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Candida parapsilosis characterization in an outbreak setting

Duncan M Kuhn1, Pranab K Mikherjee, Thomas A Clark

  • 1University Hospitals of Cleveland and Case Western Reserve University, Cleveland, Ohio 44106, USA.

Emerging Infectious Diseases
|June 23, 2004
PubMed

Insights

Candida parapsilosis outbreaks in hospitals are linked to specific genetic strains. These strains show increased biofilm production, suggesting it plays a key role in infections.

Area of Science:

  • Medical Mycology
  • Infectious Diseases
  • Molecular Biology

Background:

  • Candida parapsilosis is a significant non-albicans Candida species causing hospital-acquired infections.
  • Limited research exists correlating C. parapsilosis outbreaks with specific virulence factors.

Purpose of the Study:

  • To investigate the genetic variability of C. parapsilosis isolates from an outbreak.
  • To correlate genotypic data with phenotypic virulence factors in C. parapsilosis.

Main Methods:

  • DNA fingerprinting was employed to assess genetic diversity among outbreak and clinical isolates.
  • Phenotypic virulence factors including adherence, biofilm formation, secretory aspartic protease (SAP), and phospholipase activity were quantified.

Main Results:

  • DNA fingerprinting revealed outbreak isolates were clonal and genetically distinct from other clinical isolates.
  • The outbreak clone exhibited significantly higher biofilm production compared to sporadic isolates (p < 0.0005).
  • Adherence and protein secretion levels did not correlate with strain pathogenicity.

Conclusions:

  • Biofilm production is a critical virulence factor implicated in Candida parapsilosis outbreaks.
  • The findings highlight the importance of biofilm formation in the pathogenesis of C. parapsilosis hospital infections.

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