AH and NH strep

Question 1

What causes alpha hemolysis?

Answer 1

H2O2 production => damages RBCs

Question 2

Bacteria normally found in soil, plants, water, food, other animals, GIT, oral cavity, skin

Answer 2

Enterococci

Question 3

Antimicrobials unsuitable for treating enterococcal infection due to intrinsic R

Answer 3

• Cephalosporins
• Clindamycin
• SxT

Question 4

Bacteria normally found in mouth, URT, GR, female genital tract, transient colonizer on skin?

Answer 4

Viridans group of streptococci

Question 5

Which small colony group may be alpha/beta/gamma and may group with ACFG or not?

Answer 5

S. anginosus

Question 6

S. pneumo colonizes the ________ and is a normal flora from a ______ swab

Answer 6

Nasopharynx; throat swab

Question 7

Synergistic therapy to treat serious enterococcal infection?

Answer 7

Cell wall active antimicrobial + aminoglycoside

Ampicillin/vancomycin + gentamicin

Question 8

Strep pneumo TxP and bile solubility expected results?

Answer 8

TxP = S
Bile = POS (soluble)

Question 9

3 of the most common infections due to S. pneumoniae?

Answer 9

• Pneumonia
• Conjunctivitis
• Otis media

Question 10

Significance of isolating S. bovis group from blood?

Answer 10

Indicates bacteremia, septicemia, endocarditis

Question 11

Healthy heart/valves infection caused by?

Answer 11

S. aureus septicemia

Question 12

Group D strep is also known as?

Answer 12

Streptococcus bovis group

Question 13

Prosthetic heart valves infection caused by?

Answer 13

CoNS septicemia in addition to S. aureus (biofilms)

Question 14

BEA+
PYR-
6.5% NaCl: NG

Answer 14

S. bovis

Question 15

Bacteria normally found in pharynx, GIT, urethra, vagina, cervix

Answer 15

S. agalactiae

Question 16

Why is high-level aminoglycoside testing included for AST in cases of serious enterococcal infections?

Answer 16

to predict the usefulness of synergistic combination treatment

Question 17

Damaged heart/valves and intermittent shedding infection caused by?

Answer 17

Viridans group SBE

Question 18

Group that may be AH to AH’ and gpc tetrads especially from broth

Answer 18

Aerococcus

Question 19

Bacteria normally found in nasopharynx and upper respiratory pathway colonizer

Answer 19

S. pneumoniae