Microbe
An organism invisible to the naked eye (microscope is needed)
Pathogen
A disease causing agent or organism
Virus
A disease-causing agent that is too tiny to be seen by the ordinary microscope that can only multiply when inside a cell
Host
An organism on which a parasite lives.
Bacteria
microscopic organisms that often play a role in the decay of living things, the process of fermentation, and sometimes in causing disease. They have 3 shapes (spiral, round or rod shape).
Fungi
A eukaryotic organism that has cell walls, uses spores to reproduce, and is a heterotroph that feeds by absorbing its food.
Parasite
An organism that feeds on a living host
Protist
Kingdom composed of eukaryotes that are not classified as plants, animals, or fungi
Protozoa
Microscopic living things. They belong to a group of organisms called protists, which are neither plants nor animals. Examples:
amoebas and paramecia
Mutant
An organism genetically different from its parent.
Binary Fission
A form of asexual reproduction in single-celled organisms by which one cell divides into two cells of the same size
Conjugation
In bacteria, the direct transfer of DNA between two cells that are temporarily joined.
Epidemic
a widespread occurrence of an infectious disease in a community
For example: "a flu epidemic
Pandemic
an epidemic that is geographically widespread over more than one country
Antibiotic
drugs that kill bacteria or slow their growth
Vector
an organism that transmits a disease