Common molds

black and red mold on tile grout

Alternaria
One of the four most common allergenic molds, grows on plants and plant material, easily made air-borne, released by the wind during dry periods

Aspergillus
One of the four most common allergenic molds, common soil fungus, released by the wind during dry periods, will grow on almost any substrate, frequently found on damp hay, grain, sausage, and fruits, commonly cultured from houses, especially basements, crawl spaces, and bedding

Botrytis
Damaged or dead plants, dead leaves, and occasionally prunings and fallen fruit, also can attack flowering plants, especially petals, and fruits such as citrus, kiwi, and grapes

Candida
Normally found on the skin and on mucosal surfaces of humans, including mouth, vagina, and intestinal tract

Cephalosporium
Common soil inhabitant, also isolated from dust in textile plants

Cephalothecium
One of many names for a group of fungi that causes fruit to rot, especially apples.

Chaetomium
Normally found in soil, also grows well on damp paper, fabric, and straw

Curvularia
Soil-borne organism, also grows on plants and plant material, spores are easily dispersed by mowing the grass, released by the wind during dry periods .

Epicoccum
Normally a soil organism, released by the wind during dry periods, often found on decaying plant and vegetable material, plant leaves, uncooked fruit

Fusarium
Common field fungus, parasite on green plants such as peas, beans, cotton, tomatoes, com, sweet potatoes, melons and rice, also saprophytic on decaying plants, loosened during wet periods and dispersed by raindrops

Gliocladium
Normal soil inhabitant, also grows on decomposing plant debris, damp canvas, and occasionally on finished wood products such as paper or cardboard

Helminthosporium
Common field fungus, parasite on cereal grain plants such as com, wheat, oats, and rye, released by the wind during dry periods

Hormodendrum
One of the four most common allergenic molds, found on decomposing plants, leather, rubber, cloth, paper and wood products, released outdoors in great numbers after rains and damp weather

Monilia
Soil borne, also frequently grows on bread and pastries Normal soil, soil around barns and barnyards

Mucor
Normal soil, soil around barns and barnyards

Mycogone species
Found in soil, casing, and straw

Nigrospora
Living grasses but also present on dead ones; easily isolated from dead lawn grass in the autumn, released by the wind during dry periods, also causes disease of certain fruits and vegetables

Paecilomyces
Common soil inhabitant, also grows on damp paper and decaying vegetable material

Penicillium
One of the four most common allergenic molds, soil inhabitant, grows readily on fruits, breads, cheese and other foods, commonly cultured from houses, especially basements, crawl spaces, and bedding

Phoma
Paper products such as books and magazines, also certain paints and green plants, outdoors loosened during wet periods and dispersed by raindrops

Pullularia
Normally in soil, also decaying vegetation, plants and chalking compounds, outdoors loosened during wet periods and dispersed by raindrops

Rhizopus
Grows readily on bread, cured meats and root vegetables indoors, on a variety of plants outdoors

Rhodotorula
A yeast, splash-dispersed, prominent at night and in wet weather, high during fall rains, especially where fruit and berry crops are grown, also often indoors

Saccharomyces
Brewer’s yeast, widespread in nature, occurring in soil and on plants

Spondylocladium
Decaying wood, potatoes and other plant material, released by the wind during dry periods

Stemphylium
Damp paper, canvas and cotton fabric, decaying plant material

Trichoderma
Decaying wood, pine stumps, damp cotton and wool, damp basements, outdoors loosened during wet periods and dispersed by raindrops

Trichophyton
Found as a fungal infection of the skin, primarily on the foot