This document outlines various ways that bacteria can be classified, including by shape, staining properties, temperature and oxygen requirements, pH tolerance, osmotic pressure tolerance, and cellular structure. Some of the key classification groups mentioned are cocci, bacilli, gram positive and gram negative bacteria, psychrophiles and thermophiles based on temperature, and obligate aerobes versus anaerobes based on oxygen needs. The document provides examples of bacteria that fall into each of the different classification groups.

1. CLASSIFICATION
OF BACTERIA
Maryam Zahra
Roll no. 5
2nd Prof.

2. CLASSIFICATION
BACTERIA
On the Basis of Shape
 On the Basis of Staining
 On the Basis of Action
 On the Basis of Oxygen Requirement
 On the Basis of pH
 On the Basis of Temperature
 On the Basis of Structure
 On the Basis of Osmotic Pressure

OF

3. ON THE BASIS OF SHAPE
 Cocci
(a) Dipplococci e.g Neisseria Gonorrhorea
(b) Streptococci e.g S.mutans
(c) Sarcina e.g Sarcina rosea
(d) Tetrad e.g Micrococcus luteus
(e) Staphylococci e.g Staphylococcus aureus..
 Baccilli
(a) Dipplobacilli e.g Clostridium
(b) Coccobacilli e.g Bordtella pertusis
 Vibrio e.g Vibrio cholerae
 Spiral e.g Spirillus
 Spirochete e.g Treponema pallidum

4. ON THE BASIS OF STAINING
 Gram
positive e.g Streptococci aureus
 Gram negative e.g Neisseria Gonorrhorea
ON THE BASIS OF TEMPERATURE
Psychrophiles e.g Bacillus psychrophilus
 Psychrotrophs e.g Listeria monocytogenes
 Mesophiles e.g E.coli
 Thermophiles e.g Bacillus

stearothermophiles
 Hyperthermophiles
e.g Sulpholobus

5. ON THE BASIS OF STRUCTURE
 Spore
former
(a) Centre spore former e.g Bacillus careus
(b) Terminal spore former e.g Clostridium tetani
(c) Subterminal spore former e.g Clostridium
subterminal
 Capsule
former
e.g Bacillus anthracis
 Flagella
(a) Monotrichous e.g Pseudomona auregenosa
(b) Amphitrichous e.g
(c) Lophotrichous e.g Pseudomona flouresence
(d) Peritrichous e.g Salmonella typhi
(e) Atrichous e.g spirochas

6. ON THE BASIS OF O2 REQUIREMENT
 Obligate
aerobes e.g Pseudomonas mycobacterium
 Facultative anaerobes e.g E.coli
 Aerotolerant anaerobes e.g streptococcus
pyrogene
 Obligate
anaerobes e.g Clostridium bacteriodes
 Microaerophiles e.g Campylobacter
ON THE BASIS OF pH
 Acidophiles
e.g Sulpholobus
 Neutrophiles
 Alkalophiles
e.g Escherichia
e.g Bacillus alkalophiles
ON THE BASIS OF OSMOTIC PRESSURE
 Osmotolerant
 Halophiles
e.g S.aureus
e.g Helicobacter pylori