Streptococcus
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Streptococcus is a genus of gram-positive spherical bacteria that belongs to the family Streptococcaceae, within the order Lactobacillales, in the phylum Bacillota. Cell division in streptococci occur
Streptococci
Alpha-hemolytic S. viridans (right) and beta-hemolytic S. pyogenes (left) streptococci growing on blood agar
Staphylococcus
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Staphylococcus is a genus of Gram-positive, spherical bacteria in the family Staphylococcaceae. Cells occur singly, in pairs, tetrads, short chains, and characteristically in irregular, grape-like clu
Streptococcus
…in streptococci occurs along a single axis, thus when growing they tend to form pairs or chains, which may appear bent or twisted. This differs from staphylococci, which divide along multiple axes, thereby generating irregular, grape-like clusters of cells. Most streptococci are oxidase-negative and catalase-negative…
Staphylococcus aureus 01
Gram-stained cells of an unidentified Staphylococcus species; numbered scale divisions are 11 μm apart