Exam 15: Streptococcus, Enterococcus, and Other Catalase-Negative, Gram-Positive Cocci

A young girl goes to her doctor's office with a fever, headache, and a sore throat.The mother states the girl has a fever of 38.8° C (102° F).What test should the physician perform?

What organism on sheep blood agar (SBA) has colonies that are small and transparent, surrounded by a wide zone of b-hemolysis?

What is the drug of choice to treat group A streptococci when the patient cannot tolerate penicillin?

What is the drug of choice to treat Streptococcus pneumoniae?

Where are the viridans streptococci constituents of the normal flora?

An 80-year-old woman is admitted from a nursing home where she has been sick with a cough and fever for 2 days.She is coughing up thick, rust-colored sputum.The physician prescribed penicillin, but she is not getting any better.What is her most probable diagnosis?

Streptococcus agalactiae is a significant cause of:

Streptokinase is an enzyme produced by group A streptococci that:

Common schemes to classify streptococci include all the following except:

What is the cell wall made of in streptococci and enterococci?

What is one of the most common diseases caused by streptococci?

All of the following are additional virulence factors associated with group A Streptococcus except:

What test can be used to differentiate Streptococcus agalactiae from other b-hemolytic streptococci?

One major virulence factor for Streptococcus pneumoniae is:

What test differentiates staphylococci from streptococci?

What is the inexpensive test used to presumptively identify Streptococcus pyogenes?

What is the name of the test presumptively used to identify group B streptococci?