Cell Structure

Cell Structure

source: http://images.fineartamerica.com/images-medium-large/2-streptococcus-pneumoniae-bacteria-roger-harris.jpg

Streptococcus pneumoniae have a round coccus shape, and are often found as diplococci as seen in the picture. They have a polysaccharide capsule which protects them from immune system detection. Streptococcus pneumoniae have pili that help them adhere to the respiratory tract, and prevent them from being expelled by coughing.

Source: https://microbewiki.kenyon.edu/index.php/Streptococcus_pneumoniae