LAB 2 - Streptococcus, Enterococcus & "Strep-like" bacteria

Question 1

pharyngitis, TSS, scarlet fever

Answer 1

S. pyogenes
a pathogen in any amount

Question 2

neonatal infection

Answer 2

S. agalactiae

Question 3

not quite as serious pharyngitis

Answer 3

Group C and G

Question 4

respiratory infections, meningitis, septicemia

Answer 4

S. pneumoniae

Question 5

cause of bacteiral endocarditis

Answer 5

viridans group Strep

Question 6

bacteremia, meningitis, prosthetic valve endocarditis; carcinoma of colon

Answer 6

S. bovis group or Group D

Question 7

frequent cause of UTI

Answer 7

Enterococci

Question 8

S. anginosus

Answer 8

• included in viridans; most common isolate
• alpha, beta, or no hem
• sweet, butterscotch odor
• abscess of oropharynx, brain, peritoneal cavity, abscess associated bacteremia

Question 9

Aerococcus urinae

Answer 9

• looks alpha but workup as y hem
• urine pathogen

Question 10

Abiotrophia

Answer 10

• satellites, vit B6 dependent, symbiotic Strep
• important to smear all satellites

Question 11

GAS other disease conditions

Answer 11

• after bacterial pharyngitis = post-infection sequelae
  > acute rheumatic fever
  > acute glomerulonephritis
• erysipelas, cellulitis, pyoderma
• Septicemia
• TSS

Question 12

the most common cause of community acquired bacterial pneumonia

Answer 12

S. pneumoniae
- rusty sputum due to blood-tinged aspirations
- vaccines containing most common capsular serotypes recommended for elderly and immunocomp patients

Question 13

viridans group Strep

Answer 13

• normal inhabitants of mouth and URT
• dental plaque, wound infections, brain abscesses
• subacute bacterial endocarditis in patients w damaged or artificial heart valves (after a dental procedure)

Question 14

GDS septicemia is associared with

Answer 14

colon cancer

Question 15

Enterococci resistant to…

Answer 15

beta-lactams and aminoglycosides

Question 16

extracellular antigens of GAS

Answer 16

• streotplysin O
• DNase B