A taxonomic group or family of bacteria that require blood factors for growth and survival.
From Greek 'haima' (blood) + '-phile' (lover of) + '-ae' (Latin plural ending). This is the scientific classification for blood-requiring bacteria.
Hemophileae is a classification you'd see in microbiology—it includes Haemophilus species that cause ear infections, pneumonia, and meningitis, and they're called 'fastidious' because they're picky about needing blood in their growth medium.
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