Saran's Learn Microbiology

 DIFFERENCE BETWEEN Staphylococcus sp. AND Streptococcus sp. S.No Characteristics Staphylococcus sp. Streptococcus sp. 1 Arrangement Grape like cluster Chain like arrangement 2 Cell division Binary fission occurs in various directions (Multiple axes). Binary fission occurs in one linear direction (Single axis). 3 Catalase test Positive Negative 4 Enriched media Does not need Enriched media (Non-fastidious). Need Enriched media (Fastidious). 5 Habitat Found in Skin. Found in Respiratory tract. 6 Number of species 40 Species. 50 Species. 7 Hemolysis No hemolysis or Beta hemolysis Alpha or Beta or Gamma hemolysis. 8 Path...

 Streptococcus pneumoniae VIRIDANS Streptococcus ·        Viridans Streptococci are a heterogeneous group of α -hemolytic and non-hemolytic Streptococci . ·   Viridans Streptococci is the normal flora of the Oropharynx, Respiratory tract and Gastrointestinal tract of infants, children and adults. ·        Their group name is derived from viridis (Latin for “green”), a reflection of the fact that many of these bacteria produce a Green pigment on Blood agar media. ·        More than 30 species and sub-species have been identified under Viridans Streptococci . ·        Streptococcus pneumoniae is the most virulent member of the Viridans group. ·    Other Viridans Streptococci can be differentiated from  Streptococcus pneumoniae  using an Optochin test and Capsule. Other Viridans Streptococci are Optochin resistant and they also...