Process Time and Spore Reduction


Altapure's D-Value = 2.3 – 2.6 minutes

Spore reduction is extremely important, but “the time” to achieve a “total reduction or no spore growth” is equally important since time is money. Having a room or facility tied up for surface disinfection interrupts productivity and profitability.

The “D-Value” is the time required to kill 90% of the targeted organisms being studied, at a certain temperature. For example, after a colony is reduced by 1 D, only 10% of the original organisms remain. The population number has been reduced by one decimal place in the counting scheme.

By comparing the “D-Value” of a disinfection system, one can determine the speed at which the targeted organisms can be neutralized or killed within the treated environment.

* Lower D-Value = Better Performance *

Since “bacterial spores”, and more specifically Geobacillus stearothermophilus (ATCC # 12980) and Bacillus atrophaeus (ATCC # 9372), are the most difficult forms of microbiological organisms to neutralize, the “D-Value” for these challenges is also a very important consideration to determine the efficacy, usability, and profitability, of a disinfection system.

Altapure's third party spore testing with Mesa Laboratories, Inc. (Raven Biological Laboratories), has shown that very brief exposure times to Altapure's sub-micron aerosol consisting of Altacare ®, within the treated area, demonstrates a very low and desired “D-Value” data for the gold standard medical grade spores of Geobacillus stearothermophilus of 2.3 – 2.6 D-Value (meaning a 90% kill within only 2.3 to 2.6 minutes of treatment) for this bacterial spore, as shown below:

* The results from this “D-Value” study can be accessed by clicking here.

* To learn more about “D-Value” please click here, for a paper provided by Mesa Laboratories, Inc.