Avian gastric yeast, Macrorhabdus ornithogaster and Mycobacterium genavense infections in a zoo budgerigar (Melopsittacus undulatus) flock

Over a four-month period, a Michigan zoo had thirty-two budgerigars, Melopsittacus undulatus, from their flock die. Whole animals or formalin-fixed tissues were submitted to Michigan State Universi...