5. How Microbes Cause Disease

Question 1

Pathogenicity:

Answer 1

The quality of producing or the ability to produce pathological changes or disease.

Question 2

Virulence:

Answer 2

The degree of pathogenicity of a microorganism.. it is measured experimentally by the medial lethal does (LD50) or median infective dose (ID50)

Question 3

Difference between virulence and pathogenicity

Answer 3

The ability of a fungus to cause disease is termed pathogenicity, and the ability to worsen the disease is called virulence.

Question 4

Endotoxins found in:

Answer 4

Cell wall of ALL Gram -ve bacteria (LPS)
- indirect action on immune system

Question 5

Exotoxins are produced by:

Answer 5

SOME gram +ve/-ve bacteria
- direct action on host tissues