Can Dog Heartworm Spread to Humans
📝 Summary
Dog heartworm can reach humans via mosquitoes but rarely matures in people, so human cases are uncommon and mild. The real risk is to other pets; prevent with annual testing, preventive medication, and mosquito control.
1 Can It Infect People
Yes, dog heartworm can infect humans, but the probability is low. Transmission is through blood, mostly mosquito bites: a mosquito that fed on an infected dog can later bite a person and pass larvae. Because the larvae cannot survive and develop in humans, the incidence is low; only in endemic areas with heavy infection is exposure likely. Human infection often shows no clear symptoms, but over time may rarely cause lung or subcutaneous nodules with fever, pain, and chills.
If you worry about infection, see a nearby hospital. Also note heartworm spreads readily to other dogs or cats via mosquitoes, so multi-pet homes must prevent and treat promptly.
2 Symptoms, Treatment, and Prevention
In dogs, signs include cough and breathing difficulty, low activity and lethargy, weight loss, abdominal swelling, and heart issues such as murmurs. Test promptly if these appear; treatment is medical or surgical per the vet.
Prevent with annual heartworm testing, regular preventive drugs containing selamectin, moxidectin, or milbemycin oxime, and mosquito control through clean surroundings, screens, and repellents. A veterinary professional can answer further questions and provide guidance.
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