How long does a person with meningitis stay infectious?

Depends on germs. If you have bacterial meningitis and you've been treated for at least 24 hours, you are no longer contagious. A person with viral meningitis may be contagious for 7-10 days after their symptoms first started. Cover your nose/mouth when you sneeze/cough. Avoid spread by washing hands a lot. Don't share spoons, forks, drinking straws, chapsticks, lip glosses/lipsticks.
Contageous. Of the bacterial meningities only meningcoccal menigitis is considered contageous. If you are exposed to a person with meningcoccal meningitis, you should see yoiur doctor immediately since it can be fatal within 24 hours of exposure. Once the patient has received antibiotics for 24-48 hours they are not contageous except for contact with spinal fluid.