Infection

Question 1

What is the chain of infection?

Answer 1

1). Infectious agent =

• virus.
• bacteria.

2). Reservoir =

• human.
• animal.

3). Portal of exit =

• faeces.
• vomit.

4). Mode of transmission =

• airborne.
• ingestion.

5). Portal of entry =

• inhaling.
• ingestion.

6). Susceptible host =

• immunosuppressed.
• disrupted normal flora.

Question 2

Apply the chain of infection to chicken pox?

Answer 2

1) . Infectious agent =
- varicella zoster (virus).
2) . Reservoir =
- human.
3) . Portal of exit =

• cough.
• exudate from spots.

4). Mode of trancsmission =

• airborne.
• direct contact.

5). Portal of entry =

• inhalation.
• breakage of skin.

6) . Susceptible host =
- lack of antibodies t virus.

Question 3

Name some infectious agents?

Answer 3

1). Visues =

• Flu.
• Chickepox.
• Hep C.
• HIV.

2). Bacteria =

• Clostridium Difficile.
• TB.
• Meningitis.

3) . Protozoa =
- Malaria.

Question 4

What are communicable diseases?

Answer 4

Contagious between humans.

• e.g. chickenpox.

Question 5

What are non-communicable diseases?

Answer 5

Not contagious diseases.

• acquired directly from the environment.