[Clinical manifestations of Stenotrophomas (Xanthomonas) maltophilia infection].

Objective: Stenotrophomonas maltophilia (SM) is a gram-negative bacillus whose incidence like nosocomial pathogen has been incremented in the last years, especially in immunocompromised patients, subjected to invasive procedures and those receiving broad-spectrum antimicrobial therapy.

Method: We report 15 isolations of SM between 1994-1996.

Results: The criteria for SM infection were fulfilled by 9 patients (60%), and 6 patients (40%) were colonized.

[Pleural empyema caused by Corynebacterium sp].

Until recently Corynebacterium sp. had been considered an infrequent cause of infection in humans. In the last few years, however, it has proven its ability to produce severe pulmonary and extrapulmonary infections, generally in immunodeficient hosts.