Streptococcus pneumoniae

Streptococcus pneumoniae, also known as pneumococcus, is a Gram-positive bacteria that resides normally inside the nasopharynx of healthy carriers.

In people with a compromised immune system, S. pneumoniae can become pathogenic and cause pneumococcal infections including but not limited to typical pneumonia, meningitis, bronchitis, and conjunctivitis.