Allergy Prevention: Mold Spores

Mold spores are allergens that can be found both indoors and out doors. There is no definite seasonal pattern to molds that grow indoors. However outdoor molds are seasonal, first appearing in early spring and thriving until the first frost. Indoor molds are found in dark, warm, humid and musty environments such as damp basements, cellars, attics, bathrooms and laundry rooms. They are also found where fresh food is stored, in refrigerator drip trays, garbage pails, air conditioners and humidifiers.

Outdoor molds grow in moist shady areas. They are common in soil, decaying vegetation, compost piles, rotting wood and fallen leaves.

Preventive Strategies

• Use a dehumidifier or air conditioner to maintain relative humidity below 50% and keep temperatures cool.
• Air out closed spaces such as closets and bathrooms.
• Vent bathrooms and clothes dryers to the outside.
• Check faucets, pipes, and ductwork for leaks.
• When first turning on home or car air conditioners, leave the room or drive with the windows open for several minutes to allow mold spores to disperse.
• Remove decaying debris from the yard, roof, and gutters.
• Avoid raking leaves, mowing lawns, or working with peat, mulch, hay, or dead wood. If you must do yard work, wear a mask and avoid working on hot, humid days.