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Mycobacterium intermedium sp. nov

A Meier1, P Kirschner, K H Schröder

  • 1Institut für Medizinische Mikrobiologie, Medizinische Hochschule Hannover, Germany.

International Journal of Systematic Bacteriology
|April 1, 1993
PubMed
Summary
This summary is machine-generated.

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A novel slow-growing mycobacterium, isolated from pulmonary disease patient sputum, exhibits unique enzymatic and metabolic profiles. This discovery, supported by genetic sequencing, proposes a new species: Mycobacterium intermedium.

Area of Science:

  • Microbiology
  • Bacteriology
  • Mycobacterial research

Background:

  • Pulmonary disease can be caused by various microorganisms, including mycobacteria.
  • Characterization of novel mycobacterial species is crucial for accurate diagnosis and treatment.

Purpose of the Study:

  • To identify and characterize a novel, slow-growing mycobacterium isolated from a patient with pulmonary disease.
  • To determine the taxonomic position and propose a new species name for the isolated organism.

Main Methods:

  • Isolation and cultivation of mycobacterial strains from patient sputum.
  • Biochemical testing for enzymatic activities (catalase, acid phosphatase, esterase, beta-galactosidase, arylsulfatase, urease) and metabolic properties (nicotinic acid production, nitrate reductase, amidase activities).

Related Experiment Videos

  • Analysis of mycolic acid composition and 16S rRNA gene sequencing for phylogenetic analysis.

    • Main Results:

    • The photochromogenic organism grew across a temperature range (22-41°C) and exhibited specific enzymatic activities.
    • Mycolic acid analysis revealed alpha-mycolates, alpha'-mycolates, and keto-mycolates.
    • 16S rRNA sequencing positioned the organism between rapidly and slowly growing mycobacteria, distinct from known species.

    Conclusions:

    • The unique combination of phenotypic, genotypic, and metabolic characteristics supports the classification of this organism as a new species.
    • The proposed name for the new species is Mycobacterium intermedium, with strain DSM 44049 designated as the type strain.