Infection control Flashcards
Virulence
Strength of a pathogen’s ability to cause disease.
Chain of Infection
Virulence, number of microorganisms, susceptible host and portal of entry.
Number of microorganisms
a high enough number of pathogenic microorganisms must be present to overwhelm the body’s defenses.
Susceptible host
is a person who is unable to resist infection by a particular pathogen.
Portal of entry
means of entering the body.
Acute infection
symptoms are severe and appear soon after the initial infection occurs. - short duration -
Chronic infection
microorganisms mat persist for life. - long duration -
Latent infection
persistent infection in which symptoms “come and go”
Opportunistic infection
are caused by normally nonpathogenic organisms, occur in individuals whose resistances is decreased or compromised.
Infectious disease
Is one that is communicable or contagious, can be transmitted from one host to another.
Direct transmission
person to person - sneezing, coughing or splatter during treatment.
Indirect transmission
occurs when microorganisms first are transmitted to an object or surface, and then are transferred to another person who touches those objects or surfaces.
Airborne transmission
also known as droplet infection- spread of disease through droplets of moisture that contain bacteria or viruses.
Blood-borne transmission
are carried in the blood and body fluids of infected individuals and can be transmitted to others.
Immune system
responsible for providing resistance to communicable diseases.