2. In a one page paper, use the chain of infection to outline three different means for
preventing the spread of HIV.
Grading Criteria
Description of HIV
Possible
Points
Criteria Description
5 1) HIV is a relatively fragile virus.
2) It is not spread by casual
contact.
100%
Response
contains
four of the
five items
67%
33%
0%
Response
contains
three of the
five items
Response
contains at
least two
of the
items
Response
contains
none of
the items
3
2
Points
Earned
0
3) It is not easy to "catch"; it must
be acquired.
4) When HIV is exposed to air and
room temperatures it generally
does not survive.
5) Survival of these viruses outside
the human body, much depends on
environmental factors such as
heat, cold, exposure to oxygen,
etc.).
Description of the
Chain of Infection
5 The Chain of Infection provides:
1) A model for understanding
2) Demonstrates how any infection
is spread.
2) States that when any one of the
elements of the model are missing
the infectious agents stops
spreading.
Identification of the
components of the
Chain of Infection
5
Contains all Contains
three
two of the
elements
elements
5
Contains all
5 1. The pathogenic
six elements
microorganism is the microorganism that causes infection
such as bacteria, viruses, fungi and
parasites.
2. The reservoir is the place where
micro-organisms live, such as in
humans and animals, in soils, food,
plants, air or water. The reservoir
must meet the needs of the
pathogen in order for the pathogen
to survive and multiply.
0
Contains Contains
one of the none of
elements the
elements
3
Contains
four of the
six
elements
2
Contains
two of the
six
elements
0
0
Contains
one or
none of
the
elements
3. The means of escape are how
the micro-organism leaves the
reservoir.
4. The method of transmission is
how the micro-organism moves
from place to place.
5. The means of entry is how the
micro-organism enters the host.
There must be an adequate
number of organisms to cause
infection.
6. The host susceptibility is the
person who may become infected.
5
3
2
0