attention to drinking water hygiene, do not drink stagnant water, drink running water or well water. The manure is treated with bioheat.