Role of potassium tellurite and brain heart infusion in expression of the hemolytic phenotype of Listeria spp. on agar plates

Jose Francisco Fernández-Garayzábal, C Delgado, M. Blanco, Jose A Vazquez-Boland, V Briones, G Suarez, L Dominguez

Research output: Contribution to journalArticlepeer-review

Abstract

The influence of potassium tellurite (PT) and brain heart infusion agar (Difco), two components of modified Listeria selective agar medium (LSAMm), on the hemolytic phenotype of Listeria spp. was studied. L. monocytogenes and L. ivanovii displayed bigger zones of hemolysis on brain heart intusion agar compared with on Columbia agar base. The addition of PT increased the sizes of zones of hemolysis displayed by L. monocytogenes. This effect seemed to be produced by the enhancement of the cytolytic effect of listeriolysin O. PT decreased the hemolysis produced by L. ivanovii, and this effect seemed to be due to an inhibition of the sphingomyelinase C produced by this species.
Original languageEnglish
Pages (from-to)434-8
Number of pages5
JournalApplied and Environmental Microbiology
Volume58
Issue number1
Publication statusPublished - Jan 1992

Keywords

  • Culture Media/pharmacology
  • Hemolysis
  • Listeria/drug effects
  • Listeria/metabolism
  • Phenotype
  • Tellurium/pharmacology

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