What type of bacteria is characterized as spherical and can cause diseases such as pneumonia?

The correct answer identifies diplococci, which are a type of bacteria that appear as pairs of spherical cells. This morphological characteristic is important because the arrangement of bacterial cells can influence their identification and the diseases they cause. Diplococci, in particular, are known for being responsible for certain infections, including pneumonia and gonorrhea. Their shape and grouping as pairs help differentiate them from other forms of bacteria.

In contrast, staphylococci are clusters of spherical bacteria, bacilli are rod-shaped bacteria, and spirilla are spiral-shaped. Each type has distinct properties and implications for the types of infections they may cause, but only diplococci have the specific pairing that links them closely with diseases like pneumonia. By understanding these classifications, it becomes easier to connect bacterial structures to their potential impacts on health.