To investigate the possible association between Pneumocystis carinii types
and various clinical and demographic parameters, we used molecular typing t
o analyze 93 bronchoalveolar lavage specimens from patients with P. carinii
pneumonia (PCP). Multivariate regression analysis revealed an association
between being infected with a specific P. carinii genotype and receiving an
ti-PCP prophylaxis (odds ratio, 4.4; 95% confidence interval, 1.0-18.6; P=.
05), although no association with a specific drug was detected.