Bacterial Morphology

Question 1

Cocci that are clustered (Grape Like)

Answer 1

Staphylococci like Staphylococcus aureus

Question 2

Cocci that are in chains

Answer 2

Streptococci

 All of the Streptococcus spp

Question 3

Cocci in pairs (stuck together)

Answer 3

Diplococci like Neisseria gonorrhoeae

Question 4

Cocci in singles

Answer 4

Coccus

 Cocci always come in pairs, chains, and clusters so this
arrangement (Coccus) is quite rare

Question 5

Cocci in Tetrads (In fours)

Answer 5

Sarcinae

Question 6

ALL Cocci are Gram + except?

Answer 6

o Neisseria
o Moraxella
o Veillonella
o Megasphaera
o Acidaminococcus

Question 7

The only coccus that is Gram – compared to Gram + Staphylococcus, Streptococcus, etc…

Answer 7

Acidaminococcus

Question 8

Arrangements of Bacilli

Answer 8

 Singles
 Pairs
 Chains
 Palisades (Fence-Like)

Question 9

Appearances of Bacilli

Answer 9

 Short or Long
 Fusiform
 Comma-shaped

Question 10

ALL Bacilli are Gram - except?

Answer 10

o Arachnia
o Bacillus
o Bifidobacterium
o Clostridium
o Corynebacterium
o Erysiphelothrix
o Eubacterium
o Lactobacillus
o Listeria
o Propionibacterium
o Mycobacterium

Question 11

The most commonly observed species under the Bacilli classification

Answer 11

Bacillus is a Gram + Baciili

Question 12

This species are acid-fast bacilli as well as being Gram +

Answer 12

Mycobacterium Spp

Question 13

Its helical arrangement refers to singly arrangements
only

Answer 13

Spiral

Question 14

Arrangements of Spiral Bacteria

Answer 14

Comma
Spirilum
Spirochetes

Question 15

Spiral Bacteria that arranges in a Comma shape, which may also be classified atypical

Answer 15

Vibrio and Plesiomonas

Question 16

Spiral Bacteria that are Gram - and S shaped, and has not much curvature compared to that of Spirochetes

Answer 16

 Spirilum spp.
 Campylobacter jejuni
 Helicobacter pylori

Question 17

Spiral Bacteria that is helical and close to the appearance of DNA helix

Answer 17

 Leptospira interrogans
 Borella burgdorferi
 Treponema pallidum

Question 18

Bacteria morphologies usually not seen in clinical samples

Answer 18

Atypical Morphology

Question 19

The two atypical morphologies of bacteria

Answer 19

SQUARE-SHAPED
STAR-SHAPED

Question 20

They are Square-Shaped bacteria

Answer 20

Haloquadra spp

Question 21

They are Star-Shaped Bacteria

Answer 21

Stella spp

Question 22

Associate the type of bacteria with the shape given:

ROUND

Answer 22

COCCI

Question 23

Associate the type of bacteria with the shape given:

RODS

Answer 23

BACILLI

Question 24

Associate the type of bacteria with the shape given:

HELICAL

Answer 24

SPIRAL