Describes a case of primary and secondary infections of TB in an office environment in Tokyo, Japan. It was found that the ventilation system was frequently closed down to save energy, resulting in high CO2 concentrations. Concludes that the secondary infections were due to insufficient ventilation.
Nosocomial infectior1s are a major problem in many hospital buildings, with ,approximately 10% of patients acquiring such an infection during a hospital stay. Airborne transmission is one of the important routes for a number of nosocomial pathogens. To combat this proq,lem there are a number of engineering control strategies, such as the use of ultraviolet germicidal irradiation and advanced ventilation techniques, which can be used. This paper outlines the 'state of the art' in air disinfection, and reviews recent research work in this field.
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