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
Staphylococcus aureus 01
Gram-stained cells of an unidentified Staphylococcus species; numbered scale divisions are 11 μm apart
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
Staphylococcus
…species. Many species also tolerate elevated salt concentrations. In the laboratory, catalase activity is commonly used to distinguish staphylococci from streptococci and enterococci. Coagulase and other biochemical reactions can then assist with species identification. Closely related species may require molecular…
Streptococci
Alpha-hemolytic S. viridans (right) and beta-hemolytic S. pyogenes (left) streptococci growing on blood agar