Can it be safe for provider to use a makeup brush after micro needling?

After a micro needling procedure the provider apply powder mineral makeup with a brush....is the safe/sanitary??? I'm extremely worried, I can't see how a procedure of this nature which causes bleeding can use te same makeup brush on people with open wounds?! Thanks for any feedback! The brush was sanitized in between users, they stated, but I don't know of any way this can be done safely...I'm very worried...