Infectious agents that can enter human hosts.
The study of very small or microscopic organisms of either plant or animal origin.
An organism that requires oxygen for life and reproduction.
An organism that does not require oxygen for life and reproduction.
Drugs used to stop or slow the growth of specific microbes.
Drugs used to stop or slow the growth of bacteria in the body, allowing the body's immune system to kill the invading bacteria.
Drugs that kill bacteria.
Drugs that inhibit bacterial growth.
Drugs used to stop or slow the growth of fungus.
Drugs used to stop or slow the growth of parasitic worms.
Drugs used to stop or slow the growth of viruses.
Diseases characterized by inflammation and destruction of the body's tissues caused by the body's immune system.
Single-celled microorganisms that do not have a defined nucleus and are found virtually everywhere.
Bacteria that cause diseases.
Bacteria that do not cause diseases.
The lab value that counts a certain type of erythrocyte. It is used to assess the magnitude of injury to the immune system and to determine the effectiveness of treatment in HIV and AIDS patients.
The presence of bacteria in a human host that is not part of the normal flora; often resides in the host without causing disease unless overgrowth occurs.
Fungi that cause infection of the hair, skin, and nails.
A condition of the body in which there is abnormal functioning resulting from the effects of hereditary, infection, diet, or exercise.
An infection of the intestinal tract that causes severe diarrhea with blood and mucus.
A disease constantly present in a population.
A greater than normal number of cases of a disease in an area within a particular period.
The study of the causes and origins of disease.
An inanimate object on which pathogens may be transmitted.
Plant-like organisms that lack chlorophyll and need to live off of a food source that is either dead or alive.
Having an immune system that possesses the ability to mount a normal immune response.
Having an immune system that is weakened by disease, or as a result of treatment; the risk of susceptibility to infections is increased.
A condition in which the body's immune response is damaged, weakened, or is not functioning properly.
Suppression of the immune system by drugs or radiation therapy, in order to prevent rejection of a transplanted organ, or to control an autoimmune disorder.
The study of very small or microscopic organisms of either animal or plant origin.
The study of bacteria.
The study of fungi, to include molds, mushrooms, and yeasts.
The study of parasites.
The study of protozoa.
The study of viruses.
A unit of length, equal to one-millionth of a meter.
The study of the form and structure of an organism.
Affecting the skin and mucous membranes.
A general term pertaining to any fungal infection, either superficial or systemic.
An abnormally low white blood cell count, which will hamper the body in fighting infections.
Microorganisms that do not cause disease.
Microorganisms that constantly and consistently inhabit the human body; some of which are known to perform tasks that are useful for the human host.
A worldwide epidemic of a particular disease.
An organism that lives within or upon another form of life and depends on that form of life for nourishment and survival.
An organism or bacteria capable of causing disease.
A reproductive element of a plant or microorganism, usually in a resting state and encased in a hard, resistant protein coat.
Affecting the body as a whole. Generally life-threatening.
A poisonous substance.
An insect or other organism that transmits parasitic microorganisms from person to person.
A small microorganism, which needs a living cell to replicate.
Any organism that cannot be seen by the human eye and typically consists of only a single cell.
Noncellular pathogens that replicate by directing the synthesis of virus-specific proteins and nucleic acids inside tissue cells.
A biological term that describes a state of having sufficient biological defenses to avoid infection, disease, or other unwanted biological invasion.
Drugs are used to treat parasitic infections such as body life, head lice, scabies, and crabs.
Tissue that is rich in mucous secreting glands that line body passages and cavities that communicate directly or indirectly or indirectly with the external environment.
A method of identifying bacteria; includes two types of dye:
Crystal Violet (blue) - Gram positive
Safranin (red) - Gram negative
Identification of the antibiotics that are effective against specific bacteria.