Biosafety levels | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-03-27

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Biosafety_level


00:01:14 1 History
00:03:42 2 Levels
00:03:50 2.1 Biosafety level 1
00:05:34 2.2 Biosafety level 2
00:06:54 2.3 Biosafety level 3
00:09:34 2.4 Biosafety level 4
00:12:46 2.4.1 BSL-4 facilities for extraterrestrial samples
00:14:58 3 List of BSL-4 facilities
00:15:44 4 Safety concerns
00:16:52 5 See also



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SUMMARY
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A biosafety level is a set of biocontainment precautions required to isolate dangerous biological agents in an enclosed laboratory facility. The levels of containment range from the lowest biosafety level 1 (BSL-1) to the highest at level 4 (BSL-4). In the United States, the Centers for Disease Control and Prevention (CDC) have specified these levels. In the European Union, the same biosafety levels are defined in a directive. In Canada the four levels are known as Containment Levels. Facilities with these designations are also sometimes given as P1 through P4 (for Pathogen or Protection level), as in the term "P3 laboratory".
At the lowest level of biosafety, precautions may consist of regular hand-washing and minimal protective equipment. At higher biosafety levels, precautions may include airflow systems, multiple containment rooms, sealed containers, positive pressure personnel suits, established protocols for all procedures, extensive personnel training, and high levels of security to control access to the facility.