Fungus is peanuts compared to other stuff you can pick up at those places:
http://www.nbcnews.com/id/12866053/ns/health-womens_health/t/family-sues-salon-over-death-after-pedicure/
http://health.usnews.com/health-news/health-wellness/articles/2014/07/28/health-risks-lurking-at-the-nail-salon