Laboratoires

Question 1

Nutrient agar

Answer 1

permissive medium

aerobic plate count

Question 2

AIA

Answer 2

Actinomycetes selective

Question 3

Sabouraud

Answer 3

fungus (selective)

Question 4

Azo

Answer 4

Azotobacter (selective, no nitrogen source)

Question 5

KEA

Answer 5

Enterococci, esculin degraders turns the medium black

Question 6

Endo

Answer 6

Coliforms, lactose fermenters turn red

Question 7

EMB

Answer 7

Coliforms, lactose fermenters: blue-black

Question 8

mFC

Answer 8

Coliforms, lactose fermenters: blue

Question 9

Endo, EMB, mFc

Answer 9

Coliforms, lactose fermenters

Question 10

RCAF

Answer 10

Propionibacterium pink or buff colored colonies

Question 11

4S

Answer 11

Staphylococcus black colonies plus white precipitate: areus

Question 12

Snyder agar

Answer 12

production of lactic acid : yellow

Question 13

3 main groups of microorganisms in soil

Answer 13

1 bacteria
2 actinomycete
3 funfi

Question 14

Nessler s reagent test for…

color…

Answer 14

presence of ammonia
turns yellow-brown
the darker the color, the more ammonia

Question 15

Azotobacter vinelandii : aerobe or anaerobe

Answer 15

aerobe

Question 16

Clostridium spp. : aerobe or anaerobe

Answer 16

anaerobe

Question 17

Describe Clostridia (3)

Answer 17

1- medium-sized
2- Gram positive
3- rods with central to sub-terminal endospores

Question 18

Susceptibility to dental caries

what test

Answer 18

Snyder

Question 19

propionibacteria : aerobe, anaerobe, fac aerobe… ?

Answer 19

aerotolerant anaerobe

Question 20

propionibacteria inhabit what part of your skin

Answer 20

hair canals

Question 21

micrococci aerobe or anaerobe

Answer 21

aerobe

Question 22

RCAF

how does P. acnes looks like

Answer 22

buff-coloured colonies

Question 23

RCAF

how does P.avidum looks like

Answer 23

pink and mucoid

Question 24

RCAF

how does P. granulosum looks like

Answer 24

pink and dry

Question 25

what organisms can be dangerous if you are a carrier and you work in a hospital

Answer 25

S. aureus

Question 26

4 s agar to determine …

Answer 26

if you are a staph carrier

Question 27

positive S. aureus

what color

Answer 27

Blue granules

Question 28

For which test you had to chew parafilm

Answer 28

Snyder

Question 29

major milk borne disease (3)

Answer 29

1- tuberculosis
2- brucellosis
3- typhoid

Question 30

What is flash pasteurization

Answer 30

heat to 71 C

15 seconds

Question 31

nitrite prevents growth of

Answer 31

C. botulinum

Question 32

TGEA

Answer 32

aerobic count plates

Question 33

EMB definition

Answer 33

Levine Eosin Methylene Blue agar

Question 34

KEA definition

Answer 34

Kanamycin Esculin Azide agar

Question 35

4S definition

Answer 35

Single step Selection for Staphylococci