Aspergillus niger is another industrially important species and involved in the production of citric acid and
certain commercial enzymes.
A. fumigatus, A. flavus and A. terreus can act as opportunistic organisms causing
infections in immuno-suppressed individuals [1] and [2]. A. flavus and A. parasiticus are prominent in
producing secondary metabolites, including aflatoxins [3] and [4]. With regard to human health risk, A.
fumigatus arguably is the most notorious species [2]. In this regard studies on the healthy and immunodeficient
mice demonstrated that A. flavus pathogenicity is approximately 100 times higher than A. fumigatus