Genetic diversity among clinical isolates of Acremonium strictum determined during an investigation of a fatal mycosis

Thomas J. Novicki, Karen LaFe, Lynda Bui, Uyen Bui, Robert Geise, Kieren Marr, Brad T. Cookson

Research output: Contribution to journalArticle

Abstract

Primarily saprophytic in nature, fungi of the genus Acremonium are a well-documented cause of mycetoma and other focal diseases. More recently, a number of Acremonium spp. have been implicated in invasive infections in the setting of severe immunosuppression. During the course of routine microbiological studies involving a case of fatal mycosis in a nonmyeloablative hematopoietic stem cell transplant patient, we identified a greater-than-expected variation among strains previously identified as Acremonium strictum by clinical microbiologists. Using DNA sequence analysis of the ribosomal DNA intergenic transcribed spacer (ITS) regions and the D1-D2 variable domain of the 28S ribosomal DNA gene (28S), the case isolate and four other clinical isolates phenotypically identified as A. strictum were found to have 99% homology to the type strain at both loci. These results suggest that five out of the six clinical isolates belong to species other than A. strictum or that the A. strictum taxon is genetically diverse. Based upon these sequence data, the clinical isolates were placed into three genogroups.

Original languageEnglish (US)
Pages (from-to)2623-2628
Number of pages6
JournalJournal of Clinical Microbiology
Volume41
Issue number6
StatePublished - Jun 1 2003
Externally publishedYes

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Acremonium
Mycoses
Ribosomal DNA
Mycetoma
Hematopoietic Stem Cells
DNA Sequence Analysis
Immunosuppression
Fungi
Genotype
Transplants
Infection
Genes

ASJC Scopus subject areas

  • Microbiology (medical)
  • Microbiology

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Genetic diversity among clinical isolates of Acremonium strictum determined during an investigation of a fatal mycosis. / Novicki, Thomas J.; LaFe, Karen; Bui, Lynda; Bui, Uyen; Geise, Robert; Marr, Kieren; Cookson, Brad T.

In: Journal of Clinical Microbiology, Vol. 41, No. 6, 01.06.2003, p. 2623-2628.

Research output: Contribution to journalArticle

Novicki, Thomas J. ; LaFe, Karen ; Bui, Lynda ; Bui, Uyen ; Geise, Robert ; Marr, Kieren ; Cookson, Brad T. / Genetic diversity among clinical isolates of Acremonium strictum determined during an investigation of a fatal mycosis. In: Journal of Clinical Microbiology. 2003 ; Vol. 41, No. 6. pp. 2623-2628.
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