Ultrasonographic appearance and measurement of abdominal structures in healthy Capuchin monkeys (Sapajus spp.)

Background: Previous ultrasonographic studies of Sapajus apella to determine the normal anatomy and physiology are incomplete. The aim of this study was to determine normal ultrasonographic appearance and measurements of all abdominal organs and structures of interest.

Methods: Twelve adult monkeys were recruited considered healthy on the basis of history, physical examination, and general blood work. To avoid additional anesthesia, the ultrasonographic examinations were performed during routine screening, annually scheduled by the Unit of Cognitive Primatology & Primate Center, CNR-Rome, where the animals were housed. Ultrasound data were processed offline by two experienced ultrasonographers.

Results: Topography, morphology and echostructure were described for almost all organs and descriptive statistics were provided.

Conclusion: To the author's knowledge, this is the most complete ultrasonographic study in Capuchin monkeys.