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Actinomyces and NocardiaActinomyces and Nocardia
Chapter 24Chapter 24
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教学大纲教学大纲掌握:放线菌属的形态染色、硫磺掌握:放线菌属的形态染色、硫磺样颗粒。样颗粒。
熟悉:放线菌的致病性、与龋齿和熟悉:放线菌的致病性、与龋齿和牙周炎关系。牙周炎关系。
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ActinomycesActinomyces
A. israeli,A. israeli, A. naeslundii; A. naeslundii; GG++ AnaerobicAnaerobic, form filament, , form filament,
Exhibit true branchingExhibit true branching Related to decay tooth and Related to decay tooth and
peridentitis peridentitis
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Clinical specimens : Actinomycosis-pusClinical specimens : Actinomycosis-pus
Sulfur granule is visibleSulfur granule is visible
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Sections or Sections or tabletting : tabletting : chrysanthemum-like chrysanthemum-like appearanceappearance
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Opportunist organism, component of Opportunist organism, component of oral flora (endogenous)oral flora (endogenous)
Take advantage of injury toTake advantage of injury to penetrate penetrate mucosal barriersmucosal barriers TraumaTrauma SurgerySurgery
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ActinomycosisActinomycosis A chronic suppurative and A chronic suppurative and
granulomatous disease of the granulomatous disease of the cervico-cervico-facial, thoracic or abdominalfacial, thoracic or abdominal areas areas
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Pus contains "Sulfur Granules"Pus contains "Sulfur Granules" yellow – orangeyellow – orange Composed of mineralized “mycelial” massComposed of mineralized “mycelial” mass Colony of bacteriaColony of bacteria
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sulfur granulesulfur granule
Form Form burrowing sinusburrowing sinus tracts to skin or tracts to skin or mucus membranes——mucus membranes——
Discharge purulent materialDischarge purulent material
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Pulmonary Pulmonary ActinomycosisActinomycosis
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NocardiosisNocardiosis
G+, rod G+, rod ,, weakly weakly acid-fastacid-fast N. asteroides; N. brasiliensisN. asteroides; N. brasiliensis Subcutaneous infections, pulmonary Subcutaneous infections, pulmonary
infections, and brain abscessesinfections, and brain abscesses
nocardianocardia
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Subcutaneous infectionsSubcutaneous infections
pulmonary infectionspulmonary infections
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MycetomaMycetoma((足分枝菌病)足分枝菌病)
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Features of actinomycetesFeatures of actinomycetesActinomyces:Actinomyces: branching bacilli, branching bacilli,
non-acid fastness, anaerobic, non-acid fastness, anaerobic,
oral ,intestinal ,oral ,intestinal ,endogenous floraendogenous flora,,
chronic cellulitis, draining sinuseschronic cellulitis, draining sinuses
Nocardia: branching bacilli ,Nocardia: branching bacilli ,weak acid weak acid
fastfast, aerobic, , aerobic, soil (exogenoussoil (exogenous ) , ) ,
pseumonia ,skin pustules ,pseumonia ,skin pustules ,
brain abscess brain abscess
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summarysummary
Actinomyces :stain ,clinical Actinomyces :stain ,clinical feature, diseasefeature, disease
Nocardia: stain, diseaseNocardia: stain, disease