Abstract
Aspergillus fumigatus was isolated purely from the milk of a 6-year-old Holstein cow which had begun to show symptoms of mastitis a day after delivery. Only the left front udder exhibited general swelling, induration, and pain.
When 1-ml milk samples were collected from this udder at 17, 19, and 27 days of illness, 200, 250, and 230 pieces of A. fumigatus, respectively, were isolated, About 20 pieces were present 1cm3 of mammary tissue stamp prepared after slanghter.
Histopathologically, many large and small lesions contained hyphae which were clearly radiating in the acinus. Granulomata were formed in old lesions. Consequently, this mastitis was concluded to have caused by A. fumigatus.
