Asepsis/Infection Flashcards
Minute (tiny) organisms that cannot be seen by the naked eye
Microorganisms
Absence of pathogenic microorganism
Asepsis
Capable of producing a disease
Pathogenic
Not capable of producing a disease
Non pathogenic
Causes disease only in a susceptible host
Opportunistic pathogen
Invasion of body tissue by Microorganisms
Infection
Presence and growth of Microorganisms within a host but without tissue invasion or damage (ex. Some types of MRSA)
Colonization
Experiences localized symptoms (pain, tenderness, and redness) at wound site
Local infection
Affects whole body (can be fatal if untreated)
Systemic infection
Short and quickly forming infection
Acute infection
Slow forming and long presence of infection
Chronic infection
Neutrophils, Eosinophils, Basophils
Granulocytes
Monocytes, Lymphocytes
Agranulocytes
Segs/Polys
First phagocytes on the scene
Immature
Can be called band/stabs because they are unsegmented nuceli
Neutrophils
Weak but good at detoxifying allergens
Defend against parasites/help restrain hypersensitivity reactions
Eosinophils
Play a role in hypersensitivity reactions by secreting histamine, serotonin, and heparin
Decreases with allergic reactions
Basophils
Monocytes, lymphocytes
Agranulocytes
Monos Largest WBC Phagocytes Act more slowly than segs (neutrophils), but have a longer life, so they can consume more bacteria Seen with chronic infection
Monocytes
Lymphs
Originate in bone marrow and mature primarily on lymph nodes
Responsible for producing antibodies
Includes T & B cells
Lymphocytes
result from the delivery of health services in a health care faciilty
HAI -healthcare associated infection (nosocomial infection)
infection in which part of a persons normal flora becomes altered and overgrowth results
endogenous infection
infection that comes from microorganisms from outside of a persons body environment
exogenous infection
type of HAI from a diagnostice or therpeutic procedure
Iatrogenic infection
infectiosn that develop when broad spectrum antibiotics are used for a long period of time
-it kills the good bacteria
superinfection
general practices to reduce the number aand transfer of microorganisms to others and other things (clean technique)
medical asepsis
refers to practices which keep objects free from alll microorganisms (sterile technique)
surgical asepsis
- infectious agent 2. reservoir 3. portal exits 4. mode of transmission 5. portals of entry 6. susceptible host
chain of infection
permanent resident pathogens on the skin (normal flora)
resident pathogen
attach to skin during contact with another erson or object
transient pathogens
- # of microorganisms 2. pathogenicity (ability to produce disease 3. ability to enter/survive host 4. susceptibility of the host
potential for microorganisms to cause disease depends on these
the source for pathogenic growth
reservoir
the _____ ____ is the most common reservoir
human body
persons/ animals who have no symptoms but have pathogens
carriers
food, water, inanimate objects, insects
things that can be carriers
food, oxygen, moisture/water, right temperature, right pH, darkness
things that microorganisms need to survive
a mean of escape from the reservoir
portal of exit
route or means of contact (how it gets transmitted)
mode of transmission
infected person to noninfected person
direct transmission
personal contact of host with contaiminated inanimate object or animals
indirect transmission
fomites - instruments, utensils, needles, caths, drsg’s
vehicle borne
animals/ insects
vector borne
dust, droplets (tb)
airborne
skin and mucous membranes, respiratory tract, urinary tract, GI, reproductive tract, blood
portals of entry and exit
Intact skin and mucous membranes are the ____ _____ against disease
first barriers
degree of resistance the potential host has against microorganisms
susceptibility
heredity, age, nutritional status, stress, disease process, medical Tx,
things that susceptibility depends on
wounds, burns, travel, smoking, trauma, occupations, multiple sex partners
things that put you at risk
methicillin resistant staphyloccoccus aureus
mrsa
vancomycin resistant enterococci
VRE
gram positive organism that is usually sensitive to penicillin/ found mostly in dorms, prisons
MRSA