UW Health CLinicals Streps Bench

Question 1

Normal flora of respiratory tract

Answer 1

Staph aureus, S.epidermidis, Haemophilus influenza and Neisseria meningitidis.

Question 2

Normal flora of the mouth

Answer 2

strep viridans, coag neg staph, peptostreptococcus and stomatococcus

Question 3

what test differentiates the microcaccacaea from gram positive streptococcaceae?

Answer 3

catalase

Question 4

What test(s) is/are used to differentiate micrococcus from staph coag neg?
What are the results for each?

Answer 4

modified oxidase,(+)-micrococcus

bacitracin, (s)-micrococcus

Question 5

what are 3 selective medias that can be used to selectively isolate staph aureus from heavily contaminated specimen?

Answer 5

CNA
PEA
Mannitol Salt auger

Question 6

what test is used to differentiated between coagulase negative staph?

Answer 6

Novobiocin (R)- Staph. sapro

Question 7

what species of Strep are beta hemolytic?

Answer 7

Strep agalactiae (group B), group C and Strep. pyogenes

Question 8

How do you differentiate between group B and group C Strep?

Answer 8

CAMP test (+)- Group B

Question 9

what species of Strep are alpha hemolytic?

Answer 9

Strep. pneumo and Strep Viridans

Question 10

how do you differentiate between the alpha hemolytic streps?

Answer 10

Viridans Strep. Optichin disk(R)