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8 Cards in this Set
- Front
- Back
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Test color gm - vs gm + |
Gm + is purple
Gm - is red |
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*Structure of Cell wall
+ chemical structure is crosslink of what?
What part of wall is good target for antibiotics |
Outermost component of bacteria Distinguish gm + from gm - Contains peptidoglycan
Crosslink of sugar (glycan) and amino acids (peptide)
b 1-4, N-acetylglucosamine and N-acetylmuramic
Transpeptidases crosslink peptidoglycan, and inhibited by penicillin |
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*Difference in gm + and gm - cell wall? |
Gm + is very thick wall, LTA, WTA, has MORE CROSSLINKING, susceptible to lysozyme
Gm - is thin wall, LPS, RESISTANT to lysozyme, less susceptible to antibiotics, has outer membrane with PORINS |
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LPS is in gm - or gm + only?
How resistant to antibiotics?
3 parts of structure? |
Gm -
Resistant to antibiotics from hydrophobic permeability barrier
O antigen, Core, Lipid A |
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** Antigenic differences define serotypes.
Protects bacteria from phagocytosis*** |
Capsule |
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**Antigenic (H antigen) and recognized by Toll-like receptors
hint- Endows bacteria with motility |
Flagella |
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**Mediate specific binding to host cells and other bacteria
Specific adhesin located at its top
hint- hair like structures
What type of this cell is involved in interactions between bacteria for genetic exchange? |
Fimbriae (aka Pili)
F-pili (sex pili) involved in those interactions |
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**Resistant to heat, cold, drying, and chemicals
Formed in response to environmental stress
Vegetative state returns when nutrients return |
Spores (Endospores) |
