What is the causative agent of dermatophytosis, commonly known as ringworm, in rabbits?

The causative agent of dermatophytosis, better known as ringworm, in rabbits is specifically Trichophyton mentagrophytes. This is a type of fungi that thrives in environments such as fur and skin, leading to the characteristic ring-like lesions seen with this condition.

Trichophyton mentagrophytes infects the hair follicles and the outer layers of skin, causing localized areas of hair loss, scaling, and sometimes inflammation. Understanding this specific fungal organism is essential for accurately diagnosing and treating ringworm in rabbits, and recognizing its role in this condition helps in effective management and prevention strategies.

The other options mentioned, while associated with skin conditions in various animals, are not the causative agents of ringworm in rabbits. Aspergillus fumigatus is a mold that typically causes a different type of infection, Microsporum canis is more commonly associated with dermatophytosis in cats and dogs, and Demodex canis refers to mites associated with demodectic mange rather than fungal infections.