Slide 1Three Domain SystemThe Three-Domain SystemSlide 4Slide 5Slide 6Slide 7Slide 8Slide 9Slide 10Slide 11Slide 12Taxonomic HierarchyThe “Species Definition” Varies By Microbial TypeSlide 16Characteristics Used to Classify ProkaryotesSlide 18Slide 19Slide 20Groups of ProkaryotesReferencesSlide 23Slide 24Spirochetes Long, helical bacteria which swim by spinning like corkscrewsGram negative, facultatively anaerobic rodsGram negative aerobic rods and cocciRickettsias and Chlamydias obligate intracellular parasitesMycoplasmasGram positive cocciEndospore forming bacteriaMycobacteriaSlide 33Archaea (Archaebacteria) Many are morphologically part of the Gram-negative Aerobic Rods and Cocci groupSlide 35Dichotomous KeyTaxonomy and Classification of Microbes (Especially Prokaryotes)• The Three Domains and What Distinguishes Them• Review of Characteristics of Prokaryotes, Eukaryotes, Viruses• The Taxonomic Hierarchy and Species Definitions• Characteristics Used to Classify Prokaryotes• Nine Medically Important Groups of Prokaryotes• Dichotomous Keys and Microbe IdentificationThree Domain System Eubacteria Archaea EucaryaProtistaAnimaliaFungiPlantaeGram positivesGram negativesSpirochetesCyanobacteriaMethanogensHalophilesThermoacidophiles•Circular DNA chromosome•Prokaryotic cell type•Peptidoglycan cell walls•Straight chain phospholipids•Antibiotic sensitive•F-methionine for first aa•Circular DNA chromosome•Prokaryotic cell type•No peptidoglycan in cell walls•Branched chain phospholipids•Antibiotic insensitive•Methionine for first aa• Linear DNA chromosomes• Eukaryotic cell type • Cell walls variable if present• Straight chain phospholipids• Antibiotic insensitive• Methionine for first aaThe Three-Domain SystemFigure 10.1Taxonomy and Classification of Microbes (Especially Prokaryotes)• The Three Domains and What Distinguishes Them• Review of Characteristics of Prokaryotes, Eukaryotes, & Viruses• The Taxonomic Hierarchy and Species Definitions• Characteristics Used to Classify Prokaryotes• Nine Medically Important Groups of Prokaryotes• Dichotomous Keys and Microbe IdentificationBacteria Archaea Protista Animalia Plantae Fungi VirusesCell typeChromo-somesCell wall?Uni/multicellularEnergy sourceExample organismReview Chart of Cell Characteristics Domain Domain Domain EukaryaNon-livingEubacteria Archaea Protista Animalia Plantae Fungi VirusesCell typeChromo-somesCell wall?Uni/multicellularEnergy sourceExample organismReview Chart of Cell Characteristics Domain Domain Domain EukaryaNon-livingprokaryotic prokaryotic eukaryotic eukaryotic eukaryotic eukaryotic no cellsEubacteria Archaea Protista Animalia Plantae Fungi VirusesCell typeChromo-somesCell wall?Uni/multicellularEnergy sourceExample organismReview Chart of Cell Characteristics Domain Domain Domain EukaryaNon-livingprokaryotic prokaryotic eukaryotic eukaryotic eukaryotic eukaryotic no cells1 Circular DNA 1 Circular DNA Linear DNA Linear DNA Linear DNA Linear DNA DNA or in nucleoid in nucleoid in nucleus in nucleus in nucleus in nucleus RNAEubacteria Archaea Protista Animalia Plantae Fungi VirusesCell typeChromo-somesCell wall?Uni/multicellularEnergy sourceExample organismReview Chart of Cell Characteristics Domain Domain Domain EukaryaNon-livingprokaryotic prokaryotic eukaryotic eukaryotic eukaryotic eukaryotic no cells1 Circular DNA 1 Circular DNA Linear DNA Linear DNA Linear DNA Linear DNA DNA or in nucleoid in nucleoid in nucleus in nucleus in nucleus in nucleus RNAyes, most of none or none none yes, of yes, of no murein pseudomurein cellulose chitinEubacteria Archaea Protista Animalia Plantae Fungi VirusesCell typeChromo-somesCell wall?Uni/multicellularEnergy sourceExample organismReview Chart of Cell Characteristics Domain Domain Domain EukaryaNon-livingprokaryotic prokaryotic eukaryotic eukaryotic eukaryotic eukaryotic no cells1 Circular DNA 1 Circular DNA Linear DNA Linear DNA Linear DNA Linear DNA DNA or in nucleoid in nucleoid in nucleus in nucleus in nucleus in nucleus RNAyes, most of none or none none yes, of yes, of no murein pseudomurein cellulose chitin unicellular unicellular unicellular multicellular multicellular uni & multi no cells multicellEubacteria Archaea Protista Animalia Plantae Fungi VirusesCell typeChromo-somesCell wall?Uni/multicellularEnergy sourceExample organismReview Chart of Cell Characteristics Domain Domain Domain EukaryaNon-livingprokaryotic prokaryotic eukaryotic eukaryotic eukaryotic eukaryotic no cells1 Circular DNA 1 Circular DNA Linear DNA Linear DNA Linear DNA Linear DNA DNA or in nucleoid in nucleoid in nucleus in nucleus in nucleus in nucleus RNAyes, most of none or none none yes, of yes, of no murein pseudomurein cellulose chitin unicellular unicellular unicellular multicellular multicellular uni & multi no cellsheterotrophic hetero, chemo heterotrophic heterotrophic autotrophic heterotrophic none chemotrophicautotrophicEubacteria Archaea Protista Animalia Plantae Fungi VirusesCell typeChromo-somesCell wall?Uni/multicellularEnergy sourceExample organismReview Chart of Cell Characteristics Domain Domain Domain EukaryaNon-livingprokaryotic prokaryotic eukaryotic eukaryotic eukaryotic eukaryotic no cells 1 Circular DNA 1 Circular DNA