Prevention and control measures for ascariasis

1. Check puppies once a month and adult dogs once a quarter.

2. When a sick dog is found, insecticide treatment should be carried out immediately: levamisole can be taken orally, 10 mg/kg body weight; mebendazole can be taken orally, 10 mg/kg body weight, twice a day, for two consecutive days; thiazide can be taken orally, 5-10 mg body weight /kg; piperazine can be taken orally, 100 mg/kg body weight. body weight, orally.

3. Clean and sanitary, and change the breeding environment: Careful attention should be paid to the cleanliness and hygiene of the environment, troughs, and food, and feces should be removed in a timely manner and fermented to eliminate sources of infection.

What is ascariasis

1. Canine roundworms (Toxocara canis) are light yellowish white in color, with three lips on the head and a narrow neck wing membrane on the side of the body.

2. Canine roundworm eggs are excreted in the feces and develop into infective eggs under suitable conditions.

Causes of ascariasis

1. After puppies under 3 months old swallow infective eggs, larvae hatch in the intestines. The larvae burrow into the intestinal wall and travel through the lymphatic system to the mesenteric lymph nodes. , then reach the liver through the blood flow, and then reach the lungs with the blood flow. The larvae pass through the alveoli, bronchioles, and bronchi, and then are swallowed into the stomach through the larynx. They further develop into adult worms in the small intestine. The whole process takes 4-5 weeks.

2. After an old dog swallows infected eggs, the larvae travel through the bloodstream to body tissues and organs, forming cysts. The larvae remain active but do not develop further. After a bitch with a cyst becomes pregnant, the larvae are activated and transferred through the placenta to the fetal liver, causing intrauterine infection. After the fetus is born, the larvae migrate to the lungs and then enter the gastrointestinal tract to develop into adults. Adult roundworms appear 23-40 days after the puppies are born.

3. Newborn puppies can also be super-infected by sucking colostrum. After infection, the larvae develop directly into adult worms in the small intestine.

4. Lion Ascaris eggs develop into infective eggs under suitable external conditions. After being swallowed by a dog, the larvae escape in the small intestine, burrow into the intestinal wall, develop and then return to the intestinal cavity, where they develop into adult worms in 3-4 weeks.

Clinical symptoms of ascariasis

1. Ascaris parasitizes in adult dogs, and its harm is not very obvious. However, puppies have a large number of roundworm parasites, and the intestinal wall is stimulated and causes various disorders. Sick dogs have symptoms such as gradual weight loss, pale mucous membranes, loss of appetite, vomiting, diarrhea and then constipation, abdominal distension, malnutrition and anemia.

2. Dogs often like to grab dirt, wood and other foreign objects, and occasionally have epileptic spasms.

3. Development is delayed. When the infection is severe, roundworms are often excreted in the vomit and feces, and the diagnosis can be confirmed.