this presentation is about classification of bacteria. in this presentation you will study about different types of classification of bacteria.

2. Classification of Bacteria
Prepared by: Asad khan
Roll No: B-01
5th Semester
BS Botany

3. Classification of Bacteria
1. Morphological
2. Anatomical
3. Nutrition
4. Motility
5. Pathogenicity

5. Cocci
 Spherical or oval in shape.
o Monococci (Cocci in singles) – Monococcus spp.
o Diplococci (Cocci in pairs) – Streptococcus pneumoniae
o Staphylococci (Cocci in grape-like clusters) – Staphylococcus aureus
o Streptococci (Cocci in chains) – Streptococcus pyogenes
o Tetrad (Cocci in group of four) - Micrococcus spp.
o Sarcina (Cocci in group of eight) - Sarcina rosea

7. Bacilli
 Rod-shaped bacteria
o Diplobacilli - e.g. Clostridium
o Streptobacilli
o Palisades
o Coccobacilli
o Comma-shaped

9. Spirals
 Spiral or curved shaped.
 Vibrio e.g. Vibrio cholerae
 Spiral e.g. Spirillus
 Spirochete e.g. Treponema pallidum

11. Capsule
 Capsulated
o Capsules are present.
o E.g. Streptococcus pneumoniae
 Non-capsulated
o Capsules are absent
o E.g. Viridans streptococci

12. Flagella
 Flagellate –
o Monotrichous - one flagellum
o Lophotrichous - group of flagella on one side.
o Amphitrichous - single flagella on both sides.
o Amphilophotrichous - group of flagella on both sides.
o Peritrichous - many flagella
 Aflagellate - Shigella spp.

15. Autotrophic Bacteria
 Photoautotrophic Bacteria
o Contain bacterio-chlorophyll
o Perform photosynthesis in presence of sunlight.
o Prepare their own food.
o Examples: Rhodopseudomonas, Chloroflaxi, Cyanobacteria etc.
 Chemoautotrophic Bacteria
o Convert inorganic compound to organic compound and get their food.
o Use inorganic compounds such as NH3 , NO2, NO3 , SO2 etc.
o Examples: Nitrobacter and Nitrosomonas

16. Heterotrophic Bacteria
 Saprobes
o Get food from dead organic matters.
o Also known as decomposers.
 Parasites
o Get food from living host.
o Harm host.
o Cause diseases in host.
 Symbiont
o Make symbiotic association with other organisms.
o Association may be mutualism or commensalism.
 Mutualism - both parents gets benefits.
 Commensalism – bacteria get benefit and other host neither harm nor benefited.

18. On the basis of Motility
 Motile
o Salmonella
o Vibrio cholerae
o Pseudomonas etc.
 Non motile
o Staphylococcas,
o Shigella.

20. On the basis of Pathogenicity
 Pathogenic
o Cause disease in host.
 Non-Pathogenic
o Do not cause disease.