Describe the structure of a standard virus
Describe the structure of a standard bacteria
What shapes and arrangements can bacteria come in?
Coccus/ cocci: circular shapes
Bacillus/ bacilli: rod shapes
Cocci can come in either chains or clusters
What is gram staining?
Gram staining is a form of bacterial testing that allows us to identify certain bacterial microorganisms.
Bacteria are either gram positive or gram negative.
Gram positive is blue.
Gram negative is red (these tend to be more dangerous) this is due to the presence of the endotoxin, lipopolysaccharide, which is highly toxic and encapsulates the bacteria.
What is the infection model?