Keith A. Powell’s scientific contributions

... the identification of Penicillium based on morphological methods requires adequate growth for evaluation of colony characteristics and microscopic features [43] . A culture time of 5 days or more is generally required for identification of anamorphic forms of Penicillium. ...

Reference:

Biodegradation of Nonylphenol Ethoxylate in waste water by Penicillium chrysogenum

... Species of Aspergillus, in particular, sporulate profusely, with each conidial head releasing hundreds of conidia into the atmosphere with a diameter tiny enough to reach the alveoli of the lungs via the upper respiratory tract. If spores are concentrated in the lungs, the fungi can spread to other regions of the body, causing either localised or systemic infections that typically result in death (Powell et al., 1994). Immuno-suppression is a crucial component that makes birds more susceptible to infection. ...

Reference:

AN INVESTIGATION ON AN OUTBREAK OF SYSTEMIC ASPERGILLOSIS IN POULTRY BIRDS AND ITS MANAGEMENT