Three Blue Penguins (Eudyptula minor) were rescued between July 2006 and January 2007 off the east coast of Auckland, New Zealand. They were taken to a rehabilitation center, where they subsequently died in May 2007 and were submitted for necropsy. There was unilateral enlargement of the salt glands with disseminated small, pale, and firm foci in all birds. Histologic examination of the affected glands demonstrated the presence of multifocal granulomas and areas of severe squamous metaplasia of the collecting ducts. The remaining gland had areas of hyperplasia, dysplasia, and necrosis with a severe granulomatous inflammatory reaction. Intralesional gram-negative bacteria were detected, but, unfortunately, bacterial culture was unrewarding. No further cases were observed in penguins in the subsequent year, and the primary cause of the salt gland adenitis remains uncertain.
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Vol. 46 • No. 1