Litmus milk test Flashcards
litmus milk test differentiates microorganisms based on various metabolic reactions whether the bacteria is capable of ___
- fermentation
- reduction
- clot formation
- digestion
- formation of gas
litmus pink used to grow?
lactic acid bacteria
pink color indicates
pink as a result of acid production
if too much acid is produced casein in the milk is __, solidifying the milk
coagulated
with some organisms, the curd ___ and whey is ___
curd = shrinks
whey = formed at the surface
straw colored resembling turbid serum is caused by __
casein hydrolyze
medium becomes colorless in the bottom of the tube indicates?
organism was able to reduce litmus
if the pH changes to acid, turning color pink, what you will record?
acid
pink, mauve indicates
acid
alkaline color indication
blue
purple indicates?
no changes
white indicates?
what you will record?
- there is reduction of the indicator
- decolorized
presence of clot (coagulation) in the milk is recorded as?
clot formation
dissolution of clot with clear, grayish, watery fluid, and a shrunken insoluble pink color is recorded as?
digestion
dissolution of clot and the color is blue is recorded as?
peptonization
QC sample organism for fermentation
Clostridium perfringens
c. perfringes produces __ fermentation
stormy fermentation due to intense gas production
QC sample organism for acid formation
Lactobacillus acidophilus
Lactobacillus acidophilus is for?
clot formation
peptonization sample organism
Pseudomonas aeruginosa
P. aeruginosa is for?
clearing
ATCC13124
C. perfringens
ATCC11506
L. acidophilus
ATCC27853
P. aeruginosa
peptonization color indication
straw colored
e. coli is associated with?
fermentation - acid production
klebsiella is associated with
acid production with the clot formation
p. aeruginosa is associated with
alkaline production
