In virology, a plaque-forming unit (PFU) is a measure of the number of particles capable of forming plaques per unit volume, such as virus particles. It is a functional 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 ...
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<virology> Number of infectious virus particles or Ig producing cells per unit volume. ... See: plaque assay. ... <microbiology> Refers to any entity which can give rise to a plaque. For example: if a phage stock solution has 1010 pfu/ml, it means that every ml of this stock has 1010 phage particles which can form plaques. This (pfu/ml)...
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Number of Ig-producing cells or infectious virus particles per unit volume. Of a virus like bacteriophage l , the number of viable viral particles, established by counting the number of plaques formed by serial dilution of the library. For example, a cDNA library might have a titre of 50,000 pfu/ml of library.
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