Reservoir - An organism in which a parasite that is pathogenic for some other organism lives and reproduces without harming its host.⏎
Prion - A causative agent of infectious disease that is composed primarily of protein.⏎
Nanometer - A unit of length equal to one one-billionth (1 x 10-9) of a meter.⏎
Nerve Toxin - Also called neurotoxins, these refer to poisonous substances that cause damage to cells in the nervous system.⏎