Interesting chapter. Icheb still appears to be holding back, despite (or because) everything that's happened in the past 24-hours has been centered largely on him. He'd better fish or cut bait, because if he's hiding something it's going to look bad if Bashir discovers it first.
Bashir's his customary clever self, and I enjoyed seeing him weighing the potential medical benefits of Icheb's DNA re-sequencing. The captain was obviously uncomfortable with the necessity of having Icheb wear Bashir's device, but it was clearly a must if Icheb is to continue in his post as XO.