STREPTOCOCCUS

Question 1

Belong to the family Streptococcaceae

Answer 1

Streptococcus

Question 2

all are classified under LANCEFIELD CLASSIFICATION

Answer 2

viridans group
S. pneumoniae,

Question 3

used to classify an isolate serologically (Lancefield classification)

Answer 3

possess common C carbohydrate

Question 4

Basic Classification of Streptococci spp.

Answer 4

Academic/ Bergey’s
Smith and Brown
Lancefield

Question 5

Streptococcal classification based on temperature requirement

Answer 5

Academic/Bergey’s Classification

Question 6

ONLY GROWS ON 37 DEGREES
CELSIUS
S. pyogenes and Group C and G

Answer 6

Pyogenic Group

Question 7

Grows both at 45 and 37 degrees
Celsius;

Answer 7

S. mutans, S. mitis and S. salivarius, S. bovis, S.
anginosus

Question 8

Grows at 10 and 37 degrees
Celsius;
S. lactis - normal coagulation or souring of milk

Answer 8

Lactic Group

Question 9

Grows at 10, 45 and 37 degrees Celsius; part of normal flora of the GI tract

Answer 9

E. faecalis, E. faecium, E. durans, E.
avium

Question 10

Streptococcal classification based on hemolytic patterns

Answer 10

Smith and Brown Classification

Question 11

Shows PARTIAL/INCOMPLETЕ
blood cells around colonies.
HEMOLYSIS of red
Culture demonstrates a greenish or incomplete

S. pneumoniae (green)

Answer 11

Alpha hemolytic (a) streptocоссі:

Question 12

COMPLETE HEMOLYSIS of red blood cells around colonies.
Culture demonstrate clearing/ around the colony.

S. pyogenes and S. agalactiae

Answer 12

Beta hemolytic (B) streptocoссі:

Question 13

DOES NOT SHOW HEMOLYSIS of red blood cells
around colonies.
Red blood cells around the colonies are unaffected

S. bovis

Answer 13

Gamma hemolytic (y) streptococci: Non Hemolytic

Question 14

Classification is based on the extractable C carbohydrates found in the cell wall of streptococcus

Answer 14

Lancefield Classification (Antigen sero-grouping)

Question 15

Beta hemolytic
(B-hemolytic)

Answer 15

S. pyogenes
S. agalactiae
S. dysagalactiae
S. equi

Question 16

Alpha hemolytic
(a - hemolytic)
or
Gamma hemolytic
(y-hemolytic)

Answer 16

GROUP D
S. bovis/S. equinus
(Non-Enterococcus Group)

Question 17

a - hemolytic
B-hemolytic
Y- hemolytic

Answer 17

Enterococcі
(Former Streps)

Question 18

Pharyngitis, tonsillitis (strep - throat),
Scarlet fever, impetigo, cellulitis, wound infections, Erysipelas, AGN, ARF

Answer 18

Group A

Question 19

Neonatal infection (pneumonia, meningitis and bacteremia)

Answer 19

Group B

Question 20

Severe pharyngitis followed by bacteremia
** Opportunistic pathogen causing cellulitis, pneumonia and abscesses

Answer 20

Group C

Question 21

Endocarditis, UTI and wound infections

Answer 21

Group D