بسم الله الرحمن الرحيم. common terminologies in infection control contamination...
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الرحيم الرحمن الله بسم
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COMMON TERMINOLOGIES IN INFECTION CONTROL
CONTAMINATION Bacteria present on surfaceCOLONIZATION : presence and multiplication of microorganisms in or on a host without tissue damage.Bacteria present on surface.
INFECTION : entry and multiplication
of an infectious agent in the tissues of the host.
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ENDOGENOUS INFECTION : The organisms derived from patients own flora.EXOGENOUS INFECTION : Organisms are derived from outside forces.
INCUBATION PERIOD : time of initial contact with the infectious agent to the appearance of the first symptoms.
COMMON TERMINOLOGIES IN INFECTION CONTROL cont’d
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COMMON TERMINOLOGIES
IN INFECTION CONTROL cont’d
ENDEMIC INFECTION : An infectious disease that
exhibits a relatively constant number of cases over a
long period of time in a particular geographic area .
EPIDEMIC INFECTION : When excess over the expected incidence of disease within a geographic area during a specified time period .
PANDEMIC INFECTION : The spread of an epidemic across continents .
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COMMUNITY ACQUIRED INFECTION : infection present or incubating on admission
with no association to previous hospitalization
at the same facility
HOSPITAL ACQUIRED INFECTION : A
nosocomial infection can be defined as an
infection acquired in the hospital after 72
hours of admission to hospital.
COMMON TERMINOLOGIES IN INFECTION CONTROL cont’d
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HOSPITAL AQUIRED INFECTION ( NOSOCOMIAL INFECTION )
It is an infection meeting the following criteria :Not present or incubating on admission1. An infection temporarily associated with
admission to or a procedure done at health care facility .
2. An infection incubating at that time of admission that is related to previous hospitalization at the same facility or identified on admission following performance of the procedure during a previous admission
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COMPONENTS OF INFECTION PROCESS
CAUSATIVE AGENTS
RESERVOIR OF THE AGENT
PORTAL OF EXIT
MODE OF TRANSMISSION
PORTAL OF ENTERY
SUSCEPTIBLE HOST
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Any biological ,physical or chemical entity capable of causing disease is called an agent )The micro-organism that can cause infection).
MICRO-ORGANISMS: Organisms that can be seen only with the magnification of a microscope .They exit every where in the environment .
# Bacteria# Viruses# Fungi# Parasites
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Some Micro-organisms are normally present on people’s skin & in Respiratory ,Intestinal , & Genital tract ; these micro-organisms are called NORMAL FLORA.
Other Micro-organisms are normally not found on or in the human body & are usually associated with disease ;these micro-organism are known as PATHOGENS.ALL MICRO-ORGANISMS, including normal flora ,can cause infection or disease if certain conditions exist:
Normal flora are introduced an area of the body in which they are not normally found .
Pathogens are introduced into the body . Micro-organisms are introduced into the body of a person
who is immunocomprimised & thus susceptible to infections to which he or she otherwise would not be susceptible .
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It is a place in which an infectious agent can survive but may or may not multiply
# Human-Beings# Animals# Plants# Soil# Air# Water# Solutions & Instruments
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It is the path by which an infectious agent leaves the source.
Respiratory tract (e.g., lungs). Genitourinary tract (e.g., vagina, penis). Mucous membranes (e.g., eyes, nose, mouth). Gastrointestinal tract (e.g., mouth ,anus). Blood-stream . Broken skin (e.g., puncture ,cut, surgical site,
rash). Tran placental ( mothers –to- fetus ).
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The mechanisms or the way in which the infectious agent moves from the reservoir to a susceptible host.
Transmission can occur by four modes: CONTACT TRANSMISSION :The infectious
agent can be transmitted directly from the reservoir to a susceptible host through touch (e.g.,staphyllococcus) ,sexual inter-course (e.g., gonorrhea, HIV), or droplets (e.g., influenza).
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VEHICLE TRANSMISSION : The infectious agent can be transmitted indirectly from the reservoir to a susceptible host by material that maintains the life of the infectious agent .
Food (e.g, salmonella )
Blood (e.g, Hepatitis B , HIV)
Water (e.g, Cholera , Shigella)
Instruments & Others Items (e.g, Hepatitis B , HIV , Pseudomonas )
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AIRBORNE TRANSMISSION : The infectious agent can be carried by air currents (e.g, Measles , Mycobacterium Tuberculosis , Varicella zoster ).
VECTOR TRANSMISSION: The infectious agent can be transmitted to a susceptible host through insects & other invertebrate animals (e.g, Mosquitos can transmit Malaria & Yellow Fever ; fleas can transmit plague ) .
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The route by which the infectious agent moves into (enters ) susceptible host. Respiratory tract (e.g., lungs).(e.g., lungs). Genitourinary tract (e.g., vagina, penis).(e.g., vagina, penis). Mucous membranes (e.g., eyes, nose, mouth).(e.g., eyes, nose, mouth). Gastrointestinal tract (e.g., mouth ,anus).(e.g., mouth ,anus). Blood-stream .. Broken skin (e.g., puncture ,cut, surgical site, (e.g., puncture ,cut, surgical site, rash).rash). Tran placentalTran placental ( mothers –to- fetus ).( mothers –to- fetus ).
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Host characteristics that influence susceptibility & severity of disease are :
Age
Sex
Socio-Economic status
Disease history
Nutritional status
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OccupationImmunization statusDiagnostic /Therapeutic proceduresMedicationsPregnancyTraumaHeredityEthnicityMarital status
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How can we break the chain of infection?
Link InterventionAccurate and rapid identification of micro-organisms Early recognition of sign and symptoms of infection
1-Infectious or Causative Agent
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How can we break the chain of infection?
Link InterventionEmployee health examinations and
screening Environmental sanitization including floors, walls, exam tables and beds Disinfection/Sterilization of equipment and instruments Standard Precautions Medical Asepsis Proper Hygiene - bathing and hand washing Clean gowns, linens and towels Clean wound dressings
2-Reservoirs
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How can we break the chain of infection?
Link InterventionHand washing
Use of Personal Protective Equipment such as gloves, gowns, facemask, N95 . Clean dressings over wounds Medical Asepsis or Clean Technique Control of excretions and secretions Covering the mouth and nose when coughing or sneezing Proper trash and waste disposal Standard Precautions
3-Portal of Exit
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How can we break the chain of infection?
Link InterventionHand washing
Standard Precautions Rooms with air flow control Safe Food handling Isolation Transmission-based precautions Sterilization of equipment and supplies Medical and Surgical Asepsis Use of Personal Protective Equipment such as gloves, gowns, facemask, N95 .Proper disposal of contaminated objects
4-Method or Mode of Transmission
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How can we break the chain of infection?
Link InterventionAseptic technique
Sterile technique or Surgical Asepsis Medical Asepsis or Clean Technique Catheter Care Wound care Proper Disposal of needles or sharps Maintaining skin integrity Standard Precautions
5-Portal of Entry
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How can we break the chain of infection?
Link InterventionTreatment of Disease Recognition of clients at risk Immunization Exercise Proper Nutrition
6-Susceptible Host
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PREVENTIVE PATIENT CARE PRACTICES
1. Hand washing
2. Aseptic technique
3. Standard precautions
4. Sterilization
5. Disinfection
6. Isolation Precaution
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HAND WASHING:- It is the process for the removal of soil and
transient microorganisms(E.g. E. COLI) from the hands.
HAND ANTISEPSIS:-
It is a process for the removal or destruction of transient microorganisms.
SURGICAL HAND SCRUB :-
It is a process to remove or destroy transient microorganisms and reduced resident flora, (E.g. Diphtherias )
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Types of the Hand Washing♣ ROUTINE HAND WASHING or HYGIENIC
HAND WASHING:-
It is accomplished by vigorously rubbing together all surfaces of lathered hands followed by through rinsing under a stream of water.
This should take 10-15 seconds to complete.
The hands should be dried with a paper towel.
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Types of the Hand Washing cont’d
♣ SURGICAL SCRUB:-
It is the process that begin with washing
hands and forearms thoroughly to remove
dirt and transient bacteria .
A nail cleaner should be used to clean
under the nails.
It should take for 5 minutes.
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VARIOUS HAND DECONTAMINANTS
Soap solution:-
Soap have a detergent effect.
They remove transient microorganisms
physically but have no effect on the
resident microbial population.
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VARIOUS HAND DECONTAMINANT cont’d
CHLOROHEXIDINE:-
It is a broad - spectrum activity .
It binds to the stratum corneum,
continuing to destroy bacteria for at
least six hours.
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VARIOUS HAND DECONTAMINANTS cont’d
POVIDINE IODINE:-
It is often used in the operating theatre
because it destroys spores more
effectively than many other antiseptics.
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VARIOUS HAND DECONTAMINANTS cont’d
ALCOHOL HAND-RUBS, GEL & WIPES:-
They have excellent bactericidal
activity against most gram – positive
and gram- negative bacteria but have
no effect on spores.
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INDICATIONS FOR HAND WASHING
When coming on duty.
After removing gloves.
When hands are soiled including after sneezing, coughing, or blowing your nose.
Between patients contact.
Before medication preparation.
After personal use of the toilet.
Before performing invasive procedures.
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INDICATIONS FOR HAND WASHING cont’d
Before taking care of particularly susceptible
patients, such as who are severely Immuno-
compromised & Newborns.
Before and after touching wounds.
Before eating.
After touching inanimate objects that are
likely to be contaminated with pathogenic
micro-organisms E.g. urine measuring
devices, secretion collection apparatus..
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INDICATIONS FOR HAND WASHING cont’d
After taking care of infected patients or
patients who are likely to be colonized
with microorganisms for special clinical
or epidemiologic significance. (E.g.
Multi-drug resistant bacteria-M.D.R.O).
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PROCEDURES FOR HAND WASHINGRemove all rings, jewelry and roll up the
sleeves.
Wet hands under the running water.
Apply 3-5 ml of hand wash to the palms of the hands.
Rub to make lather.
Rub hands together cup them around each other massage fingertips, thumps and webs of the hands.
Rinse hands under running water.
Dry hands thoroughly with paper towels.
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ASEPTIC TECHNIQUEIt is an a method used to prevent
contamination of wounds and other
susceptible sites by organisms that
could cause infection.
This can be achieved by using sterile
equipment and fluids used for invasive
medical and nursing procedures.
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STERELIZATION It is the complete elimination of all
viable microorganisms including viruses, fungi, and their spores both pathogenic and non- pathogenic.
DIS-INFECTION Disinfection implies the removal of all
life forms capable of causing disease.( all viable microorganisms except bacterial spores).
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STANDARD PRECAUTIONS
The term standard precautions refers to a
system of infection control practice which
assumes that every direct contact with
blood and body fluid is potentially infections.
CONCEPT OF STANDARD PRECAUTIONS:
1. It should be implemented to all patients.
2. Standard precautions are not generally
intended to reduce cross contamination
among patients and they do not replace other
precautions.
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ELEMENTS OF STANDARD PRECAUTIONS
Hand washingGlovesMasks, eyewear, face shieldsGowns and apronsCare of sharps and needlesCare of spillage’s of blood and body fluidsCare of laboratory specimensDisposal of wasteDisposal of linenCare of resuscitation equipment
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ISOLATION PRECAUTION These are guidelines created to
prevent transmission of microorganisms
in hospitals. They are Transmission Based Isolation
designated for care of patients with known
or suspected infectious disease spread by
one of the following routes:- AIR-BORNE . DROPLET. CONTACT.
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ISOLATION
The separation of a person
with infectious disease from
contact with other human
beings, for the period of
communicability
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BASIC PRINCIPLES FOR ALLCATEGORIES OF ISOLATION
1.Necessity of a single room 2.Hand washing 3. Use of protective barriers as per need 4.Disposal of waste in orange bags.
5.Disposal of linen in water- soluble linen bags.
6.Request for a isolation diet tray (with
disposable cutleries)
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Q. What is the simplest and mostimportant practice a nurse can do toreduce contamination and spread ofinfection?A. Proper hand hygiene is the singlemost important infection preventionand control practice.