I guess I was lucky, once I did a thorough cleaning and moved the litter box to a different room, I never had problems with Emily again. But I am very careful to make sure to scoop every day and ensure that her drinking water is changed at least twice a day.

You should start to notice a difference with the anti-biotics within 48 hours. If there hasn't been ANY improvement within 5 days contact the vet again, you might need something else.

Good luck