Domain Bacteria. BIO 220 Microbiology Jackson Community College
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1 Domain Bacteria BIO 220 Microbiology Jackson Community College John Ireland, Ph.D. 2006
2 Scientific Nomenclature Domain - Bacteria Phylum Important for gross characteristics Class Intermediate characteristics Order Can be useful in splitting the G-G apart Family not going to be considered here Genus First part of binomial name Species Second part of binomial name
3 Dichotomous Keys Designed to allow simple characteristics to split apart genera into identifiable groups.
4 Phylum Proteobacteria Gram-negative Chemoheterotrophic Divided into five Classes α-proteobacteria β-proteobacteria γ-proteobacteria δ-proteobacteria ε-proteobacteria
5 α-proteobacteria Most capable of growing on low levels of food Order Rickettsiales Ehrlichia Rickettsia Order Rhizobiales Bartonella Brucella
6 Ehrlichia and Rickettsia Wall-less less intracellular pathogens Ehrlichia species in cell R. rickettsii in cells
7 Bartonella and Brucella Bartonella lesion Brucella abortus
8 β-proteobacteria Order Burkholderiales Burkholderia Bordetella Order Neisseriales Neisseria
9 Burkholderia and Bordetella Bordetella pertussis coccobacilli Burkholderia cepacia on plate
10 Neisseria Gram-negative diplococci
11 γ-proteobacteria Largest Class in Phylum Order Thiotrichales Francisella Order Legionellales Legionella Coxiella Order Pseudomonadales Moraxella Pseudomonas Order Vibrionales Vibrio Order Enterobacteriales Order Pasteurellales Hemophilus Pasteurella
12 Francisella Possible bioweapon,, with a very low infectious dose. Fracisella tularenis bacterium in tissue sample
13 Legionella and Coxiella Intracellular pathogens Legionella pneumophila in cell Coxiella brunetti in cell
14 Moraxella and Pseudomonas Pseudomonas are among the bacteria with the most diverse collection of carbon sources used
15 Vibrio Common in aquatic systems and responsible for huge outbreaks in poor sanitation.
16 Enterobacteriales Enteric (intestinal) microorganisms Citrobacter Enterobacter Escherichia Klebsiella Proteus Salmonella Serratia Shigella Yersinia
17 Haemophilus and Pasteurella Haemophilus on chocolate agar Pasteurella multicoda
18 δ-proteobacteria Order Bdellovibrionales Bdellovibrio Interesting due to its predation of other bacteria
19 ε-proteobacteria Order Campylobacterales Campylobacter Helicobacter
20 Phylum Firmicutes Gram-positive Low percentage G/C in genomes Concerned with Four Orders Order Clostridiales Order Mycoplasmatales Order Bacillales Order Lactobacillales
21 Order Clostridiales Clostridium Anaerobic, bacillus, endospore-former
22 Order Mycoplasmatales Mycoplasma Wall-less less pleomorphic bacteria
23 Order Bacillales Bacillus (Aerobic endospore-forming bacilli) Listeria (Intracellular pathogens) Staphylococcus (High resistance to antibiotics)
24 Order Lactobacillales Enterococcus (Hardy, resistant organism) Streptococcus (Heavy toxin producer) Lactobacillus (Commensal to humans)
25 Phylum Actinobacteria Gram-positive High G/C content in genome Order Actionmycetales Actinomyces Corynebacterium Gardnerella Mycobacterium Norcardia Streptomyces Propionibacterium
26 Actinomyces Facultative anaerobe found in the mouth
27 Corynebacterium Highly pleomorphic bacteria
28 Gardnerella Gram-variable and pleomorphic
29 Mycobacterium Contain mycolic acids that disrupt staining Long growth time required
30 Nocardia Pathogenic species contain mycolic acids and form filaments.
31 Streptomyces Prolific producer of antibiotics Produces aerial filaments Nearly 500 identified species
32 Propionibacterium Produces propionic acid, used to make Swiss Cheese.
33 Phylum Chlamydiae Two Genera Chlamydia Chlamydiophila Both have complex life cycles Both produce elementary bodies
34 Phylum Spirochaetes Spiral morphology Numerous Pathogens present Genera Borriela Leptospira Treponema
35 Phylum Bacteroidetes Genus: Bacteriodes Heavily contaminates feces (over 10 9 /g) Commonly causes peritoneum infections post- surgery
36 Phylum Fusobacteria Genus: Fusobacterium Distinct pointy-end morphology Common in dental abscesses
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