Bacte Quiz

The symptoms of scarlet fever are due to

• Streptolysin

• Coagulase

• Erythrogenic toxin

• Alpha toxin

What pattern of hemolysis is exhibited by Group B streptococci?

• Gamma

• Alpha

• Beta

• Delta

A spherical, gram-positive coccus that is catalase-positive, non-motile, and is unable to produce acid from glucose anaerobically is best identified as member of the genus

• Micrococcus

• Streptococcus

• Staphylococcus

• Moraxella

Growth in 6.5% NaCl and hydrolysis of esculin are tests for the identification of

• Pneumococci

• Enterococci

• Staphylococci

• Viridans streptococci

Which of the following is primarily responsible for the beta hemolysis of group A streptococci when incubated anaerobically?

• streptolysin O

• streptolysin S

• CAMP factor

• streptodornase

Which of the following enzymes contribute to the virulence of S. aureus?

• urease and NADase

• catalase and oxidase

• hyaluronidase and beta-lactamase

• all of these

Bacitracin resistance test is used to differentiate

• S. aureus and coagulase (-) staphylococci

• micrococci and staphylococci

• enterococci and other streptococci

• Neisseria and Moraxella

The PYR hydrolysis test is a presumptive test for which streptococci?

• Group A streptococci and enterococci

• S. pneumoniae and group D non-enterococci

• Group A and non-A, non-B streptococci

• Group B and viridans streptococci

The Schultz-Charlton phenomenon refers to a laboratory test for suspected cases of

• pneumonia

• scarlet fever

• diphtheria

• erysipelas

Which test distinguishes pneumococci from other streptococci?

• bile solubility

• esculin hydrolysis

• bile tolerance

• all of these