Magnetic resonance imaging findings. T2-weighted images of the brain (axial section; A, B) and knee joint (sagittal section; C, D) were scanned and compared between the test group and the control group macaques using the TSE sequence. The presentative images of two animals, a control macaque with the ID of 102902C (A, C) and a test macaque with the ID of 092604C (B, D), are shown. There is no evidence of encephalitis, arthritis-associated joint destruction, or other abnormality in either animal.