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Plaque-forming unit

From Wikipedia, the free encyclopedia

A plaque-forming unit (PFU) is a measure used in virology to describe the number of virus particles capable of forming plaques per unit volume. It is a proxy measurement rather than a measurement of the absolute quantity of particles: viral particles that are defective or which fail to infect their target cell will not produce a plaque and thus will not be counted.

For example, a solution of tick-borne encephalitis virus with a concentration of 1,000 PFU/μL indicates that 1 μL of the solution contains enough virus particles to produce 1000 infectious plaques in a cell mono-layer, but no inference can be made about the relationship of PFU to number of virus particles. The concept of plaque-forming units of virus is equivalent to the concept of colony-forming units of bacteria.

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See also

References

https://www.sciencedirect.com/topics/immunology-and-microbiology/plaque-forming-unit

External links

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This page was last edited on 27 September 2023, at 22:06
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