“…is also common in humans and does not always indicate invasion; however, in certain subgroups such as immunocompromised patients the isolation suggestive of invasion 11,20 ofAspergillus spp. is highly Although the pathogenesis of invasive pulmonary or systemic aspergillosis is not known, certain factors such as use of immunosuppressive drugs, chronic antibiotic therapy, and systemic diseases do predispose humans 5,17 and horses 3,12,13,19 to pulmonary infections. There is also a recent report of Aspergillus-induced granuloma formation in the mediastinum of a nonimmunocompromised horse.…”