I could see it being a combination of the Katrina aftermath and crystal meth use. Makes sense that there would be an increase at this time.
I have a friend who has had several I&Ds. I finally asked him what soap he used. He was only using stuff like Ivory and Dove. Well, when you've got a nasty staph wound draining down your arm and chest, don't you think some Dial might be a good idea? I suggested he switch. He hated the Dial because it was so drying and has switched back to the Ivory and Dove. He continues to have wounds.