Lysis of rbc alpha and gamma bad organism

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Unformatted text preview: ) BAD ORGANISM: STREPTOCOCCUS PYOGENES: STREP THROAT, LOOK FOR BETA HEMOLYSIS AND SMALL COLONIES Streptococcus sp.: Cell wall components & hemolysins Hemolysins: Beta hemolysis/Alpha/Gamma Cell wall: Lancefield scheme ('serotypes') Group • Pyogenes CW ABCFG Species eg S. pyogenes Hemolysin ß Character strep throat imetigo rheumatic fever SYSTEMIC INFECTION • Viridans not gpd S. mutans • Enterococci D S. fecalis (Enterococcus) caries CALLED VIRIDANS, PRODUCES A GREY ZONE OF AGAR PLATE. STREP MUTANS ,ß GI tract or none INDICATOR ORGANISM IN THE UNITED KINGDOM WATER TEST IS S. FAECALIS, IN THE US IS IS E. COLI. IT IS A BETTER ORGANISM IN MARINE ENVIRONMENTS • Lactic LACTIC ACID BACTERIA. N • Pneumococcus-- S. cremoris S. pneumoniae STREP PNEUMONIA, CAUSES PNEUMONIA IN HUMANS FOUND IN CRAMPED LIVING CONDITIONS, TREATABLE WITH Pneumococcus) ( ANTIBIOTICS none fermentations none pneumonia • Group A streps: ~Streptococcus pyogenes – Streptokinase/Streptodornase/Hyaluronidase/Erythroge nic toxin/Hemolysins/M protein TYPICAL SMALL COLONIES WITH BETA HEMOLYTIC ZONES. STREPTO MORPHOLOGY. PRODUCE A LOT OF VIRULENCE FACTORS SUCH AS KINASE, DEGRADE DNA; HYALURONIC ACID IS THE GLUE THAT HOLDS CELLS TOGETHER— ENZ CAN BE PRODUCED TO DEGRADE THIS. T ERYTHROGENIC TOXINS, PRODUCES SCARLET FEVER M PROTEIN THIS IS AN EXAMPLE OF COLONY PROGRESSION AND SUCCESSION S. SALIVARIUS ACTINOMYCES S. MUTANS S. MUTANS HAS RECEPTORS THAT INTERACT WITH SURFACE OF ACTINOMYCES. STREP MUTANS IS NOT THE CAUSE OF CAVITIES. CAN TAKE SUCROSE (FRUCTOSE AND GLUCOSE =DISACCHARIDE), TAKES GLUCOSE IN AND IT STORES FRUCTOSE ON THE OUTSIDE. GLUCOSE GOES ON INSIDE OF CELLS, THEN IT IS POLYMERIZED. FRUCTOSE ON OTUSIDE FORMS CAPSULE ON OUTSIDE OF COLONY AND PRODUCES LACTIC ACID WHICH EATS AWAY AT ENAMEL AND CAUSES CAVITIES Dental plaque Text DENTAL PLAQUE CAN BE STAINED, IF TOOTH SURFACE BECOMES COLONIZED WITH STREPTOCOCUS MUTANS, DISEASE CAN FOLLOW. TOOTH SURFACE IS COVERED WITH ENAMEL THAT PROTECTS TISSUE. SEQ OF EVENTS: STREPTO SALIVARI...
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