Staphylococcus can be distinguished from Streptococcus by morphology. While Streptococcus grows in chains, Staphylococcus grows in cultures. Also catalase test is negative in Streptococcus but positive in Staphylococcus. Staphylococcus spp can also be distinguished by response to coagulase test. Only Staphylococcus aureus is positive while the remaining 32 species are negative.