Letter | Published:

Difference between the Catalases of Acid-fast Bacilli


IT is well known fact that acid-fast bacilli, virulent and rendered resistant to isonicotinic acid hydrazide become catalase-negative. The saprophytic bacilli, on the other hand, grown in even high concentrations of isonicotinic acid hydrazide always preserve at least some residual catalase activity1,2. This difference implies that there are different catalases in the above-mentioned strains of acid-fast bacilli.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1

    Bonicke, R., Naturwiss., 41, 430 (1954).

  2. 2

    Kwiek, S. (unpublished experiments).

  3. 3

    Tysarowski, W., and Kwiek, S., Amer. Rev. Tuberc. (in the press).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.