兔真菌病诊断与防控：从皮肤镜检到环境消毒方案

Rabbit dermatophytosis, also known as ringworm, is mainly caused by Trichophyton mentagrophytes with high contagiousness and zoonotic risk. It thrives in high temperature and humidity, presenting as circular hair loss patches, crusted skin, and itching, severely affecting commercial value of rabbit fur.

Diagnostic methods include: Wood''s lamp examination revealing characteristic green fluorescence in infected hairs with ~60-70% positive rate. Direct microscopy of hairs and scales from lesion margins treated with 10% KOH showing hyphae and spores confirms diagnosis. Fungal culture uses Sabouraud dextrose agar at 28 degrees Celsius for 7-14 days.

Systemic antifungal treatment: itraconazole at 5-10 mg/kg orally once daily for 14-21 days, or terbinafine at 10-20 mg/kg orally. Topical treatment uses 2% ketoconazole cream or 1% clotrimazole ointment applied to lesions twice daily.

Environmental disinfection is the challenge in dermatophytosis control. Fungal spores are highly resistant to common disinfectants; use 1:10 sodium hypochlorite or 3% hydrogen peroxide. Spray disinfect after thorough cleaning twice weekly for 4 consecutive weeks. High-temperature steam sterilize all potentially contaminated equipment.

Prevention: quarantine new rabbits for 30 days with Wood''s lamp and fungal culture. Maintain ventilation and dryness with relative humidity below 65%. Immediately isolate and treat affected rabbits; prophylactically treat in-contact rabbits with itraconazole or griseofulvin in feed.