A Positive test result means that you have Aspergillus fungus antibodies in your blood. This could mean you have been exposed to the fungus, but you may not have a current infection. Chronic pulmonary aspergillosis (CPA) is a slowly progressing pulmonary fungal infectious disease caused by Aspergillus. Aspergillus IgG, IgM are now considered to be valuable biomarkers in CPA diagnosis.