Another rare, uncommon complication is when the spleen becomes enlarged and ruptures. Fortunately, this happens to only about 1 or 2 people per 1,000 people with mono and it usually happens within the 4th to 21st day of the illness. Mono is not spread through casual contact, so your roommate isn't at any greater of a risk of contracting mono than other people on campus. It is not a highly contagious disease, and it does not require quarantine. Meningitis is usually caused by a viral or bacterial infection.
Bacterial meningitis can be quite severe.
Early diagnosis and treatment are VERY important. If symptoms occur, you should see a doctor immediately. It is not spread by casual contact or by breathing the air where a person with meningitis has been. There are vaccinations against some strains of meningitis. These injections are available through the Student Medical Center.