Atrioventricular Block, First Degree Basic Information Definition Delayed conduction of the supraventricular impulse at the level of the atrioventricular (AV) node, resulting in a prolonged PQ interval. Synonym(s) First-degree AV…
Aflatoxin Toxicosis Basic Information Definition Aflatoxins are hepatotoxic mycotoxins (mold toxins) produced by various Aspergillus spp. and other fungi, most commonly A. flavus and A. parasiticus. Aflatoxin can contaminate a…
Aminoglycoside Toxicosis Basic Information Definition The aminoglycosides are large molecules with numerous amino acid groups, making them basic polycations that are highly ionized at physiologic pHs. These physical properties are…
Adrenal Insufficiency, Relative Basic Information Definition Relative adrenal insufficiency (RAI) is a condition in which the adrenal gland, notably the adrenal cortex, is unable to respond (ie, secrete cortisol) to…
Anagen/Telogen Defluxion Basic Information Definition • Telogen defluxion is hair loss associated with the telogen phase (resting phase) of hair growth. • Anagen defluxion is the loss of hair during…
Actinobacillosis Basic Information Definition • Actinobacillus spp. is a gram-negative group of bacteria that causes a variety of clinical syndromes in horses. • Actinobacillus equuli subsp. equuli • Actinobacillus equuli…
Anaphylaxis Basic Information Definition A life-threatening acute immediate hypersensitivity reaction occurring as a result of the rapid release of inflammatory mediators from mast cells. Affected horses may develop acute respiratory…
Algal Toxicosis Basic Information Definition Acute intoxication of the liver (microcystin) or central nervous system (anatoxins) subsequent to algal toxin exposure Synonym(s) • Microcystin toxicosis • Anatoxin-a toxicosis • Blue-green…
Amyloidosis Basic Information Definition Progressive systemic or cutaneous disease resulting from excessive deposition of insoluble protein polymers known as amyloid in various organs, especially the kidneys. This leads to progressive…
Aggressive Stallion Behavior Basic Information Definition • Aggressive behavior is defined as the overt display of dangerous reactions that may endanger people or other animals. • Aggressive behavior by the…
