M.B.
You can buy the mold test kits at Lowe's and Home Depot to determine the level of airborne mold that can cause health problems, which can be many. You can also buy a more expensive kit (several hundred dollars) that you use to collect samples when you vaccuum. Here's the info on this test by a doctor that has pioneered a treatment prootocl for patients exposed to mold: http://www.biotoxin.info/MoldTesting
Bry-Jo Roofing and remodeling is experienced in mold remediation (Note: we did not use these folks for the remediation because we were too dumb at the time to know the importance, but I have spoken to the owner of this company and they have done alot of work on my own home for other things). It is very important that any remediation be done properly and you should be aware that doing it improperly can dramatically increase your family's exposure to mold toxins.
There are actually 3 ways in which mold causes health problems: 1. allergic reactions 2. colonization of the fungus in your body (systemic and organ specific) 3. the toxins produced by the mold are minute and can impact the brain (and thus the nervous system, which is why they're call "neurotoxins"). My family was severely impacted by mold from a roof leak and a plumbing leak. I would recommend your family not be in the house when any work is being done and don't return to the home until after you've repeated the mold tests IF the amounts are found to be above normal. Some folks will tell you that the health concerns are over-rated, but what they don't realize is that 25% of the population has the genes to be made very ill from mold as their bodies don't properly recognize the toxins and thus don't eliminate the toxins.
Like the doctor (Shoemaker) in the link above for the mold test kit, I have no financial interest in any of these companies, I just want to make sure that no one elses families have the severe health impacts my own family had from mold exposure.