Hospital acquired infections (nosocomial infections) are the most common complications encountered in the neonatal intensive care units (NICU). They generally manifest 48 hours after hospitalization or in 48 hours after discharge. Especially preterm and low birth weight newborns are more vulnerable (20-33%) to nosocomial infections.[8-9] Mechanically ventilated babies face a particular risk because artificial airways bypass the body's defenses against inhaled pathogens and offer new routes for non airborne pathogens [5]. Intubation associated lesions of pharynx and trachea lead to bacterial colonisation by the deterioration of the swallowing reflex and the ciliary functions. Subsequently, these babies may develop pneumonia and sepsis[10] .