Aspergillus niger is a fungus and one of the most common species of the genus Aspergillus. It causes black mould on certain types of fruit and vegetables, and is a common contaminant of food.

Disease risks

Aspergillus niger is less likely to cause disease than some other Aspergillus species, but if large amounts of the spores are breathed in, the serious lung disease aspergillosis can occur. Aspergillosis is particularly frequent among horticultural workers breathing in peat dust which can be rich in Aspergillus spores. It is less harmful, though not entirely free from risks, if eaten and digested.

Uses

In culture, Aspergillus niger is used in the manufacture of citric acid (E330), gluconic acid (E574) and the enzyme alpha-galactosidase (Beano®, Bean-zyme™) and has been assessed as acceptable for daily intake by the World Health Organisation.

External links

• Aspergillus website (Manchester University, UK)
• Aspergillosis information (Center for Disease Control)
• World Health Organisation report on Aspergillus niger