A virus that causes acquired immune deficiency syndrome.

Immunity that the body develops after overcoming a disease, or through inoculation.

The ability of the body to destroy and resist infection.

Immunity that is partly inherited and partly developed through healthy living.

Short, rod-shaped bacteria.

Round-shaped bacteria that appear singly or in groups.

Spiral or corkscrew-shaped bacteria.

One-celled microorganisms that have both plant and animal characteristics. Some are harmful; some are harmless.

An abnormal condition of all or part of the body, or its symptoms or organs which make the body incapable of carrying on normal function.

Single-cell organisms that grow in irregular masses that include molds, mildews, and yeasts; can produce contagious diseases such as ringworm.

A parasitic submicroscopic particle that infects and resides in cells of biological organisms.

Disease-causing microorganisms carried in the body by blood or fluids, such as hepatitis and HIV.

Also known as a communicable disease; disease that is spread from one person to another person.

The presence, or the reasonably anticipated presence, of blood or other potentially infectious materials on an item's surface or visible debris or natural nail or toe and foot infections.

The invasion of body tissues by disease-causing pathogens.

A condition in which the body reacts to injury, irritation, or infection; characterized by redness, heat, pain, and swelling.

Spherical spores that grow in pairs and causes diseases such as pneumonia.

Pus-forming bacteria arranged in curved lines. Causes infections such as strep throat and blood poisoning.

Pus-forming bacteria that grow in clusters. Causes abscesses, pustules, and boils.

A bloodborne virus that causes disease and can damage the liver.

Transmission of blood or body fluids through contact with an intermediate contaminated object such as a razor, extractor, nipper, or an environmental surface.

A type of fungus that affects plants or grows on inanimate objects, but does not cause human infections in the salon.

Organisms that grow, feed, and shelter on or in another organism, while contributing nothing to the survival of that organism.

A contagious skin disease that is caused ty the itch mite, which burrows under the skin.

Bacteria that is harmless

Bacteria that is harmful

A fungal infection that is primarily limited to the bearded areas of the face and neck.

A fungal infection of the scalp characterized by red papules.

A ringworm fungus of the foot. Also known as "athlete's foot".