Infection Control in Dental
Hygiene: Transmissible
Diseases 2026 | Study
Guide, Practice Questions,
Answers, Rationales &
Exam Review | Complete
Ethics Study Guide
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
, Infectious Agents Organisms that can produce infection or infectious disease.
Bacteria Microscopic living organisms, composed of single cell, found in every habitat and
environment; some diseases caused by bacteria can be treated with antibiotic
medications while others can be prevented through vaccination.
Viruses Microscopic organisms that are generally considered to be non-living as they can
only replicate within a host.
Fungi Single cell or complex multicellular living organisms; disease caused by fungi can
be treated with an antifungal agent, no vaccines available to prevent.
Protozoa Single cell organisms causing parasitic infections.
Helminths Multicellular invertebrates that cause parasitic infections.
Prions Misfolding proteins transmitted to humans by infected meat products that prompt
normal proteins to misfold causing neurodegenerative diseases.
Passive Immunity Protection transferred from one animal or person to another, providing immediate
but temporary immunity.
Active Immunity Protection acquired in the body by having the disease and recovering or by
vaccination, takes time to develop and can provide lifelong immunity.
Vaccines Products that provide immunity by stimulating the immune system to produce
antibodies to a specific infectious agent.
Live Attenuated Vaccines Contain a weakened form of the infectious agent and can provide lifelong immunity.
Inactivated Vaccines Contain whole or partial inactive infectious agents manipulated to elicit an immune
response; immunity may not last and may require multiple doses and booster
vaccinations.
Hygiene: Transmissible
Diseases 2026 | Study
Guide, Practice Questions,
Answers, Rationales &
Exam Review | Complete
Ethics Study Guide
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
, Infectious Agents Organisms that can produce infection or infectious disease.
Bacteria Microscopic living organisms, composed of single cell, found in every habitat and
environment; some diseases caused by bacteria can be treated with antibiotic
medications while others can be prevented through vaccination.
Viruses Microscopic organisms that are generally considered to be non-living as they can
only replicate within a host.
Fungi Single cell or complex multicellular living organisms; disease caused by fungi can
be treated with an antifungal agent, no vaccines available to prevent.
Protozoa Single cell organisms causing parasitic infections.
Helminths Multicellular invertebrates that cause parasitic infections.
Prions Misfolding proteins transmitted to humans by infected meat products that prompt
normal proteins to misfold causing neurodegenerative diseases.
Passive Immunity Protection transferred from one animal or person to another, providing immediate
but temporary immunity.
Active Immunity Protection acquired in the body by having the disease and recovering or by
vaccination, takes time to develop and can provide lifelong immunity.
Vaccines Products that provide immunity by stimulating the immune system to produce
antibodies to a specific infectious agent.
Live Attenuated Vaccines Contain a weakened form of the infectious agent and can provide lifelong immunity.
Inactivated Vaccines Contain whole or partial inactive infectious agents manipulated to elicit an immune
response; immunity may not last and may require multiple doses and booster
vaccinations.
