Morphology In/On Culture Medium

When it comes to morphology in/on culture medium it gets a bit complicated. there is a difference between solid medium and liquid medium eg. agar and broth respectively.






SO PAY ATTENTION!!!





It varies with the type of agar/broth medium, nutrients, and dyes present in the medium.





The size, color, shape and consistency of a colony growing on a particular agar medium are characteristic of bacteria.

In a liquid medium, the region in which the organism grows depends on the oxygen requirement of that particular species.

Liquid medium
* Turbid
* Pellicle
(thick growth at the top of the tube
* Sediment





Solid medium





Pigmentation
*Transparent (pic 1)
* Opaque (pic 2)
* Colour pigment (pic 3)
* Fluorescent pigment(pic 4)
Transparent (pic 1)

Opaque (pic 2)








Colour (pic 3)





Fluorescent (pic 4)





Surface Properties
* Flat
* Raised
* Filamentous and
rhizoid
* Contoured
* Wrinkled
* Smooth and glistening
* Growth pattern – motile
or non motile


OR

Smell or Odors
*Sweet
* Alcohol
* Foul

References: http://en.wikibooks.org/wiki/A-level_Applied_Science/The_Role_of_the_Pathology_Service/Microbiology

http://www.bact.wisc.edu/microtextBook/index.php?module=Book&func=displayarticle&art_id=113

http://microbewiki.kenyon.edu/index.php/Micrococcus
Information: NYP SG Lecture Notes on Classification of microorganisms