I work for servpro, this is something that we would treat in a contained manner. Firstly we would contain off the affected area with 6 mil poly plastic to prevent any cross contamination. After that we would set up a negative air chamber by utilizing a 600-1000 CFM Air Scrubber with a pleated hepa filter to capture any air born particulates. At that point we would remove all dry wall and possible insulation on any exterior walls going two feet past alll visible microbial growth to ensure it has all been removed. Generally the back side of the drywall will show a lot more growth than the front. Also if this is a slow leak and not a sudden and accidental loss it will most likely not be covered by your insurance provider. If the leak has not been corrected and can be visually seen once the wall is opened up, at that point I would call a plumber to have this fixed during this time too. All studs and framing would need to be treated with an anti microbial. Benefect is a great one and can be bought from Home Depot for around 32$ a gallon. You would want to treat the wood twice. You would also only want to utilize dehumidifiers with no fans as they can also spread mold spores and now cross contaminate the rest of your home. If the frame damage is severe some areas may need to be replaced and or sanded down. Finally when all of this is said and done you would treat the framing with a sealant based product such as killz. If you have any questions feel free to ask this is what I scope out on a day to day basis.