Can I get lice from dirty brush at a salon?

Head lice. Less commonly, head lice may be transmitted via such items as: caps, hats and scarves brushes and combs hair decorations, such as barrettes headphones.
It's possible.... ..But unlikely. While it is possible to transmit head lice via a hairbrush, any decent salon cleans its brushes regularly. Any salon that doesn't should not be in business.