Saran's Learn Microbiology

 Streptococcus agalactiae GENERAL CHARACTERISTICS ·        Gram’s classification – Gram positive bacteria ·        Shape – Spherical (Cocci) ·        Arrangement – Chain form arrangement. ·        Motility – Non-Motile ·        Capsule – Absent ·        Endospores - Absent ·        Respiration – Aerobic/Facultative anaerobic ·        Optimum Temperature - 37 °C ·        Optimum pH – 7.0 ·        Streptococcus type (Lancefield classification) – Group B ·        Habitat – Upper respiratory tract and Genitourinary tract. ·        Discovered by Rebecca Lancefield (American Microbiologist) in 1930 from milk and cows with Bovine mast...

  Streptococcus pyogenes GENERAL CHARACTERISTICS ·        Gram’s classification – Gram positive bacteria ·        Shape – Spherical (Cocci) ·        Arrangement – Chain form often having Diplococcal arrangement. ·        Motility – Non-Motile ·        Capsule – Present (Hyaluronic acid capsule) ·        Endospores - Absent ·        Respiration – Aerobic/Facultative anaerobic ·        Optimum Temperature - 37 °C ·        Optimum pH – 7.3 to 7.4 ·        Streptococcus type (Lancefield classification) – Group A ·        Habitat – Throat and Skin ·        Discovered by Theodor Billroth (Austrian Surgeon) in 1874. PATHOGENICITY OF S...