Yes we used to be treated regularly for parasites when I was young, other countries treat for parasites regularly. In the USA people get offended if you say parasites like having them means your a dirty person. Lice gets you a rep for being dirty, but being clean or dirty has nothing to do with it. If you pet your pets, you probably picked up something. I worked as a waitress for many years and got lice 3 times from customers. My boss and I did an interview and she wondered why I didn't ask anything, and I told her she has lice so bad I could see them moving around. We both got lice.