BACTE LEC - Nonfermentative Gram Negative Flashcards Preview

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Flashcards in BACTE LEC - Nonfermentative Gram Negative Deck (35):
1

Oxidatively metabolize carbohydrates

Nonfermentative gram negative bacteria

2

Forms very weak acids

Nonfermentative gram negative bacteria

3

Nonsaccharolytic or nonoxidizers

Nonfermentative gram negative bacteria

4

Cannot utilize carbohydrates in the presence or absence of oxygen

Nonsaccharolytic or nonoxidizers

5

Rely on compounds other than carbohydrates

Nonsaccharolytic or nonoxidizers

6

spore forming activity of Nonfermentative gram negative bacteria

Nonsporeformers

7

are Nonfermentative gram negative bacteria aerobes, anaerobes, facultative, anaerobe, etc?

obligate aerobes

8

TSI Nonfermentative gram negative

K/K

9

indicator of contamination in hospitals

Nonfermentative gram negative bacteria

10

Nonfermentative gram negative bacteria are usual contaminants of ??? [4]

water, respiratory care equipment, water baths, sinks

11

Nonfermentative gram negative bacteria are what kind of pathogens

opportunistic

12

Nonfermentative gram negative bacteria grow better on ___ than on ___

grow better on BA than MAC

13

appearance of Nonfermentative gram negative bacteria on BA

dull gray colonies

14

Specific O-F Medium

Hugh and Leifson Medium

15

Carb concentration of O-F Medium

high at 1%

16

why high Carb concentration of O-F Medium

to enhance the production of acidic end products

17

peptone concentration of O-F Medium

low at 0.2%

18

why low peptone concentration of O-F Medium

to decrease the formation of oxidative products

19

what happens if there is a high peptone concentration

acid production will be high and is false + for fermentation

20

sugars in OF medium

glucose, maltose, xylose

21

indicator in OF medium

bromthymol blue

22

ph range of bromthymol blue

ph 6-9

23

positive result of OF medium

yellow in acidic pH

24

negative result of OF medium

blue in alkaline ph

25

reaction of oxidative organism in CT

Green or blue green

26

reaction of oxidative organism in OT

yellow

27

can only use carb when O2 is present

oxidative organism

28

reaction of fermentative organism in OT & CT

both yellow

29

common activity of facultative anaerobe

fermentative

30

aerobe but can survive w/o O2

Facultative anaerobe

31

purpose of zinc

for stability of result (?)

32

reduction of nitrates, meaning of red color

negative rxn [presence of NO3]

33

in reduction of nitrates, meaning of no change

No change indicates complete reduction of NO3
to N2 (positive reaction)

34

in modified indol test, indole is extracted by

xylene

35

reagent in modified indol test

PDAB [paradiethylaminobenzaldehyde]

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