pollenplant material generally from the outdoors sporesmold and other fungi, both indoors &...
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Pollen Plant material generally from the outdoors
Spores Mold and other fungi, both indoors & outdoors
Dust Animal dander, excrementInsect parts, excrementSkin Cells
Bacteria Humans, Water, Soil
Viruses Humans
Biological
Pollutants
(Bioaerosols) Sources
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #1
Mold Problems are Caused by Excess Moisture
Solve the moisture problem–solve the mold problem
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #2
Where Biological Pollutants May be found in the Home1. Dirty air conditioners
2. Dirty humidifiers and/or windows3. Bathroom without vents or
windows4. Kitchen without vents or windows5. Dirty refrigerator drip pans6. Laundry room with unvented
dryer7. Unventilated attic8. Carpet on damp basement floor9. Bedding10. Closet on outside wall11. Dirty heating/air conditioning
system12. Dogs or cats13. Water damage (around windows,
roof,or basement)
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #3
Solving Moisture Problems
• Block moisture entry• Control or remove source• Dehumidifiers and A/C equipment – possible
options
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #4
SporesPollensAnimal DanderDust Mites
These are allergens that may affect only sensitive persons. These persons experience symptoms such as sneezing, nasal obstruction, and discharge, redness, watering, and itching, headache, eye and throat irritation, nausea, dizziness, and fatigue
Viruses Influenza, measles, etc.
Bacteria Tuberculosis, Legionnaires’ disease, etc.
s
Biological Pollutants
Health Effects
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #5
Mold Grows on organic materials and needs high humidity.Spores are generated that become airborne and move through the house to land and form new colonies.
Dust Mites Dust mites thrive on a food source of dead human skin cells, at humidity levels above 45% and at temperatures above 65 degrees. Heaviest populations are generally in bedding, carpeting, upholstered furniture, and other textiles. Vacuuming, bed making, and other cleaning may cause the dust to become airborne.
Biological Pollutant
How Transported
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #6
Pollen Generated by outdoor plants and enters the house through cracks, open doors and windows, and on shoes and clothing. Because they are small, they can become airborne.
AnimalDander
Animal dander and saliva from pets, rodents, and other animals can become airborne.
Biological Pollutant
How Transported
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #7
Viruses Persons with viruses can transmit the viruses through coughing and wheezing.
Bacteria Can be transmitted from persons with the disease and from contaminated water.
Biological Pollutant
How Transported
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #8
Mold Musty Smell, evidence of high humidity, standing water
Animal Dander
Pets in the home
Dust MitesPollenVirusesBacteria
Cannot be seen or smelled
Biological Pollutant
How to Detect the Contaminant
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #9
Controlling Mold• Clean, disinfect, and dry surfaces• Lower humidity levels• Clean and disinfect humidifiers, dehumidifiers, refrigerator pans and air conditioning coils• Exhaust the dryer to the outdoors• Run a bathroom exhaust fan during bathing or showering• Use a rangehood to exhaust cooking moisture• Fix plumbing leaks and seepage• Raise the temperature of cold surfaces with insulation or storm windows• Increase air circulation by opening closet doors and moving furniture away from walls• Dispose of wet carpeting and other damp fabric furnishings
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #10
Other Mold Control Measures• Lower humidity levels with dehumidifiers and air
conditioning• Control moisture in crawlspace• Correct drainage problems around foundation• Waterproof basement walls and insulate• Replace carpet with hard-surface floors in
basement
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #11
Dust Mites• Replace fabric furnishings with hard surface
coverings• Lower humidity levels• Vacuum fabric furnishings with HEPA vacuum or
central vacuum system• Wash bedding in hot water (130 degrees F)• Use plastic coverings on mattresses and pillows• Damp clean hard surfaces
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #12
General Control Measures• Maintain and clean all appliances that come in contact
with water• Change filters on heating and air conditioning units
according to manufacturer’s directions.• Empty and regularly clean refrigerator drip pans,
humidifiers, dehumidifiers, and furnace attached humidifiers
• Use air conditioning during the summer to reduce pollen infiltration into the home and lower humidity levels
• Air cleaning devices may achieve an additional reduction in the levels of biological pollutants when other control methods do not result in acceptable pollutant concentrations.
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #13
SUMMARY• Remove the source of contamination• Replace soft textiles with hard surfaces• Use vacuums with high-efficiency filters or
central vacuuming systems• Ventilate to lower humidity levels• Use air cleaners only if necessary
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Slide #14
Optional slide #1
What is Stachybotrys?A black, slimy mold that needs abundant moisture. Can grow on paper, wood, and products made from these:
Cardboard
Wallboard
Ceiling tiles
Drywall
Wallpaper
Newspaper
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module
Identification
• Black, slimy mold – grows on wet paper or wood-based products
• Laboratory analysis – only way to tell for sure• (Other, less harmful black molds are more
common in homes)
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Optional Slide #2
Health Effects
• Infants: lung hemorrhaging, coughing up of blood, possible anemia or death
• Adults: severe breathing problems, other symptoms, possible death
• Toxic spores are to blame
Healthy Indoor Air for America’s Homes Bugs, Mold and Rot (Biologicals) Instructional Module Optional Slide #3