Streptococci

Question 1

Complete disruption of erythrocytes

Answer 1

B-hemolysis

Question 2

Incomplete lysis of erythrocytes

Answer 2

A-hemolysis

Question 3

Non-hemolytic

Answer 3

Gamma hemolysis

Question 4

It contains group A antigen

Answer 4

Streptococcus pyogenes

Question 5

Susceptible to bacitracin

Answer 5

Streptococcus pyogenes

Question 6

It has a striking diplococcal appearance

Answer 6

Streptococcus pyogenes

Question 7

Most group A strains produces capsules that is composed of

Answer 7

Hyaluronic acid

Question 8

They impede phagocytosis

Answer 8

Streptococcus pyogenes

Question 9

Most pathogenic streptococci grow best at how many degrees celsius

Answer 9

37

Question 10

Seen with organisms that produces much M proteins and it is generally virulent

Answer 10

Matte colonies

Question 11

It has less M proteins which means less virulence

Answer 11

Glossy colonies

Question 12

It is a major virulence factor of group A Streptococcus pyogenes

Answer 12

M protein

Question 13

Has hair like projections of the Streptococcal cell wall

Answer 13

M protein

Question 14

This rapidly destroys M protein

Answer 14

T substance

Question 15

Permits differentiation of certain types of streptococci

Answer 15

T substance

Question 16

This makes up most of the streptococcal cell body

Answer 16

P substance

Question 17

Produced by many strains of group A B-hemolytic streptococci

Answer 17

Streptokinase

Question 18

Other term for Streptococcal deoxyribonuclease

Answer 18

Streptodornase

Question 19

It helps liquify exudates

Answer 19

Streptodornase

Question 20

Facilitates removal of pus and necrotic tissue

Answer 20

Streptodornase

Question 21

It splits hyaluronic acid

Answer 21

Hyaluronidase

Question 22

It is a spreading factor which aids in spreading infecting microorganism

Answer 22

Hyaluronidase

Question 23

Associates with streptococcal toxic shock syndrome

Answer 23

Pyrogenic exotoxins

Question 24

This is the most widely studied exotoxin

Answer 24

Exotoxin A

Question 25

Play a role in the organism’s ability to kill leukocytes

Answer 25

Diphosphorydine nucleotidase

Question 26

This is rapidly activated in the presence of oxygen

Answer 26

Streptolysin O

Question 27

This is elaborated in the presence of serum

Answer 27

Streptolysin S

Question 28

Also known as Streptococcal gangrene

Answer 28

Necrotizing fasciitis

Question 29

Most common infection due to betahemolytic S. pyogenes

Answer 29

Streptococcal sore throat

Question 30

This is part of normal vaginal flora in 5-25% of women

Answer 30

Streptococcus agalactiae

Question 31

This produce zones of hemolysis that are only slightly larger than the colonies

Answer 31

Streptococcus agalactiae

Question 32

It is a non-enterococcal group D streptococci

Answer 32

Streptococcus bovis

Question 33

This do not grow in 6.5% NaCl

Answer 33

Streptococcus bovis

Question 34

This is referred to as the S.milleri group

Answer 34

Streptococcus anginosus

Question 35

This produces a normal coagulation “souring” of milk

Answer 35

Group N

Question 36

Serioogic specificity of group-specific carbohydrate is determined by

Answer 36

Amino sugar

Question 37

These types are resistant to Streptococcus pyogenes

Answer 37

M type

Question 38

They are group b streptococci

Answer 38

Streptococcus agalactiae

Question 39

Massive brawny edema, raised lesion rapidly advancing margin of infection

Answer 39

Erysipelas

Question 40

This is called impetigo which is a local infection of superficial layers of the skin especially in children

Answer 40

Streptococcus pyoderma

Question 41

These diseases are not due to direct effect pf bacteria but due to a hypersensitivity response

Answer 41

Poststreptococcal diseases

Question 42

Most serious sequela od Streptococcus pyogenes leading damage to heart muscles and valves

Answer 42

Rheumatic fever

Question 43

Treatment for Streptococcus pyogenes

Answer 43

Penicillin G

Question 44

If patient is allergic to penicillin what is the alternative

Answer 44

Erythromycin

Question 45

What is the most dangerous source for the spread of Streptococcus pyogenes

Answer 45

Nasal discharges

Question 46

Known to hydrolyze sodium huppurate

Answer 46

Streptococcus agalactiae

Question 47

How do you detect Streptococci agalactiae

Answer 47

CAMP test (Christie, Atkins, Munch-Peterson)

Question 48

This is a non-hemolytic Streptococci Which is a PYR-negative and grow in the presence of bile & hydrolyze esculin

Answer 48

Streptococcus bovis

Question 49

They grow only under anaerobic or microaerophilic conditions

Answer 49

Peptostreptococcus

Question 50

Their pus exhibits a very foul odor

Answer 50

Peptostreptococcus

Question 51

They are gram-positive, lancet shaped diplococci

Answer 51

Streptococcus pneumoniae

Question 52

They are a-hemolytic on blood agar and they form small round colonies and dome shaped

Answer 52

Streptococcus pneumoniae

Question 53

Pneumococci is mixed with specific anti-polysaccharide serum which causes the capsule to swell making the organisms to agglutinate

Answer 53

Quellung reaction/capsular swelling test

Question 54

Pneumococci that are clinically important to adults

Answer 54

Types 1-8

Question 55

Pneumococci that are clinically important to children

Answer 55

Types 6,14,19&23

Question 56

This Streptococcus produce disease due to their ability to multiply in tissues

Answer 56

Streptococcus pneumoniae

Question 57

They are group D specific substance and they are more resistant to penicillin

Answer 57

Enterococci

Question 58

Most common cause of enterococcal infection

Answer 58

Enterococcus faecalis

Question 59

Most frequent causes of nosocomial infections

Answer 59

Enterococcus faecalis and Enterococcus facium