Bacteriology: Shapes, Features, Names and Types Flashcards
What names do we use when talking about bacteria?
genus and species
What bacteria has both an inner and outer membrane?
gram -
In which phase in bacterial growth does sporulation begin?
stationary phase
What is a virulence factor?
anything that allows for bacteria to grow/colonize in a particular place
ex: motility of bacteria to move through mucus layer to be able to colonize
Rather than size, what does bacteria differentiate between other organisms?
lacking organelles (including nucleus)
- also contains peptidoglycan
What’s a strain of bacteria?
anytime you isolate a colony of species of bacteria
What is the shape of cocci?
circular/spherical
What is a cluster of cocci?
staphylococci
What is a chain of cocci?
streptococci
What is a curved rod called?
vibrio
What is the primary characteristic of classification of bacteria?
gram stain
What color is gram - and gram +?
gram - is pink
gram + is purple
If forgot to put ethanol stem in a gram stain, what would happen?
everything would be purple because ethanol is the decolorizer
What is serology?
Surface antigen tests to check the level for specific antibodies
What is PCR?
DNA sequencing
What is the best way to compare bacteria by using what specific region?
DNA sequencing the 16S ribosome rRNA
What does it mean if bacteria is 97% the same in the 16S ribosome RNA?
same species
If in the same strain, do you have to use the 16S ribosome RNA?
no, can use group of sequence
What is the classification system for organisms in order?
Domain, Kingdom, Phylum, Class, Order Family, Genus, Species
What do we care about for the classification of bacteria?
Genus and Species
