Learning Task 3: Complete the Chain letter below by supplying the missing words that can be found on the box below.
Write the word on the space provided that will best suit the statement in the letter.
Reservoir
Portal of Exit
Susceptible Host
Mode of Transmission
Portal of Entry
Pathogen
The Chain Letter
is a disease-causing organism which
includes bacteria, virus, parasitic worm, protozoa, and fungi and lives
in the
which can be a living or non-living object. In
order to be transmitted, the pathogen leaves the reservoir through the
Examples include the mouth, nose, anus, and other body openings.
The pathogen is then passed through a direct or indirect
from one host to the next host. It is transmitted
through a living vector like a mosquito or flea. Some diseases like
malaria have complicated life cycles involving more than one species.
Some are transmitted by respiratory droplets, while others are through
blood contact, semen, or other secretions.
The organism enters the body through the
such
as the nose, skin, or mouth. The
is a person with
low immunity to disease. This includes the very old and the immune
suppressed​