The past decade has witnessed a veritable explosion of interest in the
simple molecule nitric oxide (NO) as a vasodilator, neurotransmitter,
and antimicrobial agent. NO and other reactive nitrogen intermediates
exhibit cytostatic or cytocidal activity against a remarkable breadth
of pathogenic microorganisms. Mammalian cells, including human cells,
produce nitric oxide both constitutively and inducibly in response to
inflammatory stimuli. This review will provide a brief overview of cu
rrent knowledge regarding the antimicrobial activity of NO and the pos
sible importance of this activity in infection, particularly with rega
rd to intracellular pathogens.