Current Microbiology

, Volume 37, Issue 3, pp 156–158

Bacteriological Properties of a Sucrose-Fermenting Corynebacterium diphtheriae Strain Isolated from a Case of Endocarditis

  • Ana Luiza de  Mattos-Guaraldi
  • Luiz Carlos Duarte  Formiga

DOI: 10.1007/s002849900356

Cite this article as:
Mattos-Guaraldi, A. & Formiga, L. Curr Microbiol (1998) 37: 156. doi:10.1007/s002849900356
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Abstract.

An atypical sucrose-fermenting Corynebacterium diphtheriae strain was isolated from three blood cultures of a 14-year-old girl presented to a university teaching hospital in Rio de Janeiro, Brazil. She had mitral endocarditis that proved to be fatal despite intensive antibiotic therapy. Blood cultures showed a fluorescent Gram-positive, aerobic, coryneform-like bacillus presenting pyrazinamidase and CAMP reaction negative. The isolate was identified as a toxigenic strain of C. diphtheriae var. mitis by both Elek and radial immunodiffusion (RID) tests. The invasive C. diphtheriae sucrose-fermenting biotype strain adhered to glass surfaces and expressed pronounced hemagglutinating activity (titer 8), a property common among the nonfermenting biotype strains. Laboratories should be alert to the possibility of the isolation of C. diphtheriae with a positive sucrose fermentation test, especially when nontoxigenic strains are isolated from uncommon anatomic sites.

Copyright information

© Springer-Verlag New York Inc. 1998

Authors and Affiliations

  • Ana Luiza de  Mattos-Guaraldi
    • 1
  • Luiz Carlos Duarte  Formiga
    • 1
  1. 1.Departamento de Microbiologia Médica, Instituto de Microbiologia, UFRJ and Disciplina de Microbiologia e Imunologia, Faculdade de Ciências Médicas, UERJ. Av. 28 de Setembro, 87, Fundos, 3° andar. Vila Isabel, Rio de Janeiro, RJ, Brasil CEP 20.551-030 BR