The amount of moisture available on a surface that mold can use to support growth is known as the... - water activity
How do molds replicate? -
... [Show More] Sporulation
What molds produce respirable particles? - Aspergillus, penicillium
Respirable - Can be deeply inhaled into lungs; 5 microns
4 common viruses found in sewage - rotavirus, GI virus, adenovirus, hepatitis
Name 3 primary sewage biohazards - virus, bacteria, parasites
3 secondary sewage biohazards - endotoxins/exotoxins, mycotoxins, mold
4 common gram negative bacteria found in sewage - e. coli, salmonella, shigella, psuedomonas
Pathogenic - disease causing
MC that can support mold growth - 16
MC that can support wood decaying fungi - 20
What federal agency governs indoor air quality? - none
What factors affect mold growth? - temperature, light, water, oxygen, pH, nutrients/food source
What is the nutrient that mold grows best on? - Cellulose
Define ERH - equilibrium relative humidity (moisture at the surface)
Example of hydrophilic mold - stachybotrys chartarum
Example of mesophilic mold - aspergillus & penicillium
Example of xerophilic mold - aspergillus & penicillium
4 ways to be exposed to bioaerosols - ingestion; cut/puncture/injection; dermal; inhalation
How do viruses replicate? - injection of RNA into live host cell
What is the common route of entry for mold exposure? - inhalation
What is the common route of entry for exposure to category 3 water? - ingestion
What does MVOC stand for? - microbial volatile organic compounds
What are MVOCs? - odor (gaseous waste by-products) released by actively growing molds
3 sources for MVOCs - reactivated pet urine, wet building materials, bacteria
The presence of MVOCs can be an indicator of: - unacceptable indoor air quality, active microbial growth, incomplete remediation
What is a micron? - unit of measurement equal to 1/1,000,000 meters
What is the definition of viable? - able to reproduce (germinate)
What is the definition of non-viable? - not capable of germination
What is the definition of settled spores? - spores landed on surface but not actively growing
What is the definition of mycotoxins? - toxigenic compound produced by molds under certain conditions
Why do molds produce mycotoxins? - defense mechanism
What is the carcinogenic mycotoxin produced by aspergillus? - aflotoxin
What are the immunizations that water and mold technicians are recommended to have? - hepatitis a&b, tetanus
What is the time frame for stachybotrys to colonize? - 7-12 days
What is the time frame for aspergillus to colonize? - 48-72 hours
What is the size of most mold spores found in indoor water damaged environments? - 2-20 microns [Show Less]