A mold/mould is actually a fungus. Contrary to popular opinion, the term ‘mold’ is actually used to refer to a large number of fungal species. However, because they are considered to be microbes, molds do not form a specific taxonomic or phylogenetic group.
Mold is a multicellular fungus which is considered to be a microbe. It causes biodegradation of natural materials, leading thus to food spoilage and damage of property. It can also cause allergic reactions and cause certain diseases in humans and animals as well, mainly based on respiratory problems.
Mold is likely to occur when a favorable combination of humidity, temperature, and substrate nutrients are maintained long enough. As many modern buildings use products that increase the likelihood of molds (e.g., paper and wood based products), reported cases have increased in recent years.
A mould is a fungus that grows in the form of multicellular filaments called hyphae. In contrast, fungi that can adopt a single-celled growth habit are called yeasts. Moulds are considered to be microbes. It can cause biodegradation of natural materials, which can be unwanted when it becomes food spoilage or it can damage a property. They can play an important role in biotechnology and food science in the production of various foods, beverages, antibiotics, pharmaceuticals and enzymes. However, they can also cause certain diseases in humans and animals as well, if these are sensitive to mould spores, or have inhaled toxic compounds produces by moulds.