Species/Subspecies: Aspergillus niger
Categories: Animal pathogen; spoilage organism
Etymology: Genus name: to scatter.
Species epithet: black.
Common name: Svartmögel
Significance:A. niger is found all over the world, but is less important as a pathogen in veterinary and human medicine. However, it is important as a spoilage organism.
  [Of minor importance]   
Macromorphology (smell):
Aspergillus niger Aspergillus niger Aspergillus niger 
The colonies are initially white, but the colour turns black after a few days when conidia spores begin to form. The colonies grow all over the plate.
Aspergillus nigerAspergillus niger
The conidial spores are dark brown in color and 4-5 µm in diameter.
Metabolism: Aspergillus spp. are aerobic and chemorganotrophic organisms. They are extremely important in degrading organic matter in nature. A. niger is thermotolerant.
Microbiological tests: A. niger may cause black mold on the surface of certain foods, e.g. apricots, onions, peanuts and grapes etc. This mold is therefore considered a spoilage organism.

Some strains of A. niger can produce ochratoxin A in moist grains. Ochratoxins can cause impaired kidney function and even tumors in the kidneys of several different animal species.

Spec. Char.:
Reservoir: Can be found everywhere in soil.
Genome Sequence:
ACC-No GenBankStrain/Isolate# of chromSize (Mbp)
GCA_000002855 CBS 513.88 34,0 

Mitochondrial DNA sequence:
ACC-No GenBankStrain/IsolateNumber of BP
NC_007445 N909 31 103 
Cirkulärt DNA

18S rRNA Seq:
ACC-No GenBankStrain/IsolateNumber of NT
LC573607 NBRC 31638 1155 

Taxonomy/phylogeny: Aspergillus is a very large genus, which consists of about 250 species.
Comment:A. niger is used for industrial production of i.a. citric acid and a cheese enzyme (alternative to rennet).
Reference(s): No. 4, 9, 20

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Swedish University of Agricultural Sciences