Mold is a common name for filamentous fungi, which means "moldy fungi". They tend to form lush mycelium, but they don't produce large fruiting bodies like mushrooms. In wet and warm places, many objects will grow fluffy, flocculent or cobweb-like colonies visible to the naked eye, that is, mold; Bio-Rad Aspergillus antigen detection kit (PlateliaTM Aspergillus Ag) is widely used for Aspergillus detection.