PATHOGENS NEED IRON. “Haemophilus influenzae is an obligate human commensal/pathogen. This haem autotroph must acquire haem from its host to sustain aerobic growth.” This is common for many pathogens, bacterial, fungal or viral. This obligate need for iron has led to a range of iron acquisition strategies by the invasive pathogens, and creative iron sequestering responses by their hosts.
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