Pathogenesis and Classification of Paracocidioidomycosis: New Insights From Old Good Stuff
Abstract Different classifications of paracoccidioidomycosis emerged since its discovery in 1908, culminating in the proposition of a simplified and consensual one in 1987. However, by revisiting these classifications, case-reports or case-series from which the authors based their own, we found many patients who never truly fitted, neither in the 1987’s classification nor in the correspondent natural history/pathogenesis view. Herein, the concepts of paracoccidioidomycosis-infection, primary pulmonary paracoccidioidomycosis (PP-PCM) and other subclinical forms of PCM are reassessed. A classification is proposed to encompass all these subtle but distinct outcomes. We suggest a continuum between the PP-PCM and the overt chronic form of disease, and not the current view of quiescent foci, frozen in time and suddenly reactivated for unknown reasons. Failure to fully resolve the infection since its initial stages is a conceivable hypothesis for the chronic form. The proposed clinical classification might offer new insights to better characterize and manage PCM patients.