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Cocos Gram positivos

Cocos Gram positivos. Escarlatina: lengua aframbuesada. Cocos. (microscopio electrónico). Cocos. Microcopía electrónica. Streptococcus. Streptococcus pneumoniae en Gram de expectoración. Cocos. Microscopía electrónica. Cocos Gram positivos en frotis de expectoración.

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Cocos Gram positivos

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  1. Cocos Gram positivos

  2. Escarlatina: lengua aframbuesada

  3. Cocos. (microscopio electrónico)

  4. Cocos. Microcopía electrónica

  5. Streptococcus

  6. Streptococcus pneumoniae en Gram de expectoración

  7. Cocos. Microscopía electrónica

  8. Cocos Gram positivos en frotis de expectoración

  9. Cocos Gram positivos en cadenas

  10. Neumococo en frotis de expectoración. Diplos y cadenas cortas.

  11. Escarlatina. Exantema rugoso.

  12. Reacción exfoliativa luego de infección estreptocóccica

  13. Escarlatina. Eritema rugoso

  14. MICs Oxacillin Susceptible Oxacillin Intermediate Oxacillin Resistant S. aureus <2 g/ml no intermediate MIC >4 g/ml CoNS <0.25 g/ml no intermediate MIC >0.5 g/ml Zone sizes Oxacillin Susceptible Oxacillin Intermediate Oxacillin Resistant S. aureus >13 mm 11-12 mm <10 mm CoNS >18 mm no intermediate zone <17 mm Puntos de corte (breakpoints) de MIC y disco-difusión para oxacilina frente a S. aureus y frente a Staphylococcus coagulasa negativos (CoNS)

  15. How is the mecA gene involved in the mechanism of resistance?Staphylococcal resistance to oxacillin/methicillin occurs when an isolate carries an altered penicillin-binding protein, PBP2a, which is encoded by the mecAgene. The alteration of the penicillin-binding protein does not allow the drug to bind well to the bacterial cell, causing resistance to -lactam antimicrobial agents.

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