Nosocomial pneumonia.

Nosocomial pneumonia remains an important infection that warrants continuing investigation. The past year has seen a number of reports further describing risk factors, controversial issues around diagnosis, and potential preventive strategies. For specific infecting organisms such as Legionnaire's disease and tuberculosis, further reports of issues related to water supply in the former and staff preventive programs in the latter have also been reported. Substantive advances in prevention or management have not, however, been identified.