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Phylogenetic analysis identifies the 'megabacterium' of birds as a novel anamorphic ascomycetous yeast, Macrorhabdus ornithogaster gen. nov., sp. nov.

International journal of systematic and evolutionary microbiology - 1 Jul 2003

Tomaszewski Elizabeth K, Logan Kathleen S, Snowden Karen F, Kurtzman Cletus P, Phalen David N

Abstract excerpt

An organism commonly referred to as 'megabacterium' colonizes the gastric isthmus of many species of birds. It is weakly gram-positive and periodic acid-Schiff-positive and stains with silver stains. Previous studies have shown that it has a nucleus and a cell wall similar to those seen in fungi. Calcofluor white M2R staining suggests that the cell wall contains chitin, a eukaryote-specific substance, and rRNA in...

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PMID: 12892150
DOI: 10.1099/ijs.0.02514-0

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-07.1.

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