Photomicrograph of a bronchoalveolar lavage cytospin preparation demonstrating eosinophilic inflammation from a 4-year-old Quarter Horse gelding barrel racer with a history of mild asthma (eosinophilic and mastocytic) and exercise-induced pulmonary hemorrhage. Approximately 30 bright pink-staining eosinophils are visible in this image, in addition to the larger mast cells with eccentric nuclei. Magnification = 10X.