Microbiology practical: Aggregate and viable counts of microorganisms



Aggregate and viable counts of microorganisms

There are separate courses control determining aggregate and viable counts of microorganisms

Aggregate Cell counting is used

Viable counting are used

Details of uses of cell counting, including their advantages and disadvantages.

There are separate courses control determining aggregate and viable counts of microorganisms

Embrace other courses and embrace references to your beginning

Brief particular of your express exemplification, mentioning the organism and which techniques allure be used

Aggregate Viable Count – This involves counting the colonies performed by viable cells beneath adminicular enlargement provisions. In pour-extract course, an aliquot of gratefully easy specimen is partial with nutrient agar at a latitude where it is watery. Then the structure is poured into petridishes and referableorious to firm.

Alternatively an aliquot of the specimen is public balance the agar manner of a Petridis using a unproductive publicer. Membrane defecates can to-boot be used to detail the bacterial quantity. In this course cells are defecateed onto membrane defecate which is then placed balance nutrient agar manner.

Aggregate Cell Count – The most despicable course of enumerating the aggregate microbial cells is the straightforward counting of cell suspension in a counting berth of referableorious bulk using a microscope. One such counting berth is Neubauer counting berth. Another course involves an electronic utensil, Coulter against.





Materials and courses:

1 ) A pour extract course using viable count:

Explain the act where cells crosses gridlines of the haemocytometer


In this argument you should sift-canvass the falsitys associated with size of viability. Sift-canvass ways of decent the exemplification and whether this could be achieved with the esthetic provided

The exemplification could be improved by:

  • Transferring the easy key quicker to the agar extract, so that the extract allure referable procure putrid by the spectre.
  • The exemplification could be numerous over than 3 dates control a reliable test

The main beginning of falsity occurred during exemplification was leaving the agar extract lid public to controlward the dilutions control a covet date which could of putrid the agar extract by spectre.

(Madigan, 2009)


  • Madigan, M. C. (2009). Brock Biology of Microorganisms (12th edition ed.). San Francisco: Pearson interdiplomatic Education.