Yes. It's been proven. As with all other means of exposure to these bacteria, it all depends on the state of the person's health as to when and if they get sick, but they have been exposed to it.
articles.mercola.com/sites/articles/archive/2012/02/05/dr-dietrich-klinghardt-on-lyme-disease.aspxrense.com/general94/provenlym.htmAnd the one that clenches it:
www.sciencedirect.com/science/article/pii/S0944501313001717People actually have good reason to be afraid and disturbed by this.