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Non-Sporeforming Anaerobes

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lecture 16 - PowerPoint PPT Presentation


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Non-Sporeforming Anaerobes. Non-Sporeforming Anaerobes. Stains gram-variable or gram-negative, but not a gram-negative cell wall. Non-Sporeforming Anaerobes (cont.). Most Common Sites of Anaerobic Infection. Characteristics of Anaerobic Infection.

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slide3

Non-Sporeforming Anaerobes

Stains gram-variable or gram-negative, but not a gram-negative cell wall

slide10

Gram-Positive Non-sporeforming Anaerobes

NOTE:Figure legend in text indicates that each of these organisms is a bacillus (i.e., rod-shaped). This is INCORRECT. Peptostreptococcus is, as the name indicates, a coccus.

slide12

Gram Stain and Macroscopic Colonies of Actinomyces

NOTE:Molar tooth appearance of colonies on agar can help remind us that the oral cavity is a common niche for Actinomyces.

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Cervicofacial Actinomycosis

NOTE:Sinus tract originating in oral cavity has made it’s way to the surface at the jawline.

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Broad Classes of Virulence Factors Associated with Gram-Neg. Anaerobes

  • Adhesins
  • Protection from:
      • Oxygen toxicity
      • Phagocytosis
  • Tissue Destruction
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[1]

[5]

[3]

[4]

[2]

[6]

[8]

[7]

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MIXED

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LIVE

LIVE

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SUBUNIT

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Bacteroides Pathogenicity

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REVIEW

Non-Sporeforming Anaerobes

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Review of Anaerobic Gram-Positive Non-Sporeforming Bacterial Infections

REVIEW

slide43

Review of Anaerobic Gram-Negative Non-SporeformingBacterial Infections

REVIEW

slide47

Broad Classes of Virulence Factors Associated with Gram-Neg. Anaerobes

  • Adhesins
  • Protection from:
      • Oxygen toxicity
      • Phagocytosis
  • Tissue Destruction

REVIEW

slide52

MIXED

[1]

[5]

[3]

[4]

[2]

[6]

[8]

[7]

MIXED

+

MIXED

+

LIVE

LIVE

DEAD

SUBUNIT

SUBUNIT

Bacteroides Pathogenicity

REVIEW

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