Definition of pathogens
Fungus
A eukaryotic organism that does not photosynthesise and feeds on dead or decaying material
Alga
A eukaryotic organism that is not an animal, a plant or a fungus
Pathogen
A microorganism that causes disease
Virus
A non-living in infectious pathogen that replicates inside the cells of another organism
Infection
A pathogen reaching the tissues of a new organism
Hygiene
A practice that keeps things clean to stop the spread of pathogens
Bacterium
A prokaryotic organism (no nucleus)
Toxin
A protein poison produced by a pathogen
Vaccination
Injecting a dead or weakened form of a pathogen to develop immunity, without the individual having to suffer from the disease
Vector
Something that carries a pathogen from one organism to another