1. Streptococci are Gram-positive cocci that can be classified based on their hemolysis patterns, serology using the Lancefield system, and clinical syndromes they cause. 2. Group A Streptococcus is the cause of illnesses like pharyngitis, impetigo, and scarlet fever. It produces several virulence factors like M protein, erythrogenic toxins, and streptolysin. 3. Group B Streptococcus can cause neonatal infections and post-partum sepsis. Streptococcus pneumoniae is a common cause of pneumonia, meningitis, sinusitis and otitis media. It has a polysaccharide capsule that is immunogenic

1. STREPTOCOCCI ELIZABETH P. QUILES, M.D., FPASMAP DEPARTMENT OF MICROBIOLOGY OUR LADY OF FATIMA UNIVERSITY COLLEGE OF MEDICINE

5. CLASSIFICATION TABLE Alpha, Gamma S. salivarius, S. sanguis, etc VIRIDANS Alpha S. pneumoniae - -do- S. milleri G Alpha, Beta, Gamma S. milleri F Alpha, Gamma Alpha, Beta, Gamma S. bovis S. faecalis D Beta S. equimilis C Beta, Alpha, Gamma S. agalactiae B Beta S. pyogenes A HEMOLYTIC PATTERN BIOCHEMICAL SEROLOGIC

6. PRESUMPTIVE IDENTIFICATION OF STREPTOCOCCI + - - - - R S Pneumococcus - - - - - R R (var) Viridans - - + + + - - + - - R R R R Grp D S. faecalis S. bovis - - + + - R R S. agalactiae - - - - - S R S. pyogenes Lysis bile Growth Bile NaCl Hydrolysis hippurate esculin Susceptibility A P Organism

19. Strawberry Tongue Impetigo

20. scarlatiniform rash

37. thank you