Is dog heartworm found only in dogs that frequently go outdoors?

Dog heartworm is caused by a parasitic worm that is transmitted primarily through the bite of infected mosquitoes. While outdoor environments are where mosquitoes thrive, heartworm disease can affect dogs that may not have frequent outdoor exposure. This is because mosquitoes can enter homes and yards, transmitting the larvae to dogs even if they are primarily kept indoors. The disease is not limited to outdoor activity and can arise from any exposure to infected mosquitoes. Therefore, the assertion that dog heartworm is found only in dogs that frequently go outdoors is not accurate, making the correct response that this statement is false. Understanding the transmission dynamics of heartworm is crucial for prevention and treatment.