Pathogen - An organism that causes disease, Disease - any change that impairs the function of an individual, Infection - a pathogen being present in a host., Germ Theory - states that specific microbes cause specific infectious diseases., Microbes - microscopic organisms, Microbiota - the term for the microbes that are normally present in and on the human body; usually beneficial, Incubation period - interval between initial infection and first signs and symptoms of disease, Asymptomatic carriers - infected but show no symptoms of disease, Communicable disease - a disease that is spread from one host to another, Non-communicable diseases - are not infectious and cannot be passed from one organism to another, Direct Transmission - by person-to-person contact, such as may occur through kissing or sexual contact, Indirect Transmission - by airborne droplets or particles, Vector - agents of disease transmission, Zoonotic Diseases - disease that can be passed between animals and humans, Cellular Pathogen - a pathogen that is made up of cells, such as a tapeworm, fungus or bacterium, Non Cellular Pathogen - A pathogen that is not made up of cells, such as a virus, prion or viroid, Bacteria - single-celled organisms that lack a nucleus; prokaryotes, Virus - A tiny, nonliving particle that invades and then reproduces inside a living cell., Prion - Infectious protein particles,

Pathogen and Disease

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