vitamin-b-12 and Monkey-Diseases

Chronic diarrhea poses a significant threat to the health of NHP research colonies, and its primary etiology remains unclear. In macaques, the clinical presentation of intractable diarrhea and weight loss that are accompanied by inflammatory infiltrates within the gastrointestinal tract closely resembles inflammatory bowel disease of humans, dogs, and cats, in which low serum and tissue cobalamin (vitamin B12) levels are due to intestinal malabsorption. We therefore hypothesized that macaques with chronic idiopathic diarrhea (CID) have lower serum cobalamin concentrations than do healthy macaques. Here we measured serum cobalamin concentrations in both rhesus and pigtailed macaques with CID and compared them with those of healthy controls. Serum cobalamin levels were 2.5-fold lower in pigtailed macaques with CID than control animals but did not differ between rhesus macaques with CID and their controls. This finding supports the use of serum cobalamin concentration as an adjunct diagnostic tool in pigtailed macaques that present with clinical symptoms of chronic gastrointestinal disease. This use of serum vitamin B12 levels has implications for the future use of parenteral cobalamin supplementation to improve clinical outcomes in this species.

Topics: Animals; Case-Control Studies; Chronic Disease; Diarrhea; Female; Humans; Inflammatory Bowel Diseases; Macaca mulatta; Macaca nemestrina; Male; Monkey Diseases; Reference Values; Species Specificity; Vitamin B 12

Topics: Abortion, Veterinary; Animals; Female; Ferritins; Fetal Death; Hemoglobins; Iron; Macaca fascicularis; Monkey Diseases; Pregnancy; Progesterone; Transferrin; Ultrasonography, Prenatal; Vitamin B 12

Topics: Animals; Demyelinating Diseases; Diet; Female; Haplorhini; Macaca; Macrophages; Male; Monkey Diseases; Nerve Degeneration; Neurofibrils; Papio; Peripheral Nervous System Diseases; Pregnancy; Ranvier's Nodes; Sciatic Nerve; Tibial Nerve; Vitamin B 12; Vitamin B 12 Deficiency

Topics: Animals; Brain; Demyelinating Diseases; Diet; Erythrocyte Count; Haplorhini; Hematocrit; Hemoglobins; Macaca; Monkey Diseases; Nerve Degeneration; Nervous System; Papio; Paralysis; Peripheral Nerves; Spinal Cord; Vitamin B 12; Vitamin B 12 Deficiency

Topics: Animals; Diet; Haplorhini; Monkey Diseases; Nerve Degeneration; Vitamin B 12; Vitamin B 12 Deficiency