Streptococcus pyogenes

S. pyogenes is a

• gram positive streptococcus bacterium

• gram negative streptococcus bacterium

• a fungus

• a protozoan

• gram positive staphylococcus bacterium

Which of the following diseases are caused by S. pyogenes?

• Pharyngitis

• Scarlet fever

• Toxic shock syndrome

• Rheumatic heart disease

• Lyme disease

Which of the following is not a virulence factor of S. pyogenes

• beta hemolysins

• M protein

• Antiphagocytic capsule

• Flagella

• Superantigens

A main sign of pharyngitis is

• white spots of inflammatory cells on throat walls

• sore throat

• Koplik's spots

• swollen salivary glands

• a bullseye rash

The only reservoir and host for S. pyogenes is humans.

• True

• False

The incubation period for pharyngitis is

• 24 hours

• 2-5 days

• 1-2 weeks

• 6-12 months

Rheumatic heart disease is caused by

• an immune cross reaction to S. pyogenes M protein

• direct damage of the heart valve by Streptolysins

• S. pyogenes infection of the heart

• S. pyogenes bacteria in the blood

S. pyogenes is part of the human microbiota and can cause opportunistic infections.

• True

• False

All S. pyogenes diseases can be treated with

• beta-lactam antibiotics

• acyclovir

• amantadine

• ethambutol

The best way to prevent S. pyogenes infections is

• hand washing

• preventative antibiotics

• wearing long sleeves clothing and pants

• avoiding sexual contact