A/An __________ is a substance that produces an allergic reaction in an individual.

allergen

The acronym __________ identifies the blood test used to screen for the presence of HIV antibodies.

ELISA

A/An __________ is a disease-fighting protein created by the immune system in response to the presence of a specific antigen.

antibody

A/An __________ is any substance that the body regards as being foreign and includes viruses, bacteria, toxins, and transplanted tissues.

antigen

A/An __________ drug is a medication that kills or damages cells.

cytotoxic

A/An __________ is the type of white blood cell that surrounds and kills invading cells.

macrophage

Rod-shaped, spore-forming bacteria are known as __________ .

bacilli

Spiral-shaped bacteria that have flexible walls and are capable of movement are known as __________ .

spirochetes

A/An __________ agent slows or stops the growth of bacteria.

bacteriostatic

Infectious __________ , which is caused by the Epstein-Barr virus,is characterized by fever, a sore throat, and enlarged lymph nodes.

mononucleosis

Herpes __________ , also known as shingles, is an acute viral infection characterized by painful skin eruptions that follow the underlying route of an inflamed nerve.

zoster

Specialized white blood cells that patrol the body searching for antigens that produce infections are known as __________ cells. These cells grab, swallow, and internally break apart the captured antigen.

dendritic

A/An __________ tumor is not life threatening and does not recur.

benign

A/An __________ is a malignant tumor that occurs in epithelial tissue.

carcinoma

A/An __________ is a malignant tumor that arises from connective tissue, including hard tissues, soft tissues, and liquid tissues.

sarcoma

Swelling caused by an abnormal accumulation of lymph within the tissues is known as __________

lymphedema

A/An __________ is a large white blood cell that can destroy substances such as cell debris, dust, pollen, and pathogens by the process of phagocytosis.

phagocyte

The group of proteins that normally circulate in the blood in an inactive form and are activated by contact with nonspecific antigens such as foreign blood cells or bacteria are known as __________ .

complement

Medications administered to relieve or prevent symptoms of common allergies are known as __________ .

antihistamines

The human __________ virus is a bloodborne infection in which the virus damages or kills the cells of the immune system.

immunodeficiency