Bacterial Pathogens Images Gallary

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Gram Positive Organisms

Aerobic, Gram-positive cocci

  • Staphylococcus aureus (fig 1,2, 3, 4)
  • Staphylococcus spp. (Coagulase-negative)(fig 1)
  • Streptococcus pneumoniae (Viridans group)(fig 1, 2, 3, 4)
  • Streptococcus agalactiae (group B)(fig 1)
  • Streptococcus pyogenes (group A)(fig 1, 2)
  • Enterococcus spp.(fig 1, 2)

Aerobic, Gram-positive rods

  • Bacillus anthracis (fig 1, 2)
  • Bacillus cereus (fig 1)
  • Lactobacillus spp. (fig 1)
  • Listeria monocytogenes (fig 1)
  • Nocardia spp. (fig 1, 2)
  • Rhodococcus equi (fig 1)
  • Erysipelothrix rhusiopathiae (fig 1)
  • Corynebacterium diptheriae (fig 1,2)
  • Propionibacterium acnes (fig 1, 2)

Anaerobic, Gram-positive rods

  • Actinomyces spp. (fig 1)
  • Clostridium botulinum (fig 1)
  • Clostridium difficile (fig 1, 2)
  • Clostridium perfringens (fig 1, 2, 3)
  • Clostridium tetani (fig 1)

Anaerobic, Gram-positive cocci

  • Peptostreptococcus spp. (fig 1)

 

Gram Negative Organisms

Aerobic, Gram-negative cocci

  • Neisseria gonorrhoeae (fig 1, 2, 3, 4, 5)

  • Neisseria meningitidis (fig 1)

  • Moraxella catarrhalis (fig 1)

Anaerobic, Gram-negative cocci

  • Veillonella spp. (fig 1)

Aerobic, Gram-negative rods

  • Fastidious, Gram-negative rods
    • Actinobacillus actinomycetemcomitans (fig 1)
    • Bordetella pertussis (fig 1)
    • Brucella spp. (fig 1, 2)
    • Campylobacter spp. (fig 1, 2)
    • Capnocytophaga sp. (fig 1)
    • Cardiobacterium hominis (fig 1)
    • Eikenella corrodens (fig 1)
    • Francisella tularensis (fig 1)
    • Haemophilus ducreyi (fig 1, 2)
    • Haemophilus influenzae (fig 1, 2, 3)
    • Helicobacter pylori (fig 1, 2, 3, 4)
    • Kingella kingii (fig 1)
    • Legionella pneumophila (fig 1, 2)
    • Pasteurella multocida (fig 1)
  • Enterobacteriaceae (glucose-fermenting Gram-negative rods)
    • Citrobacter spp. (fig 1)
    • Enterobacter spp. (fig 1)
    • Escherichia coli (fig 1, 2, 3)
    • Klebsiella pneumoniae (fig 1)
    • Proteus spp. (fig 1)
    • Salmonella enteriditis (fig 1)
    • Salmonella typhi (fig 1)
    • Serratia marcescens (fig 1)
    • Shigella spp. (fig 1)
    • Yersinia enterocolitica (fig 1)
    • Yersinia pestis (fig 1)
  • Oxidase-positive, glucose-fermenting Gram-negative rods
    • Aeromonas spp. (fig 1)
    • Plesiomonas shigelloides (fig 1)
    • Vibrio cholerae (fig 1)
    • Vibrio parahemolyticus (fig 1)
    • Vibrio vulnificus (fig 1)
  • Glucose-nonfermenting, Gram-negative rods
    • Acinetobacter spp. (fig 1)
    • Flavobacterium meningosepticum (fig 1)
    • Pseudomonas aeruginosa (fig 1)
    • Burkholderia cepacia (fig 1)
    • Burkholderia pseudomallei (fig 1)
    • Xanthomonas maltophilia (fig 1)

Anaerobic, Gram-negative rods

  • Bacteroides fragilis (fig 1)
  • Bacteroides spp. (fig 1)
  • Prevotella spp. (fig 1)
  • Fusobacterium

 

Bacteria which cannot or are difficult to Gram stain

  • Borrelia burgdorferi (fig 1, 2, 3, 4)
  • Borrelia recurrentis (fig 1)
  • Bartonella spp. (fig 1)
  • Chlamydia trachomatis (fig 1)
  • Calymmatobacterium granulomatis (Gram negative rod)(fig 1)
  • Coxiella burnetii (fig 1)
  • Ehrlichia spp. (fig 1, 2)
  • Legionella spp. (fig 1)
  • Leptospira spp.(fig 1)
  • Mycobacterium spp.(fig 1, 2)
  • Mycobacterium tuberculosis (fig 1, 2)
  • Mycobacterium avium-intracellulare (fig 1)
  • Mycobacterium leprae (fig 1, for a close up )
  • Rickettsia spp.(fig 1)
  • Treponema pallidum(fig 1, 2)

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