1. Cytoplasmic (Cell) Membrane Located just inside the peptidoglycan layer. Phospholipid bilayer similar to eukaryotic membranes, but does not contain sterols (except Mycoplasma species). Functions: [...]
like a stiff “canvas sack” around the bacterial cell. maintains cell structure. is a permeability barrier to large molecules (like lysozyme) and hydrophobic molecules; also [...]
Structure Chemical Composition Function Essential Components Cell Wall Peptidoglycan Outer membrane of Gram- negative bacteria Surface fibers of [...]
Name Reason Alternative Microscopic Approach Mycobacteria (Ex. M. tuberculosis) Too much lipid in cell wall so dye cannot penetrate Acid-fast stain Treponema pallidum Too thin [...]
It is difficult to classify all bacteria into clear-cut categories. Various classification methods are used, depending in part, on the purpose. Nomenclature Bacteria are [...]
Property Prokaryotic Bacterial Cells Eukaryotic Human Cells DNA within a nuclear membrane No Yes Number of chromosomes 1 More than 1 Mechanism of Replication [...]
Learning Objectives: You should be able to: describe the major differences between eukaryotic and prokaryotic cells and explain why it is important to know the [...]
The study and diagnosis of infectious diseases is approached from an organ system perspective. Upper and Lower Respiratory Tracts Gastrointestinal Tract Urinary Tract Genital Tract [...]
A. Observations of “acquired immunity” to diseases and primitive vaccination practices contributed to our understanding of the immune response to infectious agents and the design [...]
Relative sizes of microorganisms: Protozoa > Red Blood cell > Yeast > Bacteria > Mycoplasma > Viruses Fungi 1. David Gruby (1841-1845) identified yeast infections [...]
