Method of Transmission Flashcards
what are the three modes of transmission
direct, indirect and airborne transmission
this can be either vehicle borne or vector borne transmission
indirect transmission
an animal or flying or crawling insects that serves as an intermediate means of transporting the infectious agent.
vector borne transmission
any substance that serves as an intermediate means to transport and introduce an infectious agent into a susceptible host through a suitable portal or entry.
vehicle borne transmission
It involves immediate and direct transfer of microorganisms from individual to individual through touching, kissing, or sexual intercourse.
direct transmission
this type of transmission may involve droplets or dust.
airborne transmission
the residue of evaporated droplets emitted by an infected host
droplet nuclei
any individual who is at risk for infection
susceptible host
someone at increased risk, an individual who for one or more reasons is more likely than other to acquire an infection.
compromised host.
what are the two body defenses
nonspecific and specific defenses
are directed against identifiable bacteria, virus, fungi, or other infectious agents
specific(immune) defenses
protect the individual against all microorganisms
nonspecific defenses
these injurious agents include mechanical objects causing trauma to tissues , excessive heat or cold and radiation.
physical agents
These injurious agents include external and internal irritants.
chemical agents
include the broad groups of bacteria, viruses, fungi and parasites
microorganisms