This document discusses the chain of infection, which refers to the steps required for the transmission of a disease: 1) a pathogen, 2) a reservoir host where the pathogen lives, 3) a portal of exit where the pathogen leaves the host, 4) a mode of transmission through which the pathogen spreads to a new host, 5) a portal of entry through which the pathogen enters the new host, and 6) a susceptible host in which the pathogen can survive and reproduce. The document provides examples for each step and notes that understanding how infections spread can help prevent transmission. Students are assigned to create a poster about breaking or preventing the chain of infection.

1. Good afternoon class! 

2. Opening prayer

3. Attendance

5. The Chain of Infection

8. 1st - Pathogen
-any disease-causing
microorganism

10. 1. 2. 3.

11. 2nd - The Reservoir Host
-refers to any living or
nonliving thing in which the
pathogen may live.

12. Hosts that do not show any outward signs or
symptoms of a disease but are still capable
of transmitting the disease are known as
carriers.
What are “Carrier Hosts”

14. 3rd - The Portal of Exit
- Refers where the pathogen gets
our from the reservoir.
Examples: respiratory
secretions, blood
exposure, breaks in
skin

15. Sneezing is one
example of
portal of exit.
What are some
other examples
that you can
give?

16. 4th - The mode of
Transmission
-method by which the pathogen
gets from the reservoir to the
new host

19. 1. 2. 3.

22. 5th - The Portal of Entry
-route through which the
pathogen enters its new host

24. Respiratory System

25. Gastrointestinal System

26. Urinary & Reproductive Tracts

27. Breaks in Protective Skin Barrier

28. 6th - The Susceptible Host
-the organism that accepts the
pathogen
The support of pathogen life & its
reproduction depend on the degree
of the host’s resistance.

43. It is important to
understand what
causes an infection
and the various ways it
can be transmitted in
order to avoid it.

45. Activity in Health 3rd Quarter:
Make a poster on a oslo paper
about how to break or to prevent
the chain of infection.

46. Reminder
All the
activities
deadline are
on April 8,
2022 (Friday).