Krasan, Graham P. University of Michigan Medical School, Ann Arbor, Michigan.
St. Geme, Joseph W. Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri.
- Human infections
- Veterinary diseases
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A genus of gram-negative, pleomorphic bacteria that are facultative anaerobes and are nonmotile and non-spore-forming. They have fastidious growth requirements, including either factor X (provided by hemin or other porphyrins) or factor V [provided by nicotinamide adenine dinucleotide (NAD), nicotinamide adenine dinucleotide phosphate (NADP), or nicotinamide nucleoside], or both, depending on the species. Erythrocytes represent an exogenous source of these factors.
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