Test 4

Question 1

psychrophile

Answer 1

cold loving

Question 2

mesophile

Answer 2

body temp loving

Question 3

thermophile

Answer 3

heat loving

Question 4

what are the bacterial susceptibility and resistance levels

Answer 4

resistant
intermediate
sensitive

Question 5

catalase shows presence of

Answer 5

enzyme that converts toxic h202 to o2 and water

Question 6

catalase is seen in

Answer 6

aerobe and facultative anaerobes

Question 7

enterococcus is catalase

Answer 7

negative

Question 8

streptococcus is catalase

Answer 8

negative

Question 9

catalase positive

Answer 9

bubbling

Question 10

why is catalase test performed

Answer 10

differentiate between streptococci and staphylococci

Question 11

oxidase tests for presence of

Answer 11

cytochrome c oxidase in the ETC

Question 12

oxidase positive

Answer 12

blueish purple

Question 13

oxidase negative

Answer 13

no color or faint beige/pink

Question 14

oxidase differentiates

Answer 14

aerobic, gram-neg bacilli from facultative anaerobic, gram neg bacilli

Question 15

PEA is

Answer 15

phenylethyl alcohol agar

Question 16

PEA interferes with

Answer 16

gram neg bacteria preventing their growth - selects for gram pos

Question 17

PEA positive

Answer 17

growth - indicates gram positive

Question 18

Sheep’s blood agar

Answer 18

SBA
not selective
tests for hemolysis

Question 19

beta hemolysis

Answer 19

complete hemolysis

clear zones

Question 20

alpha hemolysis

Answer 20

incomplete hemolysis

greenish halo

Question 21

gamma hemolysis

Answer 21

no lysis

growth with no impact to agar

Question 22

mannitol salt agar

Answer 22

MSA
selective for halophiles because has high salt concentration
differentiates between those that do and don’t ferment mannitol

Question 23

msa often used for growth of

Answer 23

staphylococcus, micrococcus, enterococcus

Question 24

MSA with growth and red

Answer 24

halophile

does not ferment mannitol

Question 25

MSA with growth and yellow

Answer 25

halophile | ferments mannitol

Question 26

MSA with no growth

Answer 26

not halophile

Question 27

MSA differentiates between

Answer 27

S. aureus and S. epidermidis

Question 28

MacConkey agar

Answer 28

MAC agar selective for gram negative differential for lactose fermentation

Question 29

MAC agar with pink growth

Answer 29

gram negative | ferments lactose

Question 30

MAC agar with colorless growth

Answer 30

gram negative | does not ferment lactose

Question 31

no growth on MAC agar

Answer 31

gram positive

Question 32

eosin methylene blue agar

Answer 32

EMB agar selective for gram neg differential for fermentation of lactose and or sucrose

Question 33

EMB with green metallic

Answer 33

gram neg that ferments either sugar often E.coli

Question 34

EMB with colorless growth

Answer 34

gram neg | does not ferment lactose or sucrose

Question 35

coagulase test checks for

Answer 35

the formation of a clot in a tube of rabbit plasm indicating that the bacterium produces coagulase to convert fibrinogen into fibrin

Question 36

coagulase differentiates between

Answer 36

s. aureus from others

Question 37

latex agglutination

Answer 37

tests for specific antigens by mixing with latex bead coated with a specific antibody

Question 38

latex aggluntination positive

Answer 38

clumping

Question 39

enteropluri identifies

Answer 39

enterobacteriacea