Bacillus subtilis: var. niger / var. globigii

Hilde Bastaerts h.bastaerts at
Wed Jan 12 15:16:41 EST 2000

We use Bacillus subtilis spore strips for validating and monitoring ETO and
dry heat sterilization cycles. Is var. niger as well as var. globigii
suitable for both purposes? Or is var. niger the preferred organism for ETO
cycles, and var. globigii for dry heat cycles - or vice versa?

Hilde Bastaerts
Alcon-Couvreur, Microbiology Lab
h.bastaerts at

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