active immunity —
immunity to disease resulting from the production of
AIDS (acquired immune deficiency
syndrome) — disease resulting from a disorder
of the immune system by HIV.
antibody — substance
that prevents infection; antibodies are produced by
white blood cells in response to an invasion by an organism
bacteriophage — virus
that invades a bacterium.
capsid — outer protein
coat of a virus.
DNA (deoxyribonucleic acid) — nucleic acid that carries genetic material and
stores the information needed for protein synthesis.
HIV (human immunodeficiency virus) — the virus that causes AIDS.
host — organism in
which another organism lives, such as a parasite.
immunity — body?s
system of natural resistance to disease.
interferon — substance produced by a cell when
it?s invaded by a virus.
lytic cycle — reproductive
process in viruses in which the host cell is killed.
lysenogenic cycle —
reproductive process in temperate viruses.
microorganism — microscopic organism.
parasite — organism
that feeds off other living organisms.
passive immunity —
immunity that occurs when a person receives antibodies
produced in another person or in an animal that has
developed immunity to the disease.
poliomyelitis — viral
disease causing stiffness and paralysis that may result
replicate — process
in which DNA molecules form exact copies or duplicates.
RNA (ribonucleic acid) — nucleic acid that reads genetic information carried
by DNA and guides protein synthesis.
temperate virus —
virus that does not immediately cause disease.
tobacco mosaic — virus
that infects tobacco and other plants.
vaccination — process
in which an antigen is introduced to stimulate the immune
virulent — disease-causing
agent that is highly infectious.
virus — tiny non-living
particle made up of hereditary material and protein.