Our main studies are described in the followings.
�T．Comparative study on respiratory infections between Thailand and Japan
　　　Our department has promoted collaboration study on respiratory infections with Chaing Mai University in Thailand. Since then the pathogens of 　　　　　　respiratory infections has been recognized. As a result the antimicrobial treatment has been appropriately modified.

�U．The laboratory and clinical studies on bacterial respiratory infections

�V．Studies on anti‐inflammatory mediator therapy in chronic respiratory infections
　　Our studies have revealed that the neutrophil activator, IL‐８ and neutrophil elastase, play a very important role in chronic respiratory infections. The 　　　studies for anti‐mediator therapies are undergoing.

�W．Basic and clinical studies on nosocomial infections by Staphylococcus aureus
　　Staphylococcal infection is one of the serious problems of nosocomial infections. We established a method for the management of nosocomial 　　　　　　　infections. Although we could reduce the occurrence of MRSA infections, there are various problems concerning this organisms particularly its 　　　　　　pathogenecity.

�X．Analysis of the normal nasal and oropharyngeal flora in children and pediatric patients with upper respiratory infections


�Y．Rapid diagnonsis by molecular biological technique （PCR）
　　Using PCR（Polymerase Chain Reaction）technique, it is possible to detect the pathogens rapidly even if a few number of pathogens are present in 　　　　clinical specimens. We are using the PCR for the diagnosis of mycobacterial infections and obtaining satisfactory results.

�Z．Collaboration study in Uganda on the treatment of AIDS patients with infections（tuberculosis, cryptococcal meningitis and e.t.c）
　　Since １９９０ we have investigated the condition of AIDS in Uganda to save patients complicated with infections. Caollaboration project has been with 　　the School of Medicine, Makerere University, Uganda.

�Z．Basic and clinical studies on influenza

�[．Chinical study on acute respiratory infections and bacterial meningitis among the children in Bangladesh

�\．Study on Bacterial adherence of respiratory infection.