ADVERTISEMENT The American Association of Equine Practitioners (AAEP) has published on its website comprehensive guidelines to assist practitioners and regulatory agencies with identification, diagnosis, and control of epizootic lymphangitis, epizootic lymphangitis a contagious chronic granulomatous disease of the skin, lymphatic vessels, and nodes of the limbs, neck, and chest of horses and other equid species. Although epizootic lymphangitis is not known to occur in horses in the United States, the fungal disease is common in parts of Africa, the Middle East, Russia, and Asia, where it is responsible for significant morbidity with chronic weight loss and progressive debility in affected animals.