Aspergilllus grows in very humid and damp environments. It can develop via air conditioning and heating systems in the home and cause allergic reactions in most individuals.
Cladosporium has a dark green or black color with a velvet powdery texture. It's commonly found attached to wall paper, dead plants, food, soil and fiber glass ducts. Cladosporium is easily dispersed into the air if tampered with, causing those in contact to potentially develop skin rashes, asthma, sinus problems, coughing and nail fungus.
Penicellium typically grows in carpet, food, fiber glass insulation ducts, soil and decomposing vegetation. Asthmatic symptoms are commonly attributed to this type of mold exposure. It's also able to produce myotoxins which can cause serious liver and kidney damage.
The dark colored mold Alternaria is typically found in bathrooms as a result of a leakage. It thrives in damp and humid environments and can grow in carpets, bathroom showers and windows. Exposure can provoke respiratory and asthmatic issues.
Stachybotrys is rather slimy, has a black color and is the most dangerous type of household mold. Mycotoxins produced by black mold are suspected carcinogens and immunosuppressive. It thrives in areas that are extremely wet and damp, or houses with water leaks. Symptoms of exposure may include coughing, headaches, nose bleeds and cold and flu-like symptoms.