Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.
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Transcript of Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.
![Page 1: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/1.jpg)
Morphology and Structure
of Bacteria
![Page 2: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/2.jpg)
Size and shape
• Size
microscope
μm
• Shape
planktonic
biofilm
![Page 3: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/3.jpg)
Shape
• coccus
diplococcus streptococcus
tetrads staphylococcus
• bacillus
• spiral bacterium
vibrio
helicobacterium
![Page 4: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/4.jpg)
Structure
• Basic structure
cell wall, cellular membrane
cytoplasm,nucleoid
• Special structure
capsule,flagellum,pilus,spore
![Page 5: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/5.jpg)
G+ cell wall
• peptidoglycan
• Gram positive , G+
Peptidoglycan N-acetyl-glucosamine
N-acetylmuramic acid
Tetrapeptide side chain
Peptide cross-bridge
![Page 6: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/6.jpg)
G+ peptidoglycan
![Page 7: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/7.jpg)
Special component of G+ cell wall
• teichoic acid
wall teichoic acid
membrane teichoic acid ( lipoteichoic acid , LTA )
![Page 8: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/8.jpg)
G- cell wall
![Page 9: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/9.jpg)
G- cell wall
• peptidoglycan
• Gram negative , G-
peptidogycan N-acetyl-glucosamine
N-acetylmuramic acid
tetrapeptide side chain ) L-ala-D-glu-DAP-D-ala
![Page 10: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/10.jpg)
Special component of G- cell wall
• outer membrane
lipoprotein
lipid-bilayer
lipopolysaccharide , LPS
lipid A
core
O antigen
![Page 11: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/11.jpg)
G- cell wall
•
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functions
• Gives the bacterial shape and prevents osmotic lysis
• Transports materials inside and outside of bacterium• Possesses antigenic specificity• Provides many pathogenic properties
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L form
• Definitionbacteria that their peptidoglycan is destroyed or lost by various factors but they can survive under highly osmotic environment
• Grow only in high solute concentration• Colony is like fried-eggs.• accomplished through the use of the enzyme lysozyme• Type
– Protoplast: G+ bacteria
– Spheroplast: G- bacteria
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cell membrane
• active transport
• respiratory chain component
• biosynthesis
• excretion
![Page 15: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/15.jpg)
cell membrane
• penicillin-binding protein ( PBP )• type III secretion system
• two-component signal transduction
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Important protein
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Important protein
![Page 18: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/18.jpg)
cytoplasm
• ribosome
• plasmid
• mesosome
• cytoplasm granule
( inclusion )
![Page 19: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/19.jpg)
nuclear material
• nucleoid
• chromosome
• Mostly single copy
• Few repeated sequence
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Special structure
• capsule
• flagellum
• pilus ( fimbriae )• spore
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capsule
![Page 22: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/22.jpg)
function
• anti-phagocytosis
( invasiveness )• adherence• Resistant to harmful materials
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flagella
![Page 24: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/24.jpg)
flagella
![Page 25: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/25.jpg)
function
• motility
• H antigen
• Pathogenesis
• classfication and identification
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pilus
• ordinary pili
adherence
pathogenecity
• sex pili
conjugation
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pilus
![Page 28: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/28.jpg)
spore
![Page 29: Morphology and Structure of Bacteria. Size and shape Size microscope μm Shape planktonic biofilm.](https://reader033.fdocuments.in/reader033/viewer/2022061509/5697c0191a28abf838cce80f/html5/thumbnails/29.jpg)
• nutritional depletion
• resting cell
• resistance
• identification
• Standard for sterilization
Function