Ringworm, despite its name, is not caused by a worm but by a fungal infection of the skin, hair, and nails. On canines, it frequently manifests as circular areas of hair loss, often with a red, inflamed border. The lesions can appear scaly, crusty, and may be accompanied by itching, although not always. The appearance can vary considerably; some cases present with subtle symptoms, such as mild scaling or broken hairs, while others display more pronounced and characteristic ring-shaped lesions.
Accurate identification of a fungal infection is crucial for timely intervention and prevention of its spread. Left untreated, the infection can persist and potentially transmit to other animals or humans. Historically, diagnosing such infections relied heavily on visual inspection, but modern diagnostic methods, such as fungal cultures and microscopic examination of hair samples, offer more reliable confirmation.