Download - Cocos Gram Poitivos
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Taller No. 5 Cocos Gram positivos
Dr. Francisco Arocha
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Cocos Gram Positivos
Clasificación: Familia Micrococcaceae:
Staphyloccocus Microccocus Planoccocus
Familia Streptococaceae: Streptoccocus Enterococcus Leuconostoc Gemella Pediococcus Aereococus
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Cocos Gram Positivos
Micrococcaceae
Agrupados en racimos
Catalasa positiva
Colonias pigmentadas
Lisostafina positiva
Streptococcaceae
Agrupados en cadena
Catalasa negativa
Colonias grises
Lisostafina negativa
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Cocos Gram Positivos
Familia MicrococcaceaeGenero StaphylococcusCaracterísticas Generales:
•Agrupados en racimos de uva•Catalasa positivos•Inmóviles•No esporulados•Algunos son capsulados•Producen hemolisina•Flora normal de piel y mucosas•Anaerobios facultativos•Resisten la desecación
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Cocos Gram Positivos
Familia MicrococcaceaeGenero Staphylococcus:ClasificaciónStaphylococcus Coagulasa positiva:Staphylococcus aureus
Staphylococcus Coagulasa negativa:Staphylococcus epidermidisStaphylococcus saprophyticusStaphylococcus haemoliticusStaphylococcus haemoliticusStaphylococcus hominisStaphylococcus sacharolyticus
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Cocos Gram PositivosStaphylococcus aureus:Factores de Virulencia:PeptidoglicanoÁcidos teicoicosProteína ACapsulaCatalasaCoagulasaHialuronidazaLipasaEstafiloquinasaNucleasasBetalactamasas
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Cocos Gram PositivosStaphylococcus aureus:Factores de Virulencia:
Toxinas:
Hemolisina Alfatoxina
Hemolisina Betatoxina
Hemolisina Gammatoxina
Leucocidina
Exfoliatoxina
Toxina del shock toxico 1
Enterotoxina
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Cocos Gram Positivos
Staphylococcus aureus:PATOGENIA
Capacidad de colonización: Fibronectina
Penetración
Diseminación: Capsula y proteína A
Formación del absceso
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Cocos Gram Positivos
Staphylococcus aureus:PATOLOGIASFoliculitisFurúnculosCarbunclosImpétigoHidroadenitis supuradaMastitisInfección de heridasCelulitisSíndrome de la piel EscaldadaSíndrome de Shock toxicoSepticemia
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Fuliculitis
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Furunculo
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carbunclo
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Infección de heridas
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celulitis
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Síndrome de la piel escaldada
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Síndrome de shock toxico
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Cocos Gram Positivos
Staphylococcus aureus:PATOLOGIASEndocarditisPericarditisNeumoníaEmpiemaOsteomielitisArtritis sépticaBursitis sépticaPiomiositisIntoxicación alimentaríaEnfermedad de Kawasaki
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osteomielitis
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osteomielitis
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osteomielitis
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Artritis séptica
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Cocos Gram Positivos
Staphylococcus aureus:Diagnostico de laboratorioCultivo Agar Sangre HumanaBeta hemólisisCatalasa positivaOF Glucosa: FermentativoCoagulasa positiva Manitol positivoFago tipificaciónANTIBIOGRAMA o ANTIBIOTICOGRAMA
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Coloración de Gram
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catalasa
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O-F glucosa
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Cocos Gram Positivos
Staphylococcus aureus:TRATAMIENTO
•Cepas sensibles a la penicilina
•Cepas resistentes a la penicilina (Meticilino sensibles) : Oxacilina
•Cepas resistentes a la Meticilina: VANCOMICINA
•Cepas resistentes a Vancomicina: Linezolid o Streptograminas
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Cocos Gram Positivos
Staphylococcus epidermidis
Características generales:
Flora normal de piel
Coagulasa negativo
Infecciones de prótesis y catéteres
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Cocos Gram Positivos
Staphylococcus epidermidis
Factores de virulencia
•Exopolisacarido: Slime•Delta toxina
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Cocos Gram Positivos
Staphylococcus epidermidisPatologías:Bacteriemia intrahospitalariaEndocarditis de válvula protésicaInfección de catéteres EndovenososInfección de derivación Ventrículo-peritonealPeritonitis asociada a diálisis peritonealOsteomielitisInfección de prótesis articularesInfección neonatalInfección ocularInfección Urinaria
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Cocos Gram Positivos
Staphylococcus epidermidis
Diagnostico de Laboratorio
Coagulasa negativa
Manitol negativo
Novobiocina: Sensible
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coagulasa
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Cocos Gram Positivos
Staphylococcus epidermidis
Tratamiento:
Antibioticograma
•Trimetropin sulfa•Rifanpicina•gentamicina•Vancomicina
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Cocos Gram Positivos
Staphylococcus saprophyticus
•Produce Infecciones urinarias en mujeres embarazadas•Es resistente a la novobiocina•Tratamiento: antibioticograma
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Cocos Gram Positivos
MICROCOCCUS
Se agrupan en pares tétradas o aislados
Colonias pigmentadas
OF GLUCOSA oxidativos o inactivos
Flora normal de piel y mucosas
Produce conjuntivitis, infección de prótesis y catéteres
Tratamiento según sensibilidad
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Cocos Gram Positivos
PREVECION:
No existe vacunas
Lavado de manos
Limpieza de la piel
Eliminación de portadores nasales sanos
Certificado de salud
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Cocos Gram Positivos
FAMILIA ESTREPTOCOCACEAECaracterísticas generales:
Se agrupan en cadenas o pares
Capsula de acido hialuronico
No esporulados
No motiles
Colonias grises pequeñas 0,5 mm
Hemolíticas: α, β, y γ
Catalasa negativos
Anaerobios facultativos
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Cocos Gram Positivos
FAMILIA ESTREPTOCOCACEAEClasificación:
Por la hemólisis
Alfa hemolíticos
Beta hemolíticos
Gamma hemolíticos
Según hidrato de carbono de la pared celular (Dra. Rebeca Lancelfield):
A,B,C,D,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,U,V
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Cocos Gram Positivos
Streptococcus pyogenes Grupo AEstructura
Polisacárido C
Proteína M
Proteína T
Proteína R
Antigeno Capsular
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Cocos Gram PositivosStreptococcus pyogenes Grupo ADeterminantes de patogenicidadAcido lipoteicoico
Proteína M
Factor opacidad del suero
C5a peptidasa
Estreptolisina O
Estreptolisina S
Toxina Eritrogenica
DNAsa
Estreptoquinasa
Lipasa
Amilasa
Neurominidasa
Fosfatasa
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S. pyogenes
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Cocos Gram Positivos
Streptococcus pyogenes Grupo APATOGENIA:
Trasmisión
Colonización
Adherencia
Lesión local (Enzimas)
Liberación de las toxinas
Reacción inmunológica
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Cocos Gram Positivos
Streptococcus pyogenes Grupo APatologías:ImpétigoFaringitisErisipelaPiodermaCelulitisFiebre PuerperalFiebre EscarlatinaMiositis y fascitis necrotizanteSíndrome toxico Estreptocócico
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Impétigo
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Impétigo
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Impétigo
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faringitis
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erisipela
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erisipela
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escarlatina
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Shok toxico Estreptococico
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Cocos Gram Positivos
Streptococcus pyogenes Grupo AEnfermedades posestrptococcica
Fiebre reumática:CarditisArtritisCorea de SyderhamNódulos subcutáneoEritema marginado
Glomérulonefritis
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Cocos Gram Positivos
Streptococcus pyogenes Grupo ADiagnostico de laboratorio:Crecimiento en Agar Sangre de carneroCatalasaTaxo A bacitracinaPruebas serologicasPYR L-pirrolidil beta naftilamida
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PYR
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Cocos Gram Positivos
Streptococcus pyogenes Grupo A
TRATAMIENTO:Penicilina
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Cocos Gram Positivos
Streptococcus pyogenes Grupo A
PREVENCIONPenicilina Benzatinica
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Cocos Gram Positivos
Streptococcus agalactie Grupo BFactores de Virulencia
Factor CAMP
Desoxiribunucleasa
Hialuronidasa
Proteasa
Neuraminidasa
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Cocos Gram Positivos
Streptococcus agalactie Grupo B
Patogenia
Colonización de la vagina (20%)
Invasión de la mucosa del niño
Torrente circulatorio
Sepsis y meningitis
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Cocos Gram Positivos
Streptococcus agalactie Grupo BPATOLOGIASInfección neonatalSepsis pospartoEndometritisInfección urinariaCistitisNeumoníaEndocarditisOsteomielitisInfección de piel y tejidos blandos
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Cocos Gram Positivos
Streptococcus agalactie Grupo B
Diagnostico de laboratorio:
Hidrólisis del hipurato positivo
Factor CAMP
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Test de camp
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Cocos Gram Positivos
Streptococcus agalactie Grupo B
TRATAMIENTOPENICILINA
PREVENCION:
Tratar a las mujeres embarazadas portadoras
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Cocos Gram Positivos
Streptococcus Grupo C y GS equisimile y S. anginosus
Producen faringitis y enfermedades posetreptococcica
Tratamiento: PENICILINA
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Cocos Gram Positivos
Streptococcus Grupo DS. bovis y S. equinusFlora normal de la boca y el colonSon hipurato y biliesculina negativoEndocarditis bacteriana (colonoscopia)Sepsis neonatalInfección urinariaAsociados a Cáncer de Colon
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Cocos Gram Positivos
Streptococcus Grupo ViridansS. mutans, S. salivarium, S. mitis, S. morbillorum, S. sanguisFlora normal de la orofaringeProducen alfa hemólisisEndocarditis bacteriana subagudaCaries dentalNeumoníaSinusitisOtitisInfecciones intraabdominalTratamiento: Penicilina o Ampicilina+ gentamicinaProfilaxis: Penicilina Benzatinica
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Cocos Gram Positivos
Streptococcus Grupo Viridans
Diagnostico:
Biliesculina negativo
Solubilidad en bilis positivo
Caldo salado negativo
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Biliesculina negativo
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Solubilidad en bilis
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Caldo salado NaCL 6,5%
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S. mutans
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endocarditis
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endocarditis
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endocarditis
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endocarditis
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endocarditis
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Cocos Gram Positivos
Streptococcus pneumoniaeEstructuraCapsula polisacárida 85 tiposAntigeno F: acido lipoteicoicoAntigeno MAntigeno RProteína A
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S. pneumoniae
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Cocos Gram Positivos
Streptococcus pneumoniaeFactores de virulencia:CapsulaLamininaColagenasa ivProteasa de IgAPermeasaHemolisina O: alfa hemólisisPrincipio productor de púrpuraNeuraminidasaElastasaAutolisina
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Cocos Gram Positivos
Streptococcus pneumoniaePatogeniaColonización de la orofaringeAlteración de las barrera de defensa naturalesMicroaspiracionesInfección pulmonar
acumulación de liquido y PMNacumulación de eritrocitosresolución y cicatrización
Bacteriemia
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Cocos Gram Positivos
Streptococcus pneumoniae
Patologías:
Neumonía lobar
Otitis media
Mastoiditis y Sinusitis
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neumonía
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neumonía
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empiema
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mastoiditis
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Cocos Gram Positivos
Streptococcus pneumoniaePatologías:Extrapulmonar:MeningitisEndocarditisEndoftalmitisArtritisPeritonitis primariaSepsis
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endoftalmitis
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Artritis séptica
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Cocos Gram Positivos
Streptococcus pneumoniaeDiagnostico de Laboratorio:Alfa hemólisis en Agar Sangre HumanaFrotisTaxo P OptoquinaSolubilidad en bilisReacción de QuellungElectroforesis
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Gram de esputo
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Taxo p
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Solubilidad en bilis
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Cocos Gram Positivos
Streptococcus pneumoniae
Tratamiento:Penicilina
Cefalosporina de tercera generación
Vancomicina
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Cocos Gram Positivos
ENTEROCOCCUSFlora normal del intestino delgado y el colon
Son resistentes a la penicilina
Crece en caldo salado al 6,5%
Hipurato positivo
Bilis esculina positivo
Alfahemoliticos o no hemolíticos
Producen: Endocarditis subaguda, infecciones urinarias, abscesos intraabdominales, peritonitis terciaria, celulitis, infección de heridas quirúrgicas, ulcera diabética, meningitis, neumonía nosocomial, infección de catéteres.
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Caldo salado positivo
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Biliesculina positivo
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Cocos Gram Positivos
ENTEROCOCCUSEspecies:
E. faecalis
E. faecium
E. durans
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Enteroccocus faecalis
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TRATAMIENTO
Resistente: penicilina y cefalosporina (BETALACTAMASAS)
Sensible: Vancomicina. Clindamicina, Carbapenem+Gentamicina
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