Streptococcus

Question 1

Streptococcus pyogenes

Answer 1

1. Cause: Scarlet Fever
   - - Cytotoxins cause vasodilation that results in the characteristic rash
2. Virulence: due to Cell wall – M protein (both heat and acid resistant)
   - - Found in both the cell surface and fimbriae
3. S. pyogenes produce streptokinase,
4. Produce 3 kinds of cytotoxins: designated A, B and C (erythrogenic toxins damage the plasma membranes of blood capillaries under the skin and produce a red skin rash.

Question 2

Streptococcus pneumoniae

Answer 2

1. Cause: pneumonia

2. Virulence: due to capsule

Question 3

Streptococcus pneumoniae

1. Disease
2. Gram property
3. Virulence

Answer 3

1. Cause: pneumococcal meningitis; otitis media;
2. Gram (+) diplococcus; Common nasal microbiota
3. Capsule