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Polyomaviruses KI and WU in immunocompromised patients with respiratory disease

Thomas Mourez1, Anne Bergeron, Patricia Ribaud

  • 1Laboratory of Microbiology, Saint Louis University Hospital, Paris.

Emerging Infectious Diseases
|January 1, 2009
PubMed

Insights

New human polyomaviruses, KI (KIPyV) and WU (WUPyV), were found in respiratory samples from children. KIPyV was more common in stem cell transplant patients, suggesting a link to immunocompromised individuals.

Area of Science:

  • Virology
  • Pediatric Respiratory Infections
  • Immunocompromised Patients

Background:

  • Human polyomaviruses KI (KIPyV) and WU (WUPyV) are recently identified viral agents.
  • These viruses are primarily detected in respiratory tract specimens, particularly in children.
  • Their clinical significance and prevalence in different patient populations require further investigation.

Purpose of the Study:

  • To determine the prevalence of KIPyV and WUPyV in adult patients with respiratory disorders.
  • To investigate the association between KIPyV and WUPyV detection and specific patient groups, such as stem cell transplant recipients.

Main Methods:

  • Retrospective analysis of respiratory specimens from 200 patients admitted to Saint Louis Hospital.
  • Polyomavirus detection using molecular methods (e.g., PCR).
  • Statistical analysis to compare virus frequencies between patient groups.

Main Results:

  • KIPyV was detected in 8% of patients, and WUPyV in 1% of the cohort.
  • KIPyV detection was significantly higher in human stem cell transplant patients (17.8%) compared to other patients (5.1%; p = 0.01).

Conclusions:

  • KIPyV is present in adult patients with respiratory disorders and shows a higher prevalence in immunocompromised individuals, specifically stem cell transplant recipients.
  • WUPyV appears less common in this patient cohort.
  • Further research is warranted to understand the pathogenic role and transmission of these polyomaviruses in vulnerable populations.

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