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

explain alternative processing, Alternative polyadenylation sites Exa...

Alternative polyadenylation sites Exact pre-mRNAs hold more than single group of signal sequences for 3' end polyadenylation and cleavage.   In  some  cases,  the  area  of  t

What is an instance of a hypothesis, Q. What is an instance of a hypothesis...

Q. What is an instance of a hypothesis which may explicate why there is not a big representation of the class Reptilia found in Polar Regions? Beings of the class Reptilia are

Define estimation of blood thiamin levels - thiamin status, Define Estimati...

Define Estimation of Blood Thiamin Levels - Thiamin Status? The levels of free thiamin and its phosphoesters in whole blood and erythrocytes are measured using high- performanc

How boiling used for sterilization, Q. How Boiling used for sterilization? ...

Q. How Boiling used for sterilization? Though highly unreliable as a sterilization technique and more effective for disinfection, it is used very often. Boiling water in hot wa

What is the formation of atherosclerosis plaques, Which of the following le...

Which of the following leads to the formation of atherosclerosis plaques? -uptake of oxidized LDL particles by macrophase -non specific interactions between LDL particles

Explain the dietary management of sepsis and mods, Explain the Dietary Mana...

Explain the Dietary Management of Sepsis and MODS? Patients suffering from sepsis and/or resultant multiple system organ dysfunctions are critically ill and admitted in the int

Tolerance range, what is tolerance range ? define and explain it ?

what is tolerance range ? define and explain it ?

Special anatomic considerations in posterior maxilla, What are the special ...

What are the special anatomic considerations in posterior maxilla?  Posterior maxilla has very poor  quality of bone demanding special consideration in implant placement. These

Domestication - wildlife, Domestication - Wildlife It means that man h...

Domestication - Wildlife It means that man has taken under his direct care the living beings which are useful to him. Through extensive breeding programmes, he has modified th

How genetic predisposition causing the underweight, How Genetic Predisposit...

How Genetic Predisposition causing the underweight? Mother's Health Status; Poor nutritional status of the girl child coupled with under nutrition during pregnancy results in L

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