Bacteria: Single-celled microorganisms that can exist either as independent (free-living) organisms or as parasites (dependent on another organism for life). The plural of bacterium. Examples of bacteria include Acidophilus, a normal inhabitant of yogurt; Gonococcus which causes gonorrhea; Clostridium welchii, the most common cause of gangrene; E. coli, which lives in the colon and can cause disease elsewhere; and Streptococcus, the bacterium that causes the common throat infection called strep throat.

Bioburden: Degree of microbial contamination or microbial load; the number of microorganisms contaminating an object.

Fluence: the sum of the energies of the particles of a fluence (in the case of light, the particles are photons): the energy per unit area contained in the particles with which a material is irradiated. Think of fluence like the water pressure from your garden hose. The proper amount will water your flowers without damage. The same is true with properly filtered 222nm Far UV-C radiation and human beings.

Germs: A pathogenic microorganism. A microbe capable of causing disease.

Microbe: A minute organism typically visible under a microscope. Microbes include bacteria, fungi, and protozoan parasites.

Minimal Infectious Dose: the smallest quantity of infectious material that regularly produces infection in susceptible people.

Pathogen: An agent of disease. For example, Bacillus anthracis is the pathogen that causes Anthrax.

Pathogenic: Capable of causing disease. For example, pathogenic E. coli are Eschericia coli bacteria that can make a person ill.

Pathogenic Bioburden Reduction: Term describes the result of applying a method intending to significantly reduce the number of potentially disease causing microorganisms such as viruses, bacteria, fungus or mold in a given area e.g. surrounding air or surfaces. Other than in controlled environments it is not practical to assume 100% eradication. In the case of Ultraviolet Germicidal Irradiation the UV light must be able to fall directly upon the microorganisms with sufficient fluence, (physics term for the measure of light power), to cause ionization of the pathogens destroying their ability to cause infection.

Ultraviolet Germicidal Irradiation aka UVGI: A decontamination method that relies on shorter wavelength UV radiation (185nm to 254nm), to disrupt the DNA of pathogens, neutralizing their intended effect. Since the UVGI process typically uses lamps that generate radiation near or close to 254nm. UVGI has been safely and effectively used for decades in air, water and food processing. However, it is mandatory to protect humans from exposure. Our Disinfector222 line employs the Columbia University Radiological Lab discovery that 222nm Far-UVC is safe to use in human occupied areas.

Virus: any of a large group of submicroscopic infectious agents that are usually regarded as nonliving extremely complex molecules, that typically contain a protein coat surrounding an RNA or DNA core of genetic material but no semipermeable membrane, that are capable of growth and multiplication only in living cells, and that cause various important diseases in humans, animals, and plants. Coronavirus a single strand (ssRNA) virus is one example.