Lab 13 Coagulase and Kirby Bauer

Pathogenic Staphylococcus aureus is

• coagulase positive

• coagulase positive

• Gram negative

• Catalase negative

Rabbit plasma is used in what differential test?

• Kirby Bauer test

• catalase test

• Indole test

• coagulase test

What is the most important test  that can distinguish Staphylococcus aureus from other staphylococci?

• Catalase

• Coagulase

• Motility

• Gram stain

The coagulase test would only be performed on

• Gram negative bacteria

• Gram positive, catalase negative cocci

• Gram positive, catalase positive cocci

• Streptococci

The Kirby Bauer test analyzes

• disinfectant effectiveness

• blood hemolysis

• antibiotic sensitivity of bacterial strains

• if people are resistant to antibiotics

When the Kirby Bauer test is performed the plate is inoculated

• with a lawn of bacteria

• in a quadrant streak pattern

• and incubated overnight before antibiotics are added

In the Kirby Bauer test, we measure the

• diameter of the zone of inhibition

• radius of the zone of inhibition

• minimum inhibitory concentration

• time it takes for the bacteria to be killed by the antibiotic

If the results of the Kirby Bauer test line up with the "Sensitive" category for that antibiotic, that means that

• the antibiotic would not effectively treat that bacterial strain

• that antibiotic would be a good choice for treatment

• it is MRSA

• the person is allergic to that antibiotic

When analyzing the Kirby Bauer test,

• the antibiotic with the largest zone of inhibition is the best antibiotic to use

• standardized charts help us interpret the ZOI sizes

• we add hydrogen peroxide

• we look for color changes