Bacteria can be classified based on the location and number of flagella on their cell surface. There are six categories: atrichous bacteria have no flagella; monotrichous bacteria have a single flagellum at one end; cephalotrichous bacteria have several flagella at one end; amphitrichous bacteria have one flagellum at each end; peritrichous bacteria have flagella all over their body; and lophotrichous bacteria have two or more flagella at both poles. Flagella are hair-like protein structures that protrude from the cell wall and aid bacterial locomotion in liquids.

3. CLASSIFICATION OF BACTERIA
BASED ON FLAGELLA
Atrichous
Monotrichous
Cephalotrichous
Amphitrichous
Peritrichous
Lophotrichous

4. FLAGELLA :
Flagella are hair like structure that
protrude through the cell wall and are usually
exceeding the length of bacteria
Filament is made up of protein
namely FLAGELLIN
Swimming is one of locomotion of
bacteria in liquid movement which is aided
by flagella

5. • ATRICHOUS :
Bacteria without flagella
EXAMPLE : Xylella
• MONOTRICHOUS :
Bacteria with single flagella at
one end.
EXAMPLE :Xanthomonas sp

6. • CEPHALOTRICHOUS :
Bacteria with several flagella at
one end.
EXAMPLE: Pseudomonas fluorescens
• AMPHITRICHOUS :
Bacteria with one flagella at
both end.
EXAMPLE : Pseudomonas sp

7. • PERITRICHOUS :
Bacteria with flagella all over its
body .
EXAMPLE: Erwinia sp
• LOPHOTRICHOUS :
Two or more flagella at both the
poles of the bacterium
EXAMPLE : Spirillum types of
bacteria

8. TYPES OF FLAGELLA