Bacteria :Growth & osmatic pressure

Its important to understand how bacteria grow; so that in the condition of disease we can interfere with it. we will consider some requirement of bacteria to grow; several factors influence of bacteria & these includes Temperature, osmotic pressure, pH, Barometric pressure, Gases, Radiation, & Chemicals & presence of neighboring microbes

1. Osmotic pressure
we can define it as the power that drive the solvents across a semi-permeable membrane from low concentration solvent to high concentration.
the concentration of solute play an important role in the growth of bacteria, for example the concentration of salts in pickling inhibits the growth of bacteria; although there are some bacteria that are able to grow (tolerate high concentration of salts) & these called Halophiles 
Based on the concentration of solute we classify into:

1. Hypertonic
2. Hypotonic 

to make it easy to understand difference between hypertonic & hypotonic we will compare bacteria with RBC (Red Blood Cell)
In Hypertonic 

• if we put RBC in hypertonic solution --- RBC will shrink & know RBC will call "crenated red blood cell" 
• if we put Bacteria; here will have a different condition because of the presence of cell wall & the cell will shrink & bacteria will call now "Plasmolysis"

In Hypotonic

• in the case of RBC The Solvent will pass to cell ---- RBC will swell & explode --- this will call hemolysis
•  In case of Bacteria; it will swell but will not explode; because of the cell wall --- this called Palsmoptysis