1 / 32

Microbial Classification

Microbial Classification. The Prokaryotes: Domains Bacteria and Archaea. One circular chromosome, not in a membrane No histones No organelles Peptidoglycan cell walls Binary fission. Domain Bacteria. Proteobacteria Mythical Greek god, Proteus, who could assume many shapes Gram-negative.

jadon
Télécharger la présentation

Microbial Classification

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Microbial Classification

  2. The Prokaryotes: Domains Bacteria and Archaea • One circular chromosome, not in a membrane • No histones • No organelles • Peptidoglycan cell walls • Binary fission

  3. Domain Bacteria • Proteobacteria • Mythical Greek god, Proteus, who could assume many shapes • Gram-negative

  4. The  (alpha) Proteobacteria • Human pathogens: • Bartonella • B. hensela Cat-scratch disease • Brucella Brucellosis

  5. The  (alpha) Proteobacteria • Obligate intracellular parasites: • Ehrlichia. Tick-borne, ehrlichiosis • Rickettsia. Arthropod-borne, spotted fevers • R. prowazekii Epidemic typhus • R. typhi Endemic murine typhus • R. rickettsii Rocky Mountain Spotted Fever

  6. The  (alpha) Proteobacteria Figure 11.1

  7. The  (alpha) Proteobacteria • Wolbachia. Live in insects and other animals

  8. The  (alpha) Proteobacteria • Have prosthecae: • Caulobacter. Stalked bacteria found in lakes • Hyphomicrobium. Budding bacteria found in lakes Figure 11.2 & 3

  9. The  (alpha) Proteobacteria • Nitrogen-fixing bacteria: • Azospirillum • Grow in soil, using nutrients excreted by plants • Fix nitrogen • Rhizobium • Fix nitrogen in the roots of plants Figure 27.5

  10. The  (alpha) Proteobacteria • Produce acetic acid from ethyl alcohol: • Acetobacter • Gluconobacter

  11. The  (beta) Proteobacteria

  12. The  (beta) Proteobacteria • Thiobacillus • Chemoautotrophic, oxidize sulfur: H2S  SO42– • Sphaerotilus • Chemoheterotophic, form sheaths Figure 11.5

  13. The  (beta) Proteobacteria • Neisseria • Chemoheterotrophic, cocci • N. meningitidis • N. gonorrhoeae • Spirillum • Chemoheterotrophic, helical Figure 11.4 & 6

  14. The  (beta) Proteobacteria • Bordetella • Chemoheterotrophic, rods • B. pertussis • Burkholderia. Nosocomial infections • Zoogloea. Slimy masses in aerobic sewage-treatment processes

  15. The  (gamma) Proteobacteria

  16. The  (gamma) Proteobacteria • Pseudomonadales: • Pseudomonas • Opportunistic pathogens • Metabolically diverse • Polar flagella • Azotobacter and Azomonas. • Nitrogen fixing • Moraxella. • Conjunctivitis Figure 11.7

  17. The  (gamma) Proteobacteria • Legionellales: • Legionella • Found in streams, warm-water pipes, cooling towers • L. pneumophilia • Coxiella • Q fever transmitted via aerosols or milk Figure 24.15b

  18. The  (gamma) Proteobacteria • Vibrionales: • Found in coastal water • Vibrio cholerae causes cholera • V. parahaemolyticus causes gastroenteritis Figure 11.8

  19. The  (gamma) Proteobacteria • The  (gamma) Proteobacteria • Enterobacteriales (enterics): • Peritrichous flagella, facultatively anaerobic • Enterobacter • Erwinia • Escherichia • Klebsiella • Proteus • Salmonella • Serratia • Shigella • Yersinia

  20. The  (delta) Proteobacteria

  21. The  (delta) Proteobacteria • Bdellovibrio. Prey on other bacteria • Desulfovibrionales. Use S instead of O2 as final electron acceptor • Myxococcales. Gliding. Cells aggregate to form myxospores

  22. The  (delta) Proteobacteria Figure 11.10a

  23. The  (delta) Proteobacteria Figure 11.1b

  24. The  (epsilon) Proteobacteria

  25. The  (epsilon) Proteobacteria • Campylobacter • One polar flagellum • Gastroenteritis Figure 11.1a

  26. The  (epsilon) Proteobacteria • Helicobacter • Multiple flagella • Peptic ulcers • Stomach cancer Figure 11.1b

  27. The Nonproteobacteria Gram-Negative Bacteria

  28. Cyanobacteria • Oxygenic photosynthesis • Gliding motility • Fix nitrogen

  29. Purple and Green Photosynthetic Bacteria • Anoxygenic photosynthesis • Purple and green sulfur bacteria light 2H2O + CO2 (CH2O) + H2O + O2 light 2H2S + CO2 (CH2O) + H2O + 2S0

  30. Chlamydiae • C. trachomatis • Trachoma • STD, urethritis • C. pneumoniae • C. psittaci • Causes psittacosis

  31. In Bergey's Manual, Volume 5 Figure 11.22a

  32. In Bergey's Manual, Volume 5 Figure 11.22b

More Related