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| protection against a disease acquired by being infected with the pathogen that causes the disease. |
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| What occurs when bacteria develop a tolerance to and survice treatment with drugs that once killed them. |
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| a group of medicines used to kill or slow the growth of bacteria that cause disease. |
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| a chemical substance made by the body to help destroy an invading pathogen. |
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| A substance that stimulates the production of an antibody when introduced into the body. They can be toxins, bacteria, viruses, and other foreign substances. |
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| is a substance that is designed to kill microbes before they enter the body. |
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| The process by which a single organism produces offspring that have the same genetic material. |
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| unicellular organisms that lack membrane-bound structures; a common term used to describe prokaryotes. |
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| industrial use of living organisms, or parts of living organisms to produce foods, drugs, or other products. |
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| the protein shell that surrounds a virus. |
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| a person with a disease that they can pass on to other organisms. |
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| a short hair-like appendage used by microorganisms for motion. |
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| An organism that obtains its nutrition and energy by eating other organisms. |
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| an infectious disease that can be transmitted or spread from one organism to another. |
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| An organism that obtains energy by breaking down the wastes of organisms or the remains of dead organisms. |
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| is any change that disrupts the normal function of one or more body systems. |
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| a disease that spreads over a wide geographic area. |
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| unicellular protist that lives in freshwater characterized by a reddish eyespot and a single flagellum |
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| when an organism comes into contact with a chemical, and the chemical gets inside the organism's body |
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| an organelle of the protist euglena that is sensitive to light. |
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| a whip-like structure on unicellular organisms that aids with movement. |
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| Any of a wide variety of organisms that reproduce by spores, including mushrooms, molds, yeasts, and mildews. |
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| A cell that a virus infects and uses to make copies of itself. |
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| any disease that is caused by a pathogen. |
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| an acute, commonly epidemic disease, occurring in several forms, caused by numerous rapidly mutating viral strains and characterized by respiratory symptoms. |
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| any organism or near life form that cannot be seen with the naked eye. |
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| a toxic chemical that causes damage to an organism’s DNA. |
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| a random change to a gene that results in a new trait. |
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| a disease that cannot be spread from one organism to another. |
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| A depression leading to the mouth in parameciums. |
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| an animal-like protist that is covered with cilia. |
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| an organism that derives nourishment or habitat from the tissues or fluids of another organism. A eukaryotic pathogen can be unicellular or multi-cellular. |
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| a microbe that causes disease in an organism. |
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| generally, a single-celled organism with a nucleus and organelles, including amoebas, euglenas, paramecia and volvox. |
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| an extension of the cytoplasm used for movement in some organisms. A means of locomotion for an amoeba; literally, “false foot.” |
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| any preparation used as a preventive inoculation to confer immunity against a specific disease, usually employing an innocuous form of the disease agent, as killed or weakened bacteria or viruses, to stimulate antibody production. |
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| an animal that carries and transmits a disease. |
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| a particle consisting of DNA encased in a protein coat that must inject its DNA into a living cell in order to reproduce. A microbe that consists of nucleic acid enclosed within a protein shell that requires a living cell in order to reproduce. Scientists consider the virus to be not alive. |
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| flagellated unicellular green algae that form spherical colonies |
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