Test 1 Flashcards
Nosocomial Infection
Hospital acquired infection
Iatrogenic Infection
An infection that occurs after medical or surgical procedure
Medical Asepsis
clean technique
disinfection
Surgical Asepsis
sterile technique
sterilization
Disinfection
cleaning something to destroy bacteria
Sterilization
A procedure to kill all organisms
How does the Infection Cycle work?
infectious agent
reservoir
portal of exit
means of transmission
portal of entry
susceptible host
Which of the following is the most significant and commonly found infection-causing agent in healthcare institutions?
Bacteria
Fungi
Viruses
Mold
Bacteria
Virus
smallest microorganism
infections: common cold and do not respond to antibiotics
Fungi (molds and yeasts)
plantlike organisms
can cause infection and are present in the air, soil, and water
What are factors that affect an organisms potential to produce disease?
number of microorganisms
Virulence of microorganisms
Competence of persons immune system
Length and intimacy of contact between person and microorganism
What are possible reservoirs for microorganisms?
humans-carriers
animals- vectors
soil- vehicles
food, water, milk- vehicles
inanimate objects- vehicles or fomites
Which one of the following infectious agents or diseases may be spread by touching a contaminated inanimate article?
Rabies
Giardia
E. Coli
Influenza
Influenza
What are common portals of exit?
respiratory
gastrointestinal
genitourinary tracts
breaks in skin
blood and tissue
What is direct contact?
close proximity with susceptible host
EX: touching, kissing, and sexual intercourse
What is indirect contact?
vectors: nonhuman organisms
fomites: inanimate objects
Airborne vs Droplet transmission
Airborne: less than 5
Droplet: greater than 5
Body’s defense against infection
body’s normal flora (help to keep harmful bacteria from invading the body)
inflammatory response
immune response
Factors affecting host susceptibility
intact skin and mucus membranes
normal ph levels
body’s wbc
age, sex, race. hereditary factors
immunization, natural, or acquired
fatigue, climate, nutritional, and general health status
stress
use of invasive or indwelling medical devices
In which of the following stages of infection is the patient most contagious?
incubation
prodromal
full stage
convalescent
prodromal stage
Stages of infection
1.Incubation Period: organisms growing and multiplying
2.Prodromal Stage: person is most infectious, vague and non specific signs of disease
patient unaware
Malaise (discomfort)
Fatigue (low fever)
3.Full stage of illness: presence of signs and symptoms
4.Convalescent Period: recovery from the infection
Laboratory Data Indicating Infection
elevated WBC
-4,500 to 10,000
increase in specific types of WBC
elevated erythrocyte sedimentation rate
0-15mm/hr for males
0-20mm/hr for females
presence of pathogen in urine, blood, sputum, or draining cultures
What are antibiotic resistant organisms?
have contact transmission
What are factors predisposing patients to nosocomial infection?
use of invasive medical devices
-urinary catheter or venous access catheter