MDL 251 Exam 2 - Tests for Bacteria

Question 1

What microorganisms are catalase positive?

Answer 1

Staphylococci & Micrococci

Question 2

What microorganism(s) are coagulase positive?

Answer 2

S. Aureus

Question 3

What organism is microdase positive?

Answer 3

Micrococcus sp.

Question 4

Which organism is novobiocin resistant?

Answer 4

S. saprophyticus

Question 5

Optochin is used to test which hemolytic group?

Answer 5

alpha

Question 6

CAMP tests which hemolytic group?

Answer 6

beta

Question 7

Lancefield groups are used to categorize ______ organisms?

Answer 7

beta-hemolytic

Question 8

Which microorganisms are positive for bile esculin and for 6.5% NaCl tests?

Answer 8

Enterococci

Question 9

What organism is confirmed with positive Optochin and positive Bile Solubility tests?

Answer 9

S. pneumoniae

Question 10

A positive CAMP test confirms which organism?

Answer 10

S. agalactiae

Question 11

Group D Streptococci are ____ for Bile Esculin and ____ for 6.5% NaCl?

Answer 11

+ Bile Esculin, - 6.5% NaCl

Question 12

A positive PYR test means which organisms may be present?

Answer 12

Group A Streptococci and/or Enterococci. S. lugdunensis may also be present.