The presence of Pneumocystis jirovecii DNA in plasma is associated with a higher mortality rate in patients with AIDS-associated Pneumocystis pneumonia.

: To examine the relationship between Pneumocystis jirovecii DNA (PJ-DNA) levels in blood from AIDS-associated Pneumocystis pneumonia (AIDS-PCP) and mortality, and to correlate mitochondrial large subunit rRNA (mtLSUrRNA) gene polymorphism with mortality, we performed a retrospective study including AIDS-PCP patients between 2014 and 2016 from one hospital in China. PJ-DNA in plasma was measured by nested polymerase chain reaction (PCR) of the mtLSUrRNA gene and in positive specimens we further detected the level of PJ-DNA using qPCR. Polymorphisms were observed at two positions (85 and 248) of the mtLSUrRNA gene by sequencing. The PJ-DNA positivity rate for survivors and nonsurvivors was 13.64% (9/66) and 78.57% (11/14) (P ≤ .001), respectively. Using multivariate analysis, we found that lactate dehydrogenase, PaO2, albumin and PJ-positive in blood were independent predictors of death (P = .011; P = .042; P = .01; P ≤ .001, respectively). The PJ-DNA level in the nonsurvivor group (n = 11) was higher than that of the survivor group (n = 9) (54610.3copies/ ml vs. 934.5 copies/ml, P = .006). Nine had genotype 1, and 88.89% (8/9) patients died. Of nine with genotype 3, 11.11% (1/9) died (P = .003). In conclusion, high PJ-DNA level detected by analyzing plasma and mtLSUrRNA genotype 1 are strongly associated with death in AIDS-PCP patients.