Dogs get ringworm primarily through direct contact with an infected animal (such as another dog or cat) or a human who has the fungus
. The infection can also be contracted from contaminated objects like brushes, bedding, dog beds, toys, furniture, or surfaces that are difficult to clean, such as carpets and wood
. Additionally, some ringworm fungi live in soil, so dogs can become infected by digging or coming into contact with contaminated soil, especially if they have small skin wounds or scratches that allow the fungal spores to enter
. The spores are hardy and can survive in the environment for up to 18 months, making indirect transmission possible through environmental exposure
. Dogs with weakened immune systems-such as puppies, elderly dogs, or those with other health issues-are more susceptible to ringworm
. Skin damage from wounds, scratches, fleas, or other skin conditions also increases the risk of infection because the fungus needs broken skin to establish itself
. In summary, ringworm in dogs is contracted mainly by:
- Direct contact with an infected animal or person
- Contact with contaminated objects or surfaces
- Exposure to fungal spores in soil, especially through skin wounds
The fungal spores invade the outer skin layer, and symptoms usually appear 1 to 3 weeks after exposure
