Bacteria that are round in appearance are called coccus bacteria. Different types of coccus bacteria are-
(i) Micrococcus : Spherical bacteria are called Micrococcus if they are isolated or isolated. For example, Micrococcus denitrificans, Micrococcus aureus, Micrococcus flavus.
(ii) Diplococcus : Spherical bacteria in pairs or pairs are called diplococcus. For example, Diplococcus pneumonia.
(iii) Streptococcus Streptococcus: Spherical bacteria are called Streptococcus if they are arranged in chains. For example, Treptococcus lactis, Treptococcus strep and Treptococcus pyrogens.
(iv) Tetracoccus : Spherical bacterial cells divided into two different layers and arranged in groups of four are called tetracoccus. Such as Gaffkyacoccus tetragena, Tetracoccus sp.
(v) Staphylococcus : Spherical bacteria clustered together like bunches of grapes are called Staphylococcus. For example, Staphylococcus aureus.
(vi) Sarcina : A certain number of spherical bacterial cells arranged regularly is called Sarcina. For example – Sarcina lutea.