Prototheca wickerhamii algaemia: an emerging infection in solid organ transplant recipients

T D Bandaranayake1, A Paniz Mondolfi2, D R Peaper2

  • 1Section of Infectious Diseases, Yale School of Medicine, New Haven, Connecticut, USA.

Insights

Prototheca wickerhamii, a rare alga, caused a fatal disseminated infection in a renal transplant recipient. Early diagnosis using matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF) is crucial for improving outcomes in immunocompromised patients.

Area of Science:

  • Medical Mycology
  • Infectious Diseases
  • Transplant Medicine

Background:

  • Prototheca wickerhamii is an alga rarely causing human disease.
  • Infections are increasingly reported in immunocompromised individuals.
  • Solid organ transplant recipients are a vulnerable population.

Observation:

  • A fatal case of disseminated P. wickerhamii infection occurred in a renal transplant recipient.
  • The initial presentation was a cutaneous lesion.
  • Disseminated disease progressed despite voriconazole treatment.

Findings:

  • Review of literature on protothecosis in solid organ transplant recipients.
  • Demonstration of P. wickerhamii's potential for severe, disseminated disease.
  • Voriconazole may not be effective in all cases.

Implications:

  • Highlights the importance of considering P. wickerhamii in immunocompromised patients with unusual infections.
  • Emphasizes the diagnostic value of advanced microbiology techniques like MALDI-TOF.
  • Suggests a need for further research into effective treatment strategies for protothecosis.

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