Microbes in Air and Bioaerosols. ENVR 133 Mark D. Sobsey. Bioaerosols. Microorganisms or particles, gases, vapors, or fragments of biological origin (i.e., alive or released from a living organism) that are in the air. Bioaerosols are everywhere in the environment.
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Mark D. Sobsey
Living Source Examples
Green plants Ambrosia (ragweed) pollen
Arthropods Dermatophagoides (dust mites) feces
Mammals horse or cat dander
Pulmonary (Alveolar) Region:
When inhaled, aerosol particles derived from aqueous fluids pick up moisture (water) while traveling in the respiratory passageways, thereby increasing in size.
Viruses: influenza, measles (rubeola), chickenpox (herpes varicella‑zoster) and rhinoviruses (colds); Hantavirus (from a rodent; mouse)
Bacteria: Legionella spp., tuberculosis and other mycobacteria (Mycobacterium spp.), anthrax (Bacillus anthracis), and brucellosis (Brucella spp.).
Fungi: diseases: histoplasmosis, cryptococcosis, blastomycosis, coccidiodomycosis, and aspergillosis
Protozoans: Pneumocystis carinii pneumonia; prevalent in immunodeficient hosts such as AIDS patients.
Acanthamoeba encephalitis; primary amebic meningoencephalitis (PAM)
Wide range, overall
Depends on the microbe
Reservoirs and amplifiers:
Cleveland Auto plant outbreak, March, 2001:
Pontiac fever: also caused by Legionella.
Sedimentation - Agar Medium Plate
Open Face Air Filter Cassette with Cap