Bluish colored molds are usually from Penicillum spores. Mucor produces grey-colored mold. Neurospora, causing red spores, is a genus of mold common to bread. Neurospora is also capable of converting tryptophan to niacin, and is used in genetic and enzyme research.
Aspergillus is a genus of fungi producing molds from which several species become parasitic pathogens. Aspergillosis is the disease produced, causing infections seen most often in the immunocompromised individual. Respiratory infections with lesions containing masses of mycelia develop on the skin, in the lungs or bronchi, the ear canal, sinuses, or subcutaneous tissue, and sometimes involving the bones and meninges. In the very immunodepressed patient (as those with AIDS, leukemia, or Hodgkin’s disease), systemic aspergillosis often occurs and treatment is not always successful.