Scientific Name: Absidia corymbifera

Although Absidia does exist outside the home (in decaying organic matter and soil), it may also be found in indoor environments. Look for it if you have a bird or potted soil present in your home, as it is found in droppings and decaying matter (i.e. compost heaps).

There are a variety of different species of Absidia, most of which can cause mycotic abortion in animals and pose a great threat for people with weakened immune systems.



Scientific Name: Acremonium alternatum

Acremonium mold is found relatively frequently in indoor environments, primarily in cool, wet or damp locations. If your home is suffering from chronically wet conditions, it is possible that Acremonium mold may be present. Particular areas of concern are: windowsills, cooling coils, heating ventilation, water from humidifiers and drain pans.

Although Acremonium mold is considered to be one of the less-dangerous molds, it can be dangerous to immune-compromised patients.



There are a wide variety of different types of Alternaria.

Alternaria are known to be an allergy causing fungus. Consisting of somewhere around 50-60 species, Alterneria are present in a multitude of organic materials when in a wet or damp state. Most commonly, they are found in food, soil, plants and indoor air. Because they possess airborne spores, Alternaira poses a particular threat to those with weakened immune systems and persistent allergies.

Alternaria can, in toxic situations, lead to severe and even fatal asthma.



Aspergillus consists over 100 species.

Aspergillus is a very common household fungus, posing a wide variety of threats to humans. It is prevalent throughout the world, and a very pervasive type of fungus.

Both a human and animal pathogen, Aspergillus is known to cause a group of disesases referred to as “Aspergilloses.” Symptoms range from cough, to chest pain, to fever or breathlessness, which can make for a difficult diagnosis. Aspergilloses is not limited to humans, and has also been found in birds and other animals.



Scientific Name: Aureobasidium pullulans

Aureobasidium is frequently found in indoor environments, on damp walls, in humidifier water, carpets, floors and mattress dust. It is sometimes found in food and cereals that have become damp over a period of time, and can grow at lower temperatures in a variety of locations.

Because it is so commonly found in humidifiers or air conditioners, it is not uncommon for people to develop pneumonitis or “humidifier lung,” after long periods of exposure.



Scientific Name: Botrytis cinerea 

Commonly found on spoiled fruit, extended exposure to Botrytis can cause what is known as “winegrower’s lung.”



Chaetomium is not limited to homes, but also effects libraries and the food industry.

This pervasive spores are particularly unpleasant-looking. Typically found in air, soil and plant debris, these olive brown masses are known to cause infections in humans, particularly those who are immunocompromised.



Chrysonilia is also known as “Red Bread Mold.”

These dry spores are produced by budding, and are typically found in carpet and mattress dust. There are a variety of health risks associated with Chrysonilia, which are particularly problematic when combined with any major barrier breaks.



Cladosoporium is a known trigger for Asthmatic Attacks.

If your home or business has wet building material, it is likely that Cladosporium is present. Although concentrations are low in winter, in summer Cladosporium blossoms, flourishes, and causes a great deal of trouble for asthmatics. Unfortunately, the list of places that Cladosporium may be found ranges from floors, to carpets, to walls and decaying matter.



Curvularia are normally a shiny, velvet-like black.

Culcularia is found commonly in mattress and floor dust, as well as painted wood. Those with weakened immune systems and major barrier breaks (i.e. major surgery/venous catheter presence] are at risk.



There are a wide variety of types of Emericella.

This fungus is found in mattress dust, carpet, and decomposting wood. It is a soil fungus that is widespread, and may cause problems in those with weakened immune systems.



Epicoccum is found worldwide.

Commonly found on soil and promoted by dead plants, this mold may be found in a variety of locations, ranging from carpet, to mattress dust, to exposed acrylic paint. It poses a threat to those with weakened immune systems.



Eurotium is a soil borne fungus, posing a variety of risks for humans. It may be found in HVAC systems, which can be particularly problematic when those with weakened immune systems are exposed to the fungus.




Fusarium is frequently referred to as hyphomycetes.

This spindle like fungi can effect both human and animal health if given the opportunity. Many times it is found in wilting crops, such as bananans, pears, and sweet potatoes. In indoor environments, look for Fusarium in very wet conditions. Fusarium flourishes in the stagnant water of HVAC systems, as well as damp carpet, damp wallpaper and other similar areas.Fusarium poses a risk for those who inhale it as well as encounter it, and can infect eyes and fingernails, causing keratitis.


Geomyces is widespread in nature.

This fungi are actually able to degrade nails and hair, and are primarily noted for superficial infections of nails and skin in humans. It may be found in very damp areas, such as swimming pool floors, as well as damp walls and mattress dust.


This is a very, very prevalent fungus

Found in sewage, plants, dairy produces, water, air and soil, there aren’t many things that can’t be attacked by Geotrichum.

Unfortunately, the risks associated with Geotrichum are associated with a variety of infections ranging from bronchial to pulmonary. If there is a large amount of food spoiled in a home, this species may be present.




Gliocladium is a commonly occurring, tubular fungus.

Found worldwide, Gliocladium is typically found in soil and plant debris. It is aso found in moldy fabricks.

Health effects are relatively unknown, however it has been known to be an allergen to some humans.

Mold Library:


Very little is known about this mold, as it is relatively rarely occurring. It is found in soil.


This is a widely spread fungus that has been isolated primarily to extremely wet gypsum board. It has many toxins similar to Stachybotrys.



Mucor is a very commonly found species of mold.

Found in plants, manure, decaying fruit and soil, this mold is particularly prominent in households that have a great deal of stored and/or processed foods. It is known for causing infections in humans, as well as warm blooded animals, and can infect nasal passages, eyes, lungs, brain and skin, to name a few.

It may also be found in carpets and mattresses, as well as floor dust.


Scientific Name: Myrothecium verrucaria 

This potent cellular decomposer has been formulated into a pesticide, and may be found in cotton, textiles, paper and similar substances.

There is very little know about the medical effects of Myrothecium


This commonly found fungus is found in soil, bark, cork, and wood pulp. It may produce toxic products under the correct conditions, but it is unknown as to whether these toxins are potent enough to effect humans and animals.



There are a wide variety of species of Paecilomyces. 

The Paecilomyces most commonly found in hoseholds are:

  • Paecilomyces lilacinus

  • Paecilomyces fusosoroseus

  • Paecilomyces farinosuss

  • Paecilomyces carneus

They are found throughout a wide range of materials, from insects to soil, butter and gelatin. They are also present in damp walls, wet plaster, dust and HVAC fans.



Penicillium chrysogenum is the most commonly found indoor species.

Some members of the group of Penicillium produce penicillin, a commonly used antibiotic. Penicillium chrysogenum is widespread, and is frequently found on floor, carpets, mattresses and damp building materials. It produces a number of toxins, all of which are at a moderate toxicity to humans.

Penicillium can be particularly dangerous to immunocompromised individuals.


Found in plant debris, soil and animal feces, Phialophoria is known for giving wood a characteristically bluish stain.

Phialophoria is particularly prevalent in wet, wood or wood like-areas, such as wood pulp and sauna boards.

There is very little known about the medical effects of Phialophoria.



Found in soil and damp, wood substances, Phoma may be found in damp wood, window frames, and most notably, bathrooms. There are a variety of species that are found indoors.

Harm caused to humans by Phoma is rare, however any mold in abundance should be treated with the utmost concern by the homeowner.



Scopulariopsis group of a variety of species commonly found in plant and animal products, as well as soil and decaying wood. There have been some near-fatal poisoning events after Scopulariopsis was seen growing on dyes utilized in the production of wallpaper.

Serpula lacrymans


Serpula lacrymans is most commonly known for causing dry rot.

This is a very destructive fungus, and can pose a danger in your home if it isn’t treated. It has a relatively limited distribution and thrives in warmer climates, although it can survive anywhere from 37 to 79 degrees Fahrenheit. It is considered to be one of the largest, most damaging threats to indoor wood in the regions that it inhabits. If you suspect dry rot is present in your home, consult a professional immediately.


If your windows are older and decaying, you may need to keep an eye out for Sisotrema, particularly when considering the areas where doors/windows are joined.

Stachybotrys/Black Mold


This slimy, clustering mold is prevalent throughout the world. 

Although many people know about the existence of black mold, it is often overlooked and may have serious repercussions. Black mold is commonly found in soil, but most frequently appears on water-damaged buildings or other water damaged materials.

There are a wide variety of both human and animal side effects to black mold, the most serious of which is death. The volume of spores inhaled or ingested and the length of exposure contribute greatly to the extent of the side effects of black mold, but the most commonly exhibited symptoms are as follows:

  • Chronic sneezing and coughing

  • Irritation of the eyes, mucous membranes, throat, nose and mouth

  • Irritation of the mouth, throat and nose

  • Bleeding in the lungs and nose

  • Shock

  • Dermal necrosis

  • Hemorrhage

  • Nervous disorder

  • Nausea

  • Vomiting

Should you see black mold in your home or begin to exhibit any of these symptoms, seek immediate consultation from a professional. At FREE MOLD CHECK, we provide you with a FREE MOLD INSPECTION in order to determine whether or not black mold is in your home.

There are other types of mold, however, that are not toxic and not harmful to humans, so it is important that you receive an inspection in order to ascertain the type of mold.




Trichoderma is present in nearly all soils, and is a very common fungi.

Trichoderma thrives in locations with high water activity, much more so than most other molds. It has been known to promote infection in the immunocompromised, most commonly children.



Ulocladium is commonly known for causing Type 1 (hay fever) allergy.

Requiring water to flourish, Ulocladium is a troublesome fungi that is dark in color and commonly found in bathrooms, basements and kitchens. It is similar to Alterneria and may cause skin surface as well as deep skin infections in patients with weaken immune systems.


Wallemia are common in foodstuffs and textiles in indoor environments.

This type of mold is widespread. Because of the miniscule size, Wallemia easily invade the respiratory system and have been referred to as highly allergenic. They have been said to produce “Farmer’s Lung Disease” in humans.