Soiled his pants
Song Yan was correct, Cui Deming who was lying on the bed all day long had enough time to think over what went wrong over and over again during one such day when he was thinking about the incident of that night, he realised that it was Song Yan who had duped him —— when Cui Deming realised that he was fooled by Song Yan, his face turned green to white.
What was more this woman was inside the examination room for so long, if she was taking care of those corpses it was impossible for her to leave so many parasitic bugs behind. In fact, if she knew that those corpses were infected by such things, she should have at least warned him that way he would have subconsciously stayed on guard while taking care of those corpses at least he would have let someone else cut and examine those corpses.