NR 224 Fundamentals Exam 1
Infection is the invasion of a susceptible host by
pathogens or microorganisms, resulting in
disease. Entry and multiplication of organisms
result in disease
Colonization occurs when a microorganism invades the host
but does not cause infection
Communicable Disease is the infectious disease transmitted from one
person to another.
Page 1 of 19
,NR 224 Fundamentals Exam 1
If pathogens multiply and cause the infection is symptomatic
clinical signs and symptoms....
If clinical signs and symptoms are the illness is asymptomatic
not present..
***Most important technique to use HAND HYGIENE!
in preventing and controlling
transmission of infection is....
***Chain of Infection 1)Infectious agent or pathogen
2)Reservoir or source for pathogen growth
3)Portal of exit
4)Mode of transmission
5)Portal of entry
6)Susceptible host
Direct contact Person to person OR Person to source
Page 2 of 19
, NR 224 Fundamentals Exam 1
Indirect contact Person to inanimate object
Droplet contact Coughing, Sneezing, Talking (Lg particle only 3
ft)
Airborne Droplet nuclei or residue suspended in air or
carried on dust particles
Vehicles Food, water, drugs and solutions, blood, fomites
Page 3 of 19
Infection is the invasion of a susceptible host by
pathogens or microorganisms, resulting in
disease. Entry and multiplication of organisms
result in disease
Colonization occurs when a microorganism invades the host
but does not cause infection
Communicable Disease is the infectious disease transmitted from one
person to another.
Page 1 of 19
,NR 224 Fundamentals Exam 1
If pathogens multiply and cause the infection is symptomatic
clinical signs and symptoms....
If clinical signs and symptoms are the illness is asymptomatic
not present..
***Most important technique to use HAND HYGIENE!
in preventing and controlling
transmission of infection is....
***Chain of Infection 1)Infectious agent or pathogen
2)Reservoir or source for pathogen growth
3)Portal of exit
4)Mode of transmission
5)Portal of entry
6)Susceptible host
Direct contact Person to person OR Person to source
Page 2 of 19
, NR 224 Fundamentals Exam 1
Indirect contact Person to inanimate object
Droplet contact Coughing, Sneezing, Talking (Lg particle only 3
ft)
Airborne Droplet nuclei or residue suspended in air or
carried on dust particles
Vehicles Food, water, drugs and solutions, blood, fomites
Page 3 of 19
