specificity allows a certain group of organisms to [..] while [..] others
grow
inhibiting
sensitivity is regarding the [..], when it changes, and if it turns [..] with it
pH
color
does staphylococcus aureus have growth or no growth in the MSA plate?
MSA = mannitol salt agar plate
growth
staphylococcus aureus has aurea in the salt environment where it is hard to survive so it does have “aura”
since staphylococcus aureus does have growth in the MSA agar plate what color does it turn?
yellow
yellow aura = thing of for gold
MSA
since staphylococcus aureas has growth and is yellow, what does that mean?
grew in the mannitol salt agar plate and is yellow
- salt tolerant
- ferments mannitol
staphylococcus aureas has aura so it does grow in salt which is hard, and since it is yellow for golden aurea it ferments mannitol
MSA & MC
does staphylococcus epidermidis have growth or no growth in the MSA and MC agar plates?
- MSA = growth
- MC = no growth
epidermidis = skin = skin is salty, not gram -
MSA
since staphylococcus epidermidis grows in salty environments, MSA, what color does it become ?
pink
staphylococcus epidermidis = skin = skin is salty
since staphylococcus epidermidis does not grow in MacConkey agar plates, what color is it?
N/A
since staphylococcus epidermidis grows in MSA plates and is pink, what is the interpretation ?
- salt tolerant
- no mannitol fermentation (since it is not yellow)
think of pink skin for the color pink of the organism
Since staphylococcus epidermidis does not grow on Mac Conkey plate and has no color change what does this interpret?
- gram positive
- crystal violet & bile salts inhibit growth
does streptococcus pyogenes have growth or no growth in the MSA plate?
no growth
since streptococcus pyogenes has no growth in the MSA plate, what is the color
N/A
since streptococcus pyogenes have no growth in the MSA plate and no color indication, what is the interpretation
not salt tolerant
does escherichia coli have growth or no growth in the MC agar plate?
growth
mac CONKEY = mac DONKEY = donkeys poop = escherichia coli
since escherichia coli does grow on MC plates, what color does it become
hot pink
since escherichia coli grows in the Mac Conkey plate and is hot pink, what is the interpretation
- gram negative
- can ferment lactose (colliform)
does pseudomonas aeruginosa have growth or no growth in the MC plate?
growth
since pseudomonas aeruginosa has growth in the MC agar plate, what color does it become?
greenish yellow
since the pseudomonas aeruginosa does have growth in the MC plate and is greenish yellow, what does this interpret?
- gram negative
- does not ferment lactose
color changes based on [..] indicator
pH
aerotolerance is the organisms ability to tolerate [..]
oxygen
aerotolerance
what does obligate aerobe mean
requires oxygen to survive
growth on top of flask since its where most oxygen is at
what does obligate anaerobe mean
requires anoxygenic environemnts to survive
growth at botto of flask since its where least oxygen is located
what does facilitative anaerobes mean
prefer oxygen, but can survive without it
most growth on top but some scatted throughout rest of liquid
