<unk>  is a genus of gram-positive (plural ) or spherical bacteria that belongs to the family<unk> tococcaceae, within the order Lactobacillales (lactic acid bacteria), in the phylum Bacillota. Cell division in<unk> tococci occurs along a single axis, so as they grow, they tend to form pairs or chains that may appear bent or twisted. This differs from staphylococci, which divide along multiple axes, thereby generating irregular, grape-like clusters of cells. Most<unk> tococci are oxidase-negative and catalase-negative, and many are facultative anaerobes (capable of growth both aerobically and anaerobically). The term was coined in 1877 by Viennese surgeon Albert Theodor Billroth (1829–1894), by combining the prefix<unk> to-" (from ), together with the suffix "-coccus" (from Modern , from .) In 1984, many bacteria formerly grouped in the genus<unk>  were separated out into the genera Enterococcus and Lactococcus. Currently, over 50 species are recognised in this genus. This genus has been found to be part of the salivary microbiome.
Streptococcus
Enterococcus
Staphylococcus aureus
Lactobacillus
Legionella
Corynebacterium
Actinobacillus
Caulobacter