j----_. - New York Civil Liberties Union

Mahopac 387
( Teacher Notes on Lesson 9
c
Background
Teacher Vocabulary
This lesson contains two diagrams of the "Chain of Infection." One is
blank and is meant to serve as a generic model. The other is filled in
to illustrate the chain of infection for measles. The "Chain of Infection"
is designed to help you and your students to recognize how a
disease is spread and how the spread of disease can be stopped by
breaking the chain at various points.
In the instance of measles, the chain can be broken by the infected
person by:
• covering the nose and mouth when sneezing or coughing.
It can be broken by the noninfected
• avoiding contact with secretions
• immunization.
person by:
The focus of this lesson is twofold; a person is responsible for:
• breaking the chain of infection in order not to spread a disease
to others
• breaking the chain of infection in order not to catch the disease
from others.
Host - Any person in whom an infectious agent can live and multiply.
Immunization - Method of producing resistance to an infectious
disease, usually by vaccination or inoculation.
Infectious agent - An organism (virus, bacteria, etc.) that is capable
of producing infection or infectious disease.
Method of entry - Manner in which organisms enter the host's
body.
Method of escape - Manner in which organisms leave the host's
body.
Mode of transmission - Manner in which an infectious agent is
transmitted from one person to another.
Organism
- Any living thing, such as a virus, bacteria, etc.
Susceptible host - A person not possessing sufficient resistance
against a particular organism to prevent contracting the infection
when exposed to the organism.
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