Heartworm is a serious condition caused by worms that live in the heart and blood vessels of infected animals (mainly dogs). The parasite is transmitted by infected mosquitoes. The worms can grow to a length of 15 – 30 cm and produce thousands of larva that can be picked up by mosquitoes and carried to other dogs. The presence of worms in the dog can cause damage to the heart, lungs and liver. The OntarioVeterinaryCollege’s … Read More »