Biosafety level 4 (BSL-4) is the highest level of biosafety precautions, and is appropriate for work with agents that could easily be aerosol-transmitted within the laboratory and cause severe to fatal disease in humans for which there are no available vaccines or treatments.

Biosafety level 4 (BSL-4) organisms are dangerous or exotic agents which pose high risk of life-threatening disease, aerosol-transmitted lab infections, or related agents with unknown risk of transmission.

BSL-4. BSL-4 builds upon the containment requirements of BSL-3 and is the highest level of biological safety. There are a small number of BSL-4 labs in the United States and around the world. The microbes in a BSL-4 lab are dangerous and exotic, posing a high risk of aerosol-transmitted infections.

2022年6月16日 · Biosafety Level 4 (BSL-4) Biosafety level 4 is the highest level that is employed while working with dangerous infectious agents that present a high individual as well as environmental risk in the form of life-threatening disease, …

2022年11月3日 · Biosafety level 4 (BSL-4) labs are rare; however, a small number exist in the U.S. and around the world. As the highest level of biological safety, BSL-4 labs work with highly dangerous and exotic microbes, such as the Ebola and Marburg viruses.

In the United States, the designations BSL-1, BSL-2, BSL-3, and BSL-4 describe the minimum safe work practices, specially designed buildings, and safety equipment required to conduct work on infectious microorganisms and other biological hazards. BSL-4 is the highest biosafety level.

2023年10月16日 · Biosafety Level 4 (BSL-4) is the highest level of containment for laboratories working with infectious agents. BSL-4 laboratories are designed to handle the most dangerous and exotic pathogens, including viruses, which pose a …

2025年2月13日 · BSL-4: Reserved for the most dangerous and exotic pathogens, BSL-4 represents the pinnacle of biosafety containment. Microbes studied here typically have no available treatments or vaccines and pose a high risk of life-threatening illness. Researchers work in full-body, positive-pressure suits and operate within complex, isolated facilities ...

The descriptions of biosafety levels (BSL) 1 – 4 parallel those in the NIH Guidelines for research involving recombinant DNA. The BSL categories are divided up by risk of disease combined with availability of preventive and therapeutic treatments. The table below contains a list of agents and their categories.

The four biosafety levels are BSL-1, BSL-2, BSL-3, and BSL-4, with BSL-4 being the highest (maximum) level of containment. There are additional specific rules and designations for animal research (ABSL), agricultural research (BSL-Ag), and other types of research.