Method Monkeys infected with SHIV underwent digestive endoscopic examination at the state of anesthesia.The duodenal biopsy specimens was fixed and stained with HE staining.

• 方法SHIV感染恒河猴，消化内镜检查并进行活检取材，对活检标本进行固定，石蜡包埋，常规HE染色镜检。