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

Determine the photographic analysis, Photographic Analysis Documentatio...

Photographic Analysis Documentation is critical in any clinical procedure and more importantly in this field where due to the cost of the treatment involved, there is little ma

Viral Replication, 1. You are observing adsorption of a virus to the host c...

1. You are observing adsorption of a virus to the host cell, it uses long leg-like structures, what are they called?

What are infructescences fruits and pseudofruits, What are infructescences,...

What are infructescences, pseudofruits and parthenocarpic fruits? Infructescences are aggregated fruits created from inflorescences, aggregated flowers. Grape clusters are inst

Drowning - paediatric emergencies, Drowning: Drowning is a cause of a...

Drowning: Drowning is a cause of accidental death  in children Accidental drowning may occur because children  do not  have adequate protective supervision.  It may be defined

Nitrogen cycle, Nitrogen is very important constituents of all organisms li...

Nitrogen is very important constituents of all organisms life  because it forms the structural parth of proteins, nucleic acids and chlorophyll molecules.               Earth 's

Respiration, lesson plan practical requirements

lesson plan practical requirements

Importance of primary prevention of diabetes mellitus, Q. Importance of Pri...

Q. Importance of Primary prevention of diabetes mellitus ? Primary prevention has been found to be cost effective in the long run as it reduces unwarranted human suffering. Pre

Explain procedure for checking the presence of rhodamine b, Explain Procedu...

Explain Procedure for Checking the Presence of Rhodamine B? Conduct the experiment following the procedure given herewith: 1. Pour liquid paraffin or mineral oil in a Petri

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