Pharmaceutical microbiology

1. Presentation on Pharmaceutical microbiology
Topic: Classify Bacteria Of Basis Of Energy.
MD.AMINUL ISLAM
Department of Pharmacy
WORLD UNIVERSITY OF BANGLADESH

2. Energy
With respect to energy source, organisms that are
able to use light as an energy source, are designated
as phototrophs, and organisms, which are dependent
on a chemical source, are termed chemotrophs.

3. Energy
Based on these considerations microorganisms can be
divided into four nutritional categories:
1) Photoautotrophs.
2) Photoheterotrophs.
3) Chemoautotrophs.
4) Chemoheterotrophs.

4. Photoautotrophs
Organisms using light as the energy source and
CO2 as the principal carbon source e.g. Higher
plants, algae, and photosynthetic bacteria.

5. Photoheterotrophs
Organisms using light as the energy source and
an organic compound as the principal carbon
source e.g. Certain purple and green bacteria.

6. Chemoautotrophs
Organisms using a chemical energy source and
CO2 as the principal carbon source because of
their ability to grow in strictly mineral media
in the absence of light, these organisms are
also called chemolithotrophs.

7. Chemoheterotrophs
Organisms using a chemical energy source and
an organic substance as the principal carbon
source. Chemoheterotrophs are the commonest
of all the nutritional types.

8. Temperature
The favourable temperature for the growth of
most microorganisms is the human body
temperature i.e. 37 ̊ C. on the basis of their
preferred temperature range microorganisms are
classified into three groups:
1) Psychrophiles.
2) Mesophiles.
3) Thermophiles.

9. Thank You……..That,s all.