Hookworms are intestinal parasites of the cat and dog that get their name from the hook-like mouthparts they use to anchor themselves to the lining of the intestinal wall. A large number of hookworms can cause inflammation in the dog's intestine as well as a life-threatening decrease in the number of red bloods cells, which is called anemia.
Once the hookworm larvae get into a dog, they may develop into adult worms while living in the intestines. They may also migrate through the tissues to the dog's lungs where they are coughed up and swallowed, and then finally develop into adults in the intestines.
Ancylostoma caninum, the common dog hookworm, occasionally develops into an adult to cause eosinophilic enteritis in people, but their invasive larvae can cause an itchy rash called cutaneous larva migrans. Moxidectin is available in the United States as (imidacloprid + Causes: Ancylostoma duodenale (old world .
However, these dogs often pass the worms on to puppies, who are more seriously affected. Evidence of hookworm infection in young dogs can include anemia, tarry stools, weakness, and weight loss. See the veterinarian immediately if your puppy presents with these signs, or you suspect your adult dog has acquired hookworms.