bacteria 12-13

Question 1

is streptococcus gram neg or pos

Answer 1

gram pos
(think 2nd t is plus sign)

Question 2

strepto means

Answer 2

chain

Question 3

pus forming

Answer 3

streptococcus pyogenes

Question 4

_____on blood agar plates causes clearing at and around coloines in streptococcus pyogenes

Answer 4

b-hemolysis

Question 5

____shows greening due to partial lysis of erythrocytes in the S.mitis and S.pneumoniae

Answer 5

a-hemolysis

Question 6

regarding streptococcal classification, there are two B-hemolysis groups=

and what bacteria belongs to those groups=

and which deals with strep throat testing

Answer 6

Group A: s. pyogenes
Group B: s. galactiae

group A

Question 7

what are the virulence factors (we need to know) of streptococcal

Answer 7

1. M protein
2. capsule
3. G protein
4. C5a peptidase (in group A)
5. cytotoxins:::streptolysins S, O
6. superantigens

Question 8

what does M protein do in streptococcal

Answer 8

1. so abundant that forms fuzzy surface
2. binds keratinocytes
3. binds fibrinogen
4. anti-complement action through Factor H and capsular C3 peptides destroy C3b comp. opsonization

Question 9

what virulence factor of streptococcal binds Fc of IgG preventing phagocytosis

Answer 9

G protein

Question 10

this virulence factor os streptococcal disrupts plasma membranes by lysis of erythrocytes

Answer 10

streptolysins S and O

Question 11

this virulence factor of streptococcal overrides the specificity of the t-cell response (creates large areas of inflammation)

Answer 11

superantigens

Question 12

this disease is a streptococcus pyogenes and the virluence factor of it is a superantigen SPE

Answer 12

scarlet fever

Question 13

what are other results of pyrogenics SPE’s

Answer 13

pyoderma (skin infections)
erysipelas (red blisters on skin)

Question 14

acute pharyngitis= strep throat.

what type of hypersensitivity is
1. glomerulonephritis
2. rheumatic fever (myocarditis and arthritis

Answer 14

1. type III
2. Type II

Question 15

what are the disease potential for streptococcus pyogenes

Answer 15

strep throat
scarlet fever
rheumatic fever
flesh-eating fascitis
glomerulonephritis

Question 16

this bacteria is group B, B-hemolytic

normally in lower gastrointestinal tract
causes pneumonia in neonates (does not cause disease in healthy people) and bacteroemia and meningitis
can also cause urinary infections in pregnant women

Answer 16

streptococcus agalactiae

Question 17

this bacteria used to be group D aka a-hemolytic

normal part of gastrointestinal flora!

high, multiple antibiotic resistance!!

found in eldery, those in hospital long and those with antibiotic resistance

Answer 17

enteroccus faecalis

Question 18

this is a a-hemolytic

only encapsulated strains are virulent
inhalated and colonize in alveoli

Answer 18

streptococcus pneumoniae

Question 19

which pneumonia has vaccines and which do not

Answer 19

pneumoccocal pneumonia capsular has vaccines available (aka streptoccocus pneumoniae)

klebsiella and mycoplasmal DO NOT have vaccines

Question 20

what are the virulence factors (that we need to know) with S. pneumoniae

Answer 20

a-hemolysis
capsule
IgA protease

Question 21

this bacteria is common in children and