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microorganisms that are part of the normal flora of the body and are beneficial in maintaining certain body processes
parasitic microorganisms which means they cannot live outside cells of another living organism
(serum hepatitis) a diesease cause by the HBV virus and is transmitted by blood, serum and other body secretions
a disease caused by the HCV virus and is transmitted by blood and blood containing body fluids
The pathogen responsible for causing an infection; also called the infectious agent.
mode of transmission
way that the causative agent can be transmitted to another reservoir or host where it can live
chain of infection
Infectious agent, reservoir, portal of exit, means of transmission, portal of entry and susceptible host.
the things that prevent or inhibit growth of pathogenic organisms but are not effective against spores and viruses
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