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Ringworm (dermatophytosis)
Ringworm is a skin, hair, or claw infection caused by fungi called dermatophytes. It affects many pets such as cats, dogs, rabbits, and guinea pigs, and can also spread to humans. It is usually not serious but is highly contagious.
What is it?
Ringworm is a skin, hair, or claw infection caused by fungi called dermatophytes. It affects many pets such as cats, dogs, rabbits, and guinea pigs, and can also spread to humans. It is usually not serious but is highly contagious.
The disease is caused by dermatophyte fungi, mainly Microsporum canis in cats and dogs. These fungi feed on keratin found in skin, hair, and claws.
Young animals, elderly or immunocompromised individuals, and those living in groups (breeding facilities, shelters) are more at risk. Long fur, poor hygiene, or a humid environment also favor infection.
Commonly observed signs
These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.
Signs include circular patches of hair loss, often with scaling or crusting, and sometimes mild redness. Itching varies and may be absent. In some animals, only a few broken hairs are visible without an obvious lesion.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Transmission
Transmission occurs through direct contact with an infected animal or contact with contaminated objects such as litter, brushes, or bedding. Fungal spores can survive in the environment for a long time, promoting spread.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
If suspicious skin lesions appear, it is important to consult a veterinarian for proper assessment and care. Do not attempt any treatment without professional advice, especially given the risk of transmission to humans.
Prevention
It is advisable to isolate any suspected animal, regularly clean its environment, and wash shared equipment. Washing hands after contact with an affected animal also helps limit spread to humans.
References
ESCCAP — European Scientific Counsel Companion Animal Parasites
Content reviewed by the TunisieVet editorial team · Updated 08 August 2026
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This information is provided for educational purposes only and is not a substitute for a veterinary consultation. If you have any concerns about your animal's health, consult a veterinarian.
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