AIDS and class II microbiological safety cabinets.

Evaluation of laminar flow microbiological safety cabinets.

The microbiological control efficiency of two class 100 laminar down-flow hoods was determined by using aerosols of Bacillus subtilis var. niger spores. The first unit challenged utilized a slanted eyelid to partially enclose the front work opening. This hood showed nearly perfect control of ambient organisms in the work area. It also gave a 10(6) or greater drop in the number of organisms pass...

Problems in the disinfection of class 1 microbiology safety cabinets.

Microbiology safety cabinet disinfection procedures using formaldehyde have been tested. Tubercle bacilli were killed by concentrations of formaldehyde obtained by heating commercial formalin irrespective of whether the bacilli were in the cabinet free space or above the prefilters. However, Bacillus stearothermophilus spore papers for for the testing of low temperature steam/formaldehyde steri...

Performance of exhaust-protective (class I) biological 'safety' cabinets.

Nineteen open-fronted (class I) safety cabinets were subjected to spore containment and airflow tests, which suggested that a flow of 0.75 m/s was the minimum required for safe operation; further tests on three of the cabinets were repeated at different air speeds and confirmed this. The airflow is required to overcome the effect of laboratory or external air currents. Contamination of surfaces...

Policy on Choice of Fumigant for Fumigation of Microbiological Safety Cabinets and Containment Level 3 Suites

Safety of portable inoculation cabinets.

Laboratory work with pathogenic microorganisms should be performed in a ventilated safety cabinet. A minimum airflow of 0-5 metres per second through the working aperture has been recommended, with discharge of the exhaust air through a filter, then into the open air (Department of Health and Social Security, 1970). Such a unit must be permanently installed. There are possible advantages to a p...