CHAPTER 64 Granulomatous Lung Disease
Granulomatous lung disease in horses encompasses multiple causative disorders, including bacterial and fungal infection, environmental disease, disease caused by immune complexes generated in association with adverse events such as vaccine or drug reactions (including responses to immune stimulants), and neoplasia. Recently a condition known as equine multinodular pulmonary fibrosis was described that can initially appear as a granulomatous disease (see Chapter 65, Equine Multinodular Pulmonary Fibrosis).