Colony count 1000 cfu/ml什麼意思

"Colony count 1000 cfu/ml" is a microbiological term that refers to the number of colony-forming units (CFUs) per milliliter of a sample. In other words, it indicates the concentration of viable bacteria or fungi in a liquid sample.

A colony-forming unit is a single bacteria or fungal cell that, under the right conditions (such as when plated on an agar medium), can grow and divide to form a visible colony of identical cells. The colony count is a direct measure of the number of viable microorganisms in a sample.

In the context of "1000 cfu/ml," this means that there are 1000 individual colonies of bacteria or fungi per milliliter of the sample. This measurement is typically obtained by taking a serial dilution of the sample, plating it on an appropriate growth medium, and then counting the number of colonies that form after incubation.

Colony count is a crucial parameter in various fields, including food science, water quality testing, pharmaceuticals, and clinical microbiology, where it helps in assessing the levels of microbial contamination or in monitoring the effectiveness of sterilization processes.