In other cases, surgery might be necessary. However, cutaneous bacterial isolates have been implicated in various equine skin conditions. Lymphangitis is another cutaneous syndrome in which bacteria are one of several possible etiologies. When the condition is caused by bacteria, it is termed ulcerative lymphangitis. Both the skin and cutaneous lymphatics of the leg are affected.
Lesions begin as papules or nodules that rupture and result in crusts, ulcers, and draining tracts.
Regional lymphatics may be swollen, producing a corded appearance. In some cases, the entire leg may be enlarged. Diagnosis is based on impression smears and bacterial culture. Fungal culture, skin biopsies, and contrast radiography may be needed to rule out other possible causes. Keeping stalls free of manure and urine and making use of clean bedding will help prevent spread of the disease if it is infectious in nature.