Pneumocystis jirovecii in the air surrounding patients with Pneumocystis pulmonary colonization

Diagn Microbiol Infect Dis. 2015 Jun;82(2):137-42. doi: 10.1016/j.diagmicrobio.2015.01.004. Epub 2015 Jan 15.

Abstract

In this study, Pneumocystis jirovecii was detected and characterized in the air surrounding patients with Pneumocystis pulmonary colonization. Air samples were collected in the rooms of 10 colonized patients using Coriolis® μ air sampler at 1m and 5m from the patient's head. P. jirovecii DNA was amplified and genotyped in pulmonary and air samples at the mitochondrial large subunit ribosomal RNA gene. P. jirovecii DNA was detected in 5 of the 10 air samples collected at 1m and in 5 of the 10 other air samples collected at 5m. P. jirovecii genotyping was successful in 4 pairs or triplets of air and pulmonary samples. Full genotype matches were observed in 3 of the 4 pairs or triplets of air and pulmonary samples. These results provide original data supporting P. jirovecii exhalation from colonized patients and emphasize the risk of P. jirovecii nosocomial transmission from this patient population.

Keywords: Airborne transmission; Colonization; Exhalation; Pneumocystis jirovecii.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Air Microbiology*
  • DNA, Fungal / chemistry
  • DNA, Fungal / genetics
  • DNA, Ribosomal / chemistry
  • DNA, Ribosomal / genetics
  • Female
  • Genotype
  • Humans
  • Male
  • Middle Aged
  • Pneumocystis carinii / classification
  • Pneumocystis carinii / genetics
  • Pneumocystis carinii / isolation & purification*
  • Pneumonia, Pneumocystis / microbiology*
  • RNA, Ribosomal / genetics
  • Sequence Analysis, DNA

Substances

  • DNA, Fungal
  • DNA, Ribosomal
  • RNA, Ribosomal
  • RNA, ribosomal, 26S