Listeriosis: an opportunistic infection.

Listeria monocytogenes, is a Gram positive, aerobic, intracellular pathogen with a predilection to cause illness in patients with diminished cell mediated immunity(l,2). Reports of listeriosis from India are scanty either because of its rarity, failure to recognize the bacterial growth, improper isolation techniques or lack of awareness. We present three cases of listeriosis to document the setting of this" infection and its varied clinical presentations in pediatric patients.