Unit 3: Bacterial Infections Of The Respiratory System

Question 1

Pharyngitis

Answer 1

Inflammation of the pharynx (throat)

Question 2

Erythema

Answer 2

Redness

Question 3

Exudate

Answer 3

Protein and cellular elements that oozes out of blood vessels due to increased permeability (WHITE PATCHES)

Question 4

Lymphadenopathy

Answer 4

Cervical lymph nodes

Question 5

How is strep throat spread?

Answer 5

Thru respiratory droplets

Question 6

What is Streptococcus pyogenes?

Question 7

Attachment virulence factor of Streptococcus pyogenes

Answer 7

Uses 2 proteins
1) M Protein
2) Protein F (fimbriae)

Question 8

Invasion virulence factor of streptococcus pyogenes

Answer 8

3 Enzymes
1) streptokinase =dissolves blood clots
2) Hyaluronidase = breaks down hyaluronic acid that joins host cells together
3) deoxyribonuclease = breaks up DNA from damaged host cells to make for easier passage thru body

Question 9

What type or hemolysis does Streptococcus pyogenes cause?

Answer 9

Beta hemolysis

Question 10

Scarlet Fever

Answer 10

Bright red rash & fever due to erythrogenic toxin made by some strains

Question 11

Rheumatic Fever

Answer 11

Damage to heart muscle occurs because M-Protein resembles heart muscles & host immune system attack heart muscles and heart valves

Question 12

Acute Glomerulonephritis

Answer 12

Antibodies (Ab) made by host complex w/ antigens (Ag) from S. Pyogenes - Ag-Ab complexes deposit in glomeruli of kidney leading to kidney damage