Bacte Lec - Quiz 2

Question 1

• media supplemented with serum or sugar to prevent osmotic pressure
• capable of reverting to normal form (Residual) peptidoglycan

Answer 1

L-forms

Question 2

– physical mordant in AF stain

Answer 2

Steam or heat

Question 3

chemical mordant present in carbolfuchsin

Answer 3

Phenol –

Question 4

2 Methods of Acid- Fast Staining

Answer 4

1. Ziehl-Neelsen method– hot, steaming for 5 min

2. Kinyoun method – cold, more than 60 min

Question 5

may be a substitute for methylene blue as counterstain in AF Staining

Answer 5

Malachite green

Question 6

– placed on top of the smear before flooding with carbolfuchsin

Answer 6

Filter paper

Question 7

function of filter paper

Answer 7

-prevents rapid evaporation of dye (dye is not allowed to dry)

Question 8

cells commonly found in clinical specimens because it is the first to react during a bacterial infection

Answer 8

Neutrophils –

Question 9

– round, spherical, shaped like berries or grapes

`

Answer 9

coccus

Question 10

identify species

(flattened on one side like a coffee bean)

Answer 10

Neisseria gonorrhoea

Question 11

multiple planes and form grapelike clusters or broad sheets

Answer 11

staphylococci

Question 12

2 planes remain in groups of 4 (ex. Micrococcus tetragena)

Answer 12

• tetrads:

Question 13

3 planes and remain attached in cubelike groups of 8

Answer 13

• sarcinae

Question 14

example of species with sarcinae arrangement

Answer 14

Sarcina lutea

Question 15

remain in pairs after dividing

Answer 15

diplococci:

Question 16

example of species with diplococci arrangement

Answer 16

(Streptococcus pneumonia/Diplococcus pneumonia)

Question 17

type of cocci arrangement

divide and remain in chain like pattern

Answer 17

streptococci:

Question 18

-usually round but can be oval, elongated, flattened on one side

Answer 18

cocci

Question 19

example of tetrad

Answer 19

Micrococcus tetragena

Question 20

example of streptococci

Answer 20

streptococcus pyogenes

Question 21

Arrangements of bacilli

Answer 21

singly, chains, pairs

Question 22

Gram-positive long bacilli, a common cause of bacterial contamination in laboratories

Answer 22

Bacillus subtilis

Question 23

arrangement of bacillus

may align themselves side by side

Answer 23

palisading

Question 24

example of palisading

Answer 24

Corynebacteria or Corynebacterium diphtheria

Question 25

example of staphylococcus other than staphylococcus aureus

Answer 25

Staphylococcus hominis

Question 26

type of shape

oval and look so much like cocci

Answer 26

coccobacilli

Question 27

example of coccobacilli

Answer 27

Acinetobacter spp.
Acinetobacter baumannii
Bordetella pertussis

Question 28

example of vibrio

Answer 28

Vibrio cholerae

Question 29

Example of spirilla

Answer 29

Leptospira interrogans

Helicobacter pylori

Question 30

Example of spirochetes

Answer 30

Treponema pallidum

Question 31

shape and arrangement of bacteria is determined by

Answer 31

heredity

Question 32

genetically, most bacteria are (number of shapes)

Answer 32

monomorphic

Question 33

what can alter the shape of bacteria

Answer 33

number of environmental conditions

Question 34

bacteria is said to be ____ when it has many shapes

Answer 34

pleomorphic

Question 35

example of pleomorphic

Answer 35

Rhizobium and Corynebacterium

Question 36

bacteria which look like Chinese characters

Answer 36

Rhizobium and Corynebacterium

Question 37

size of bacteria may be measured using a_______

Answer 37

micrometer

Question 38

length of bacteria

Answer 38

2 to 8 um

Question 39

diameter of bacteria

Answer 39

0.2 to 2 um

Question 40

look like curved rods.

Answer 40

vibrios

Question 41

have a helical shape and fairly rigid bodies

Answer 41

spirilla

Question 42

have a helical shape and flexible bodies

Answer 42

spirochetes

Question 43

a genus of halophilic archaea, are rectangular or square and flat

Answer 43

Haloarcula

Question 44

star-shaped bacteria

Answer 44

Stella