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BACTERIOLOGY > Bacteriologic Reactions of Milk > Flashcards

Bacteriologic Reactions of Milk Flashcards

1
Q

Fermentation, Gas-production

A

Clostridium perfringens, Lactobacillus acidophilus

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2
Q

Stormy fermentation

A

Clostridium perfringens, Clostridium butyricum

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3
Q

Souring of milk

A

Streptococcus lactis

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4
Q

Clot formation

A

Lactobacillus acidophilus

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5
Q

Gas-forming, Casein hydrolysis

A

Coliform (enterobacteria)

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6
Q

Proteolysis on coagulated milk

A

Bacillus subtilis

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7
Q

Blue milk

A

Pseudomonas syncyanea

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8
Q

Blue-green milk, Peptonization (clearing)

A

Pseudomonas aeruginosa

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9
Q

Reduction and Peptonization of milk

A

Pseudomonas aeruginosa

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10
Q

Red milk

A

Serratia marcescens

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11
Q

Yellow milk

A

Flavobacterium synxanthum

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12
Q

Slimy/Ropy milk

A

Alcaligenes viscosus

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13
Q

Litmus milk test, Fermentation, Gas production

A

Clostridium perfringens

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14
Q

Litmus milk test, Clot formation, Acid production (Pink/Mauve color)

A

Lactobacillus acidophilus

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15
Q

Litmus milk test, Clearing, Peptonization (Watery fluid and shrunken insoluble blue clot)

A

Pseudomonas aeruginosa

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16
Q

Lactobacillus MRS Broth, (+) Growth, (+) Gas

A

Leuconostoc

17
Q

Lactobacillus MRS Broth, (+) Growth, (-) Gas

A

Lactobacillus

18
Q

Lactobacillus MRS Broth, Negative

A

Escherichia coli

19
Q

Aids in ID of some GP and GN bacilli

A

Litmus milk test

20
Q

Detects gas formers from glucose fermentation

A

Lactobacillus MRS broth

21
Q

Principle of Litmus milk test

A

Lactose fermentation → acid, Acid + casein → clot

22
Q

Principle of Lactobacillus MRS broth

A

Inhibitor of contaminating organisms: Na acetate & Ammonium citrate

23
Q

Medium for Litmus milk test

A

Litmus milk medium

24
Q

Medium for Lactobacillus MRS broth

A

MRS broth with vitamins

25
Q

Indicator for Litmus milk test

A

Litmus

26
Q

Indicator for Lactobacillus MRS broth

A

Durham tube

27
Q

Incubation for Lactobacillus MRS broth

A

35-37°C, 24-48 hours

28
Q

Incubation for Litmus milk test

A

35-37°C, Observe daily up to 7 days

BACTERIOLOGY (49 decks)

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