Ascariasis in dogs 1. Ascariasis in dogs is a disease caused by Ascaris lumbricoides and Ascaris lionis. Canine roundworms mainly affect puppies 1-2 months of age, while lion roundworms are found in dogs over 6 months of age. Both types of roundworms excrete their eggs in the feces of sick dogs and develop into invasive eggs in 3-5 days under proper temperature and humidity. Symptoms: The sick dog shows emaciation, pale mucous membranes, loss of appetite, vomiting, and retarded development. Large numbers of parasitic roundworms can cause intestinal obstruction or blockage of the bile duct. Due to the action of roundworm toxin can also cause epileptic-like neurological symptoms . Diagnosis: According to the clinical symptoms, and then take the stool to check the eggs by saturated salt water floating method can be determined. Treatment: Levamizole hydrochloride, 10 mg per kg body weight orally, is very effective. Canine filariasis 2. Canine filariasis is more common and is a parasitic filarial worm in the right ventricle, also known as a heartworm, 25 cm long and white thread-like. Adult females mate with males in the ventricle to produce embryonic microfilariae. The larvae flow under the skin with the blood and enter the insect’s body to develop when the mosquito or flea bites and sucks the blood, finally reaching the salivary glands and mouthparts. Symptoms: The adult worms roll with the blood flow in the right ventricle, mechanically causing cardiac dysfunction or endocarditis; microfilariae may obstruct blood vessels in the kidney, brain, and lungs. In general (less than 25 adult worms), there are no obvious symptoms, but in severe cases, there may be chronic cough, easy fatigue, dyspnea, dry cough; right heart failure, enlarged liver and spleen, ascites, swelling; hematuria; small nodules (containing microfilariae) or ulcers on the skin (especially in the auricle). Diagnosis: One milliliter of blood with 7% acetic acid or 5 milliliters of 1% hydrochloric acid solution, centrifuge for 2-3 minutes, take the precipitate for microscopic examination, and find microfilariae for diagnosis. Treatment: 0.5-5 ml of dibofen, injected intramuscularly or intravenously daily until the blood test larvae disappear. About 1/3 have poisoning symptoms. Hai Qun Sang 60-70ml/kg body weight or 30% solution for one intramuscular or subcutaneous injection for 3-5 weeks. Sodium thiosemicarbazone 2.2 mg/kg body weight, twice a day, slowly injected intravenously for two days. Dichlorphenarsine hydrochloride 2.5 mg/kg body weight, diluted in distilled water into 1% solution and injected slowly once every 4-5 days. Trichinosis 3. Because trichinosis is widely parasitic in human, dog, pig, cat, rat and other animals, and dogs have the habit of eating animal carcasses or feces, so there are many opportunities for dogs to be infected in agricultural and pastoral areas. Trichinella parasitizes in the transverse muscles, especially in the septum and intercostal muscles where there is a lot of activity. The adult worms mate in the intestine, and the larvae produced enter the thoracic duct through the mesenteric lymphatics to the right heart, and then pass through the lungs into the body circulation and follow the blood flow to the whole body (at this time is the 12th – 30th day after infection). Only larvae that have reached the muscles develop and grow, surrounded by a capsule in which the worm is coiled. Symptoms: generally not obvious. In severe cases, muscle pain, difficulty swallowing, chewing and walking can occur. Prevention and treatment: The key is to pay attention to the infection link and understand the dangers of contact between humans and animals and flesh-eating infections.
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