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
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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
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