Abbreviations: BAL, bronchoalveolar lavage; CYB, cytochrome b (cyt b) gene; HIV, human immunodeficiency virus; HTRs, heart transplant recipients; PCP, Pneumocystis pneumonia.

^aPatients were monitored at Bichat–Claude Bernard hospital, Paris, France, and P. jirovecii isolates were examined at the CYB gene.

^bCytochrome b alleles were named using nomenclature described elsewhere by Esteves et al [15] and Maitte et al [16].

^cCYB2 (C350T) allele corresponds to allele CYB2, as described elsewhere by Esteves et al [15], but it harbors a previously undescribed mutation on position 350 (C350T).

^dPatient C5 presented with a mixed infection related to association of the alleles CYB1 and CYB7.

^ePatients C8 and C11 presented with mixed infections. The alleles were not identified because polymorphisms were observed at 2 nucleotide positions; that is, 2 peaks were observed on chromatograms at 2 different positions.

^fPatient C9 presented with a mixed infection related to association of the alleles CYB1 and CYB2.