Bacterial cell morphology
Introduction.
Although there are hundreds of different bacteria species, but a bacteria in the
form
The single cell will have one of three commonly known forms, namely:
a. Round shape / elliptical / spherical shape that is commonly called Coccus.
breakfast. The form of a stem that is commonly called basil.
C.. Spiral form.
Bacteria are round or coccus, often show variations in shape. Variations
It is often used as a distinctive feature in the type of identification process. Some
variations
These forms include:
a. Diplococcus: Two cells are mixed or paired with each other.
breakfast. Streptococcus: string cells that are more than 4 cells and form a
strand
resemble a chain.
C.. Tetrad or Tetracoccus: four cells that are mourning each other
A form that resembles a square.
d. Staphylococcus: a collection of rolling cells, so it resembles fruit
wine.
Hey. SARCINA: a group consisting of 8 cells (4 cells on the front and 4 cells on
The back) that forms a form that resembles a cube.
Unlike the round shape bacteria, bacteria shape stems (basil) rarely
Being in the variation above. In this stem form bacteria, variations above (rare)
It is not a characteristic of this bacterium. If there is a variation in
the form of this basil bacteria, then it tends to be caused by the stage
Its growth or conditions that affect these cultures.
Spiral-shaped bacteria are generally found in solitary or cellitory forms
Single and not a collection of cells that are nourishing.
In this practicum you will be introduced some special bacterial species
represent the shape form above. Besides that there will also be introduced by
several structures
outside and structure in bacteria, such as flagella, capsula, and endospora, as
complement the bacterial morphology.
Needed tools and materials
a. Light microscope.
breakfast. Emersion oil
C.. Glass objects and fixation tools
d. Bacterial culture (preferably young).
Hey. OSE Needle (Loop)
f. Burner (Bunsen)
2.3. Work
a. Observe the forms of bacterial cells provided by the assistant and supervisor
brother practicum, using a light microscope and start with
Weak magnification.
breakfast. When observations are unclear, do observations with the objective
lens
100 x. (Remember: Wear oil emersion on this 100 X magnification).
C.. Draw bacterial forms and their variations in your journal Journal.
d. Clean the emersion oil on the lens you wear using a solution
Xylol (Remember: Carefully works with this Xylol, because it is carcinogenic /
cause
Cancer occurrence).
