Illustrating Streptococcus pneumoniae
According to the WHO, Streptococcus pneumoniae (also known as pneumococcus) is the fourth most frequent microbial cause of fatal infection. These bacteria commonly colonize the upper respiratory tract and are the most common cause of bacterial pneumonia and meningitis. Although much is known about pneumococcal biology and the diseases it causes, there are still many questions about the molecular biology and cellular processes of the bacterium.