-
Peptidoglycan?
- Gives rigid support, protects against osmotic
- pressure.
- Sugar backbone with peptide side chains crosslinked
- by transpeptidase.
-
Cell wall/cell membrane (gram positives)?
- Major surface antigen.
- Pe ptidoglycan for support. Lipote ichoic acid
- induces T F and IL-l.
-
Outer membrane (gram negatives)?
- Site of endotoxin (lipopolys accharide [LPS ]);major surface antigen.
- Lipid A induces TNF and IL-l;
- 0 polysaccharide is the antigen.
-
Plasma membrane?
- Site of oxidative and transport enzymes.
- Lipoprotein bilayer.
-
Ribosome?
- Protein synthesis
- 50S and 30S subunits.
-
Periplasm?
- Space between the cy topl asmic membrane and
- outer membrane in gram-negative bacteria
- Contains many hydrolytic enzymes, including
- B-lactamases
-
Capsule?
- Protects against phagocytosis
- Polysac charide (except Bacillus anthracis, which
- conta ins D-glutamate) .
-
Pilus/fimbria?
- Mediate adherence of bacteria to cell surface ;
- sex pilus for ms attachment between 2 bacteria
- during conjugation.
- Glycoprotein.
-
-
Spore?
- Resistant to dehydration, heat, and chemicals.
- Kerati n-like coat; dipicoli nic acid ;
- peptidoglycan.
-
Plasmid?
- Contains a variety of genes for antibiotic
- resistance, enzymes, and toxins.
- DNA.
-
Glycocalyx?
- Mediates adherence to surfaces, especially
- fore ign surfaces (e.g., indwelling catheters).
- Polysaccharide.
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