Which of the following is NOT a direct method for measuring the number of microbes in a sample?

Question

Quizplus · Accepted Answer

Turbidity is an indirect method for measuring the number of microbes in a sample. It measures the amount of light that is scattered by the cells in a sample, which can give an estimate of the density of the microbial population, but does not directly count the number of microbes present. Viable plate counts, Coulter counters, MPN, and membrane filtration all directly measure the number of microbes in a sample.

Which of the Following Is NOT a Direct Method for Measuring