Define plate counts and colony forming unit, Biology

Assignment Help:

Define Plate Counts and Colony Forming Unit?

Plate counts is the most frequently used method to measure microbial numbers. The technique, however, can be used only for those microorganisms, which are able to grow and reproduce on microbial media. Here a diluted sample of microbes is dispersed over suitable nutrient agar medium. There are two ways of performing a plate count - the spread plate and pour plate technique about which we have already studied in the last practical. Look up these techniques once again. Each microorganism then produces a distinct colony. Original number of viable microorganism in a sample is then calculated from the number of colonies formed and the sample dilution used. The results are reported in form of colony forming units (CFU) per ml of the sample.

Colony forming unit/ml can be expressed as:

CFU/ml = (No. of colonies formed * dilution factor) / Volume Sampled


Related Discussions:- Define plate counts and colony forming unit

What is oxidative phosphorylation, What is oxidative phosphorylation? O...

What is oxidative phosphorylation? Oxidative phosphorylation is  the process by which ADP is phosphorylated by Pi  to ATP  in  the  respiratory chain.

Bty100, 1. (a) Which physicochemical properties need to be regulated by the...

1. (a) Which physicochemical properties need to be regulated by the cell? Define chemical equilibrium and discuss how it is maintained by the cell. (b) Differentiate between facili

Transport of instruments to the sterilization area, Most dental offices hav...

Most dental offices have a designated area for instrument reprocessing that is separate from the dental treatment room. This is ideal, since cleaning, sterilizing and storing instr

Sexual selection, In this section you will be introduced to a variant of Da...

In this section you will be introduced to a variant of Darwinian concept of natural selection which he termed sexual selection. You may have observed very distinct and striking dif

Uses of microbes in industry-amino acids and vitamins, Normal 0 ...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Who is aristotle - ancient greeks and romans, Who is Aristotle - the Stagir...

Who is Aristotle - the Stagirite? The ptodigious activity of Aristotle (384-323 B.C.) marks the climax of the Golden Age of Greece. The very existence of his works proves not s

Stages of aerobic respiration, Stages of Aerobic Respiration: Glycoly...

Stages of Aerobic Respiration: Glycolysis (cytoplasm) Process 2ATP used for Glucose -> Fructose 1,6 bisphosphate Fructose splits into G3P and DHAP. DHAP

Classification of zoonoses disease , Classification of zoonoses More t...

Classification of zoonoses More than 300 zoonoses of diverse etiologies are recognized. Thus, a very large number of zoonoses call for classification, especially for teaching

What are cells with a delimited nucleus called, What are cells with a delim...

What are cells with a delimited nucleus called ? What are the main elements of the nucleus? Cells with delimited nucleus are known as eukaryotic cells. Organisms composed of on

Explain about pre-surgical prosthodontics, Pre-surgical Prosthodontics ...

Pre-surgical Prosthodontics Radiographic investigation: The radiologic investigations are critical to evaluate the bone quality and bone quantity. 1. Panoramic Radiograph

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd