Afterwards is useless unless you wait 6 months the batryl will negate the results. One week is not long enough to treat RI maybe in mammals but not in reptiles. Mucking about with antibiotics and using them improperly does more harm than good. (resistant strains of bacteria) It is one reason why batryl is not very effective at treating RI anymore there are a huge number of resistant bacteria.

"That which does not kill us makes us stronger" Nietzsche, especially true with bacteria.