Table 1.

Definitions of Commonly Used Terminology for Describing Gastrointestinal Diseases Affecting the Common Marmoset

Term	Definition
Acute	Sudden or abrupt onset with short duration or course (0–14 d); may be more severe, self-limiting, or responsive to short-term medical treatment
Chronic	Consistent (≥50%) or continually recurs over long duration (>14 d), requiring multiple treatments or continual medical treatment
Intermittent	Occurs at intervals or alternating periods of normal and abnormal, not continuous, self-limiting or responsive to short-term medical treatment but returns after period of time
GI malabsorption	Poor or decreased uptake or incorporation of nutrients by GI tract due to intestinal inflammation or other disease process
IBD	Group of disorders characterized by chronic inflammation of GI tract
CLE	Type of IBD in the marmoset requiring histologic diagnosis, defined by villous blunting and fusion, crypt hyperplasia, and expansion of lamina propria due to many lymphocytes
Emesis/vomiting	Expulsion of material from stomach and/or intestinal tract through mouth
Hematochezia	Expulsion of fresh or frank blood from anus or presence of frank blood associated with feces
Melena	Dark, sticky feces containing digested blood
Mucoid	Contains viscous, slippery substance consisting of mucus (mucin, water, salts)
Metabolic bone disease	Group of disorders resulting in remodeling of bone tissue (eg, osteopenia, fibrous osteodystrophy, rickets)
Hepatomegaly	Enlargement of liver or liver tissue, clinically diagnosed by palpation of liver tissue extending beyond margins of costal arch
Thin	Body condition score ≤2.0 and/or weight ≤325 g
Obese	Body condition score ≥4.0 and/or weight ≥450 g

CLE = chronic lymphocytic enteritis; GI = gastrointestinal; IBD = inflammatory bowel disease.