Anaerobic Gramnegative rods

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Anaerobic Gram-negative rods

• In direct smears and in culture

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Bacteroides fragilis

• Pleomorphic relatively small Gram-negative rods
  from a culture on blood agar (Gram stain).

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Bacteroides fragilis

• Pleomorphic relatively small Gram-negative rods
  from a culture on blood agar (Gram stain).

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Bacteroides fragilis

• Gram-negative rods in pus from an anaerobic
  abcess (Gram stain).

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Campylobacter jejuni

• Very small comma-shaped micro-aerophilic bacteria
  from a faeces culture, sometimes forming short
  chains (Gram stain).

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Campylobacter jejuni

• Very small comma-shaped micro-aerophilic bacteria
  from a faeces culture, sometimes forming short
  chains (Gram stain).

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Campylobacter jejuni

• Small comma-shaped micro-aerophilic bacteria from
  a faeces culture (Gram stain).

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Campylobacter jejuni

• Comma-shaped bacteria from a faeces culture. When
  forming short chains these micro-aerophilic
  bacteria resemble spirochaetes (Gram stain).

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Campylobacter jejuni

• Comma-shaped bacteria from a blood culture. When
  forming short chains these micro-aerophilic
  bacteria resemble spirochaetes (Gram stain).

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Fusobacterium necrophorum

• (Previously Sphaerophorus fundiliformis).
  Pleomor-phic Gram-negative rods with typical
  swellings in culture (Gram stain).

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Fusobacterium nucleatum

• Slender long Gram-negative rods from a culture on
  blood agar (Gram stain).

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Helicobacter pylori

• Curved Gram-negative rods in a biopsy from the
  stomach (Silver nitrate stain).

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Leptotrichia buccalis

• Huge tapered bacilli from a culture on blood agar
  (Gram stain).

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Mobiluncus curtisii

• The smallest of the two Mobiluncus spp. with
  typical claw-like Gram-negative curved rods, here
  from a culture (Gram stain).

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Mobiluncus mulieris

• The largest of the two Mobiluncus spp. shows
  typical Gram-negative curved rods, here from a
  cervical swab (Gram stain).

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