I used to own a 1997 Salem TT and 2 and a half years ago it got flooded due to toilet lever got stock or something like that. Got flooded the whole night and most of the gfci power outlet wasn't work...
I am not an expert on mold but I (my opinion) is you were lucky, and flooding usually causes an area to stay damp and this gives the area a chance for the mold to start growing. Yours must have dried out pretty fast.