lab plates

Question 1

beta hemolytic

Answer 1

halo (colorless/clear)

Question 2

alpha hemolytic

Answer 2

partial lysis (green/brown)

Question 3

non hemolytic

Answer 3

no lysis

Question 4

mac (macConkey agar)

Answer 4

selective (bile salts) and differential (lactose)

Question 5

mac + or -

Answer 5

+ –> lactose fermenter (turns purple)
- –> non lactose fermenter (turns clear)

Question 6

bap (blood agar plate)

Answer 6

differential (5% sheep red blood cells) (hemolysis)

Question 7

mh (mueller hinton)

Answer 7

neither selective or differential (peptones/sodium chloride)

Question 8

msa (mannitol salt agar)

Answer 8

selective (7.5% sodium chloride)
differential (1% mannitol)

Question 9

msa + or -

Answer 9

+ –> yellow fermentation
- –> red (no fermentation)

Question 10

cna (columbia colistin nalidixic acid)

Answer 10

selective (colistin/nalidixic acid)
differential (sheep blood

Question 11

hea

Answer 11

selective: bile salts
differential: sodium thiosulfate, ferric ammonium citrate, carbs (lactose, sucrose)