How Do You Calculate Log Reduction In Disinfectant Validation Complete Guide

how do you calculate log reduction in disinfectant validation. Log Reduction Values Reduction in pathogen concentrations in recycled water are calculated using log reduction values LRV. For example if 1000 cfu is the initial count then its log will be 3 and after analysis if you get 10 cfu its log will be 1 then initial log 3- final log 1 2.

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A 1log reduction of 1000000 CFUs would result in 100000 CFUs remaining. The LRV required for each end use of recycled water is based on the likely exposure volumes ingested from the use of the water. Log Reduction log N o Log N.

Calculating Log Reduction Values.

Efficacy testing will be one of the key steps in the disinfectant validation process. A 4-Log Reduction on a surface with 1000000 CFUs would leave 100 CFUs which is written as a 9999 reduction in potentially harmful microorganisms. A section of Table A. 1000 bactreia 2log reduction 1000-100 900 kill the bactria.