OBJECTIVES
Define infectionand describe what is
meant by the terms local, systemic,
communicable, and nosocomial.
Identify the components of the chain of
infection and give examples of each, and
describe infection control procedures to break
the chain.
Define blood borne pathogen, list
examples, and describe the means of
transmission of blood borne pathogens in a
healthcare setting.
Describe proper procedures for hand
washing, and donning and removing
protective clothing.
Describe standard precautions outline
by the Centers for Disease Control and
Prevention.
3.
INFECTIONS
Microbes thatare capable of causing disease
are called pathogens
The majority of microbes are
nonpathogenic meaning they do not cause
disease under normal conditions.
If a pathogen invades the body and
multiplies, the resulting condition is called an
infection.
4 broad categories of infection
Local – restricted to a small area of the
body
Systemic – the entire body is effected
Communicable – spread from person to
person
Nosocomial – hospital-acquired
infections (HAIs)
4.
CHAIN OF INFECTION
Infection transmission
requires
Source of pathogenic
microbes
Means of transmission
Susceptible host
5.
CHAIN OF
INFECTION
- SOURCE
Patients
Personnel
Visitors
Equipment
Foodor water
Person’s own normal flora
Factors effecting transmission
• Amount of pathogen
• Viability – ability of pathogen to survive
on the source
• Virulence – the degree to which an
organism is capable of causing disease
6.
MEANS OF TRANSMISSION
•Direct – direct, physical transfer of a pathogen such
as touching or kissing
• Indirect – host contact with a contaminated object
such as gloves, needles, medical equipment
Contact
transmission –
most frequent mode
• Sneezing
• Coughing
• Suctioning procedures
Droplet transmission –
infectious microbe is
transferred to the mucous
membranes of nose or mouth
• Special air handling is required for patients who
have infections with airborne transmission
• Mycobacterium tuberculosis, rubeola virus, varicella
virus are common
Airborne transmission –
evaporated droplets
generated by sneezing or
coughing, they remain
suspended in the air for long
periods of time
7.
MEANS OF TRANSMISSION
•Female Anopheles mosquito -
Plasmodium sp – malaria
• Rodent fleas – Yersinia pestis –
plague
Vector
transmission –
microbe is
transferred by an
insect or animal
• Raw chicken - Salmonella
• Poor drinking water – Shigella
Vehicle
transmission –
microbe
transferred
through food,
water, or drugs
BREAKING THE CHAIN
OFINFECTION
Ways to prevent transmission
Handwashing
Gloves
Gowns
Masks
Isolation procedures
Decontamination of
surfaces and instruments
10.
HANDWASHING
Wet yourhands with running water.
Apply liquid, bar or powder soap.
Lather well.
Rub your hands vigorously for at least 15 seconds. Remember to scrub all
surfaces, including the backs of your hands, wrists, between your fingers
and under your fingernails.
Rinse well.
Dry your hands with a clean or disposable towel or air dryer.
If possible, use your towel to turn off the faucet.
Keep in mind that antibacterial soap is no more effective at killing germs
than is regular soap. Using antibacterial soap may even lead to the
development of bacteria that are resistant to the product's antimicrobial
agents — making it harder to kill these germs in the future.
11.
BLOODBORNE PATHOGENS
Infectious microbesin blood, tissues, or body fluids
You are at particular risk of percutaneous contact
(needle stick)when performing phlebotomy
Bloodborne Pathogens
Hepatitis B and C
HIV
Human T cell
Lymphotropic Virus
I and II
Syphilis
12.
BLOODBORNE PATHOGENS
Transmissionof blood borne pathogens
Nonintact skin – direct contact of the pathogen with
visible and nonvisible preexisting cuts, including chapped
hands and dermatitis
Percutaneous – through the skin, needle sticks, broken
glass, human bites, transfusion
Mucous membrane – contact with nasal oral or
conjuctival mucosa by droplets, aerosols, or splashes -
or touching eyes, nose, or mouth with contaminated
hands
13.
GLOVES
Putting ongloves
Pull gloves on tightly
Stretch ends over the
cuffs of the gown
Removing gloves
Pull gloves off from the
open end
Turn one inside out
and place in other fist
Remove other glove
turning it inside out
Avoid touching the
outside surface of the
gloves
14.
STANDARD PRECAUTIONS
• Precautionsused in caring for all patients because of the difficulty in
determining individuals with various infections
• Hand washing – use alcohol based sanitizer unless visibly contaminated,
then use soap and water
• Gloves – wear gloves when handling blood, body fluids, or tissue or
items contaminated with blood or body fluids
• Gowns – wear fluid resistant gowns when contamination of clothing is
likely
• Face protection – wear face shield when there is a possibility of aerosol
formation
• Sharps – Dispose of needles and sharps in a puncture proof container.
Do not recap needles
• Respiratory hygiene – cover your cough with a tissue or cough into your
elbow if you do not have a tissue
15.
REFLECTION –
YOU HAVE
LEARNED
Themeaning of the terms local, systemic,
communicable, and nosocomial.
The components of the chain of infection and
can give examples of each, and you can
describe infection control procedures to
break the chain.
What constitutes a blood borne pathogen,
you can give examples, and the means of
transmission of blood borne pathogens in a
healthcare setting.
Proper procedures for hand washing, and
donning and removing protective clothing.
Standard precautions outline by the Centers
for Disease Control and Prevention.