Symptoms and Prevention and Treatment Methods of Swine Lungworm Disease

Swine lungworm disease mostly occurs in low-lying, damp areas and during summer and autumn, showing endemic prevalence. It mainly harms piglets, affecting their growth and development and reducing meat quality. Severe infection can cause pneumonia and lead to death.

Symptoms: When pigs have a mild infection, there are no symptoms or they are not obvious; with severe infection, the symptoms are pronounced. More than one month after infection, pigs show symptoms such as paroxysmal coughing, thick yellow mucus flowing from the nose, rapid breathing, pale conjunctiva, reduced appetite and weight loss. Some die of suffocation because the worms block the trachea.

Prevention: 1. Practice self-breeding and self-raising, and do not buy pigs from other places, so as to reduce the introduction of diseased pigs from outside. 2. Pig houses should be warm in winter and cool in summer, with attention to ventilation and preventing overcrowding, maintaining cleanliness and hygiene in the pig house, and attention to drainage and dryness, to eliminate the breeding of @#@254@#@. Pig manure should be removed promptly and composted for fermentation. 3. In areas where this disease is prevalent, 1% caustic soda water or 30% plant ash water can be used to disinfect pig houses and exercise yards. 4. Regular preventive deworming, 1 to 2 times each quarter.

Treatment: 1. Feed pigs 13 tablets of levamisole hydrochloride tablets (each tablet contains 25 mg) at one time. 2. Inject 6 mL of levamisole hydrochloride injection (Quchongsu) intramuscularly at one time. 3. Mix 2 vials of penicillin 800,000 international units, 4 vials of kanamycin sulfate injection 500,000 international units, 20 mL of compound aminopyrine injection, 5 mL of dexamethasone sodium phosphate injection, and 10 mL of Houttuynia cordata injection, and inject intramuscularly once a day for 3 to 4 consecutive days. 4. Tracheal injection. Mix 1.5 g of potassium iodide salt, 3 g of procaine, and 1200 mL of distilled water, then inject once into the trachea at 0.35 mL per kg of body weight. Inject once every 2 days; after 2 consecutive injections, inject once more after another 10 days. Method: Restrain the diseased pig in dorsal recumbency, raise the front part of the pig's body, and inject in the gap between the cartilage rings at the front 1/4 of the trachea. The injection process should be slow. After the injection is completed, tilt the pig's body upward, and after the medicinal liquid reaches the bronchi, lower the pig. Tracheal injection and intramuscular injection used together give better results. 5. Inject ivermectin subcutaneously once at 0.3 mg per kg of body weight, once a day for 2 consecutive days.