Question

Explain the epidemiological chain of transmission of this infection with a schematic diagram.

Answer 1

ANSWER :

1.Infectious agent :

• It is the microorganism that causes the disease.
• Example : Bacteria , virus, parasite etc

2.Reservoir :

• It is the source required for the pathogen to survive.
• Example : soil , water , person , animal etc

3.Portal of exit :

• It is the portal of exit required for the infectious agent to leave the reservoir or source.
• Example : If reservoir is person then portal of exit can be blood , secretions, saliva etc.

4.Means of transport :

• Direct transmission by close contact or direct physical contact.
• Indirect transmission by any vector.

5.Portal of entry :

• Infectious agent can enters the host by ingestion, penetration or inhalation.

6.Susceptible host :

• Strength of immune system of the host decides the severity or infection.
• Increased multiplication rate of the microorganism leads to severe infection.