SFTPA1 and aspergillosis: SP-A and SP-D surfactant proteins attach to A. fumigatus conidia via a calcium-dependent receptor, which increases phagocytosis and fungal destruction by neutrophils and alveolar macrophages [3, 32]; the fungal ligands recognized by SP-A include two N-glycosylated glycoprotein antigens (gp45 and gp55 kDa) secreted by A. fumigatus, which have been recovered from culture filtrates and used for immunodiagnosis of aspergillosis [32].