Fig. 2
Pneumocystis pneumonia (PCP)-status by study year. Yearly distribution of patients with I) PCP (PCP+) based on i) positive direct immunofluorescence and/or ii) CT value below 36 (black columns; n = 140, 47.1%), II) presumed colonization (PCP−) not fulfilling the criteria for PCP (red columns; n = 116, 39.1) and III) “undetermined PCP-status”; patients without information about CT value and negative or missing DIF result (dark blue columns; n = 41, 13.8). Criteria were applied in retrospect. *The study period was from 2006 to 2017, though PCR was introduced in late 2006. CT, cycle threshold; DIF, direct immunofluorescence microscopy; PCP, Pneumocystis pneumonia; PCR, polymerase chain reaction