(6 points) A 0.6% phenol solution was used to disinfect a 3-hour cultu

(6 points) A 0.6% phenol solution was used to disinfect a 3-hour cultu

(6 points) A 0.6% phenol solution was used to disinfect a 3-hour culture of Bacillus paratyphosus, the organism that causes paratyphoid fever. Triplicate subsamples of the culture were taken at various times after the addition. The mean numbers of viable organisms were 129, 112, 81, 78, 64, 38, 19, 12, and 1 at 1, 2, 4, 5, 7, 10, 15, 20, and 32 minutes, respectively.What proportion of the organisms died every minute?If the culture contained 8 105 viable bacteria/ml when the disinfectant was added, how long was it until 99.9% of the organisms were killed?