Aspergillus niger is a filamentous fungus that can cause various infections in humans. Its name is spelled using the International Phonetic Alphabet (IPA) as /æˈspɜːrdʒɪləs ˈnaɪdʒər/. The first syllable "as" is pronounced with a short "a" sound, while the second syllable "per" has a long "e" sound. The third syllable "gil" has a soft "g" sound and the fourth syllable "lus" has a short "u" sound. The second word "niger" has a long "i" sound followed by a soft "g" sound and a short "er" sound.
Aspergillus niger is a filamentous fungus belonging to the genus Aspergillus, characterized by its dark-colored spores. It is commonly referred to as black mold or black fungus. Aspergillus niger is widely distributed in nature and is commonly found in soil, decaying organic matter, and indoor environments.
In terms of its morphology, Aspergillus niger typically forms a dense layer of mycelium, composed of long branching filaments, known as hyphae. These hyphae give rise to conidiophores, which are specialized structures responsible for the production of spores called conidia. These conidia are small, black-colored structures that give the fungus its characteristic appearance.
Aspergillus niger is known for its ability to produce a wide variety of enzymes, including amylases, proteases, and pectinases. This makes it a valuable organism for use in industrial processes such as fermentation, food production, and biotechnology, where these enzymes are utilized. Additionally, Aspergillus niger has been extensively studied for its potential applications in bioremediation, as it has the ability to break down a range of organic compounds.
However, despite its beneficial uses, Aspergillus niger is also considered a pathogen, capable of causing infections in humans and animals. It can cause allergic reactions, respiratory problems, and potentially severe diseases, particularly in individuals with weakened immune systems. Proper sanitation and control measures are necessary to prevent its growth and ensure the health and safety of individuals in environments where Aspergillus niger is present.
A pathogenic form, with black spores often present in the external auditory meatus. A. auricularis; see otomycosis.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "Aspergillus" is derived from the Latin word "aspergere", meaning "to sprinkle" or "to scatter". This is in reference to the way the fungus spreads its conidia (spores) in a characteristic branching pattern, resembling a sprinkler head.
The term "niger" is also from Latin, meaning "black". It refers to the dark black color of the spores produced by this fungus.
So, "Aspergillus niger" essentially means "scattered or sprinkled black spores", describing the appearance of this particular species of fungus.