It wouldn't surprise me. There are a lot of things that bad nail salons do, that's just one of them. They often use MMA in the acrylics (illegal in most countries), refil good CND bottles with generic product, do not clean their brushes or change towels on the tables. No wonder people get fungal infections.
Just remember when you're looking for a nail salon -recommendations are best & that you usually get what you pay for (eg don't be enticed by cheap prices).