Veterinary Drug Handbook (VDH) is the reference veterinarians turn to when they want an independent source of information on the drugs that are used in veterinary medicine today.


Albino

An animal that is completely white because it lacks the ability to make pigment. Its eyes are pale blue or pink....

 

Agglutination

Clumping together. An abnormal clumping of red blood cells. Often seen in patients with immune-mediated anemia. An abnormal clumping of red blood cells. Often seen in patients with immune-mediated anemia....

 

Aerobic

Needing oxygen to live. See also anaerobic....

 

Adsorbent

Solid substance which attracts other molecules to its surface....

 

Adrenergic

Communication between the nerves and muscles that uses epinephrine as the 'messenger'. Adrenergic stimulation is what is involved in the 'flight or fight' response, which means the body is alerted to a danger of some sort and prepares to basically run or fight. Adrenergic stimulation results in an...

 

Adrenal Glands

Two small glands near the kidneys that produce many hormones required for life....

 

Adjuvant

A substance added to killed vaccines to stimulate a better immune response by the body. Common adjuvants contain aluminum compounds. A component added to killed vaccines to increase the ability of the vaccine to stimulate an immune response....

 

Addisons disease, Addisonian

Addison's disease is also known as hypoadrenocorticism. It is a disease that results from a decrease in corticosteroid secretion from the adrenal gland. See article: Addison's Disease (Hypoadrenocorticism)...

 

Acute

The sudden onset of signs of disease. Single or short term exposure to a poison. Usually results in clinical signs and/or death....

 

Active Immunity

Immunity produced when an animal's own immune system reacts to a stimulus e.g., a virus or bacteria, and produces antibodies and cells which will protect it from the disease caused by the bacteria or virus. Compare with 'passive immunity'....

 

ACTH

Adrenocorticotropic hormone. A hormone, secreted by the pituitary gland, which stimulates the adrenal gland to work....

 

Acid

A fluid containing a high proportion of hydrogen ions, giving the liquid a sour taste. Measured by pH units, with 1 the most acid, and 14 the least acid. Chemical reactions in the body have to take place at or near neutrality, pH 7....