Pathogens (which can be bacteria, viruses, fungi or other parasites) are classified into four levels of biosecurity based on the following factors:
- The pathogenicity of the microorganism
- The way it is transmitted
- The availability of effective preventive measures
- Availability of effective treatment
The maximum biosecurity level is 4 (BIOSAFETY LEVEL 4, BSL 4) including pathogens that cause serious diseases in humans or animals: Ebola,Marburg Lassa , Congo-Crimée , infection-with-virus-Nipah.
