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Micros 244 > Beta, Delta, Gamma, Epsilon Proteobacteria > Flashcards

Beta, Delta, Gamma, Epsilon Proteobacteria Flashcards

1
Q

Where do Proteobacteria source substrates from?

A

anaerobe zones in habitats

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2
Q

Gram stain of Proteobacteria

A

negative
pink

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3
Q

4 Orders of Class Betaproteobacteria

A

Neisseriales
Burkholderiales
Nitrosomonadales
Hydrogenophilales

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4
Q

Neisseria

A
  • non-motile
  • aerobe
  • cocci
  • capsules and pili
  • chemoorganotrophic
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5
Q

Where is Neisseria found?

A

mucous membranes of mammals

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6
Q

Burkholderia

A
  • aerobe
  • mesophilic
  • straight rods
  • polar flagella
  • catalase and oxidase +
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7
Q

Burkholderia cepacia

A
  • mineralize organic materials
  • plant pathogen
  • hospital infects
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8
Q

Genus Bordetella

A
  • related to Burkholdelia
  • aerobe
  • coccobacilli
  • chemoorganotrophs
  • organic sulfur and nitrogen for growth
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9
Q

Bordetella pertussis

A
  • non-motile capsule
  • infects human epithelial cells of respiratory tract
  • pertussis (whooping cough)
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10
Q

Bordetella bronchiseptica

A
  • motile
  • coccobacilli
  • kennel cough in dogs
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11
Q

Nitrosomonadaceae

A
  • Nitrosomonas
  • Nitrosococcus
  • Nitrosospira
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12
Q

Thiobacillus (Hydro)

A
  • chemolithotrophs
  • colourless sulphur bacteria
  • not photosynthetic
  • oxygen as electron acceptor
  • acid-mine draining
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13
Q

Thiobacillus denitrificans

A
  • electron DONORS: hydrogen sulfide, thiosulfate, ferrous iron for ETC
  • electron ACCEPTOR: oxygen or nitrate
  • DENITRIFICATION: nitrate to nitrogen gas
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14
Q

4 Orders of Class Gammaproteobacteria

A
  • Purple Sulfur bacteria
  • Pseudomonadales
  • Vibrionales
  • Enterobacteriales
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15
Q

Purple Sulfur Bacteria

A
  • Anoxygenic photosynthesis
  • electron DONORS: HS or H2
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16
Q

Pseudomonas

A
  • straight/slightly curved rods
  • motile
  • aerobe
  • chemoheterotroph
  • CAC cycle
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17
Q

Impact of Pseudomonadales

A
  • mineralize organic molecules
  • plant pathogens and opportunistic human pathogens
  • food decay (P.fluorescens)
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18
Q

Vibrionaceae

A
  • straight or curved rods
  • motile
  • D-glucose as only carbon and energy source
19
Q

Vibrio cholerae

A

faecal transmitted, water-borne pathogen

20
Q

Vibrio fischeri

A

biolumination

21
Q

Enterobacteriaceae

A

distinguished from other Gram-negative rods by the ABSENCE of oxidase

22
Q

Genera witihin Enterobacteriaceae

A
  • Escherichia
  • Shigella
  • Salmonella
  • Enterobacter
  • Serratia
23
Q

Mixed Acid Fermentation

A

Proteus, Escherichia, Salmonella, Shigella
lactic acid, acetic acid, succinate, formic acid (CO2 and H2) ,ethanol

24
Q

Butanediol Fermentation

A

Klebsiella, Enterobacter, Erwinia, Serratia
butanediol, ethanol, CO2

25
Q

Beta-hemolysis

A
  • complete lysis on blood agar
  • clear zone
  • E.coli, Streptococcus pyogenes
26
Q

Impact of Enterobacteriales

A
  • E.coli in colon
  • fecal contamination of water
  • normally part of human intestinal tract
27
Q

E.coli Pathotypes (diarrheagenic)

A
  • associated with diarrhoea
  • Shiga toxin-producing E.coli
  • Enterotoxigenic E.coli
  • Enteroinvasive E.coli
  • Enteropathogenic E.coli
  • Enteroaggregative E.coli
  • Diffuse adherent E.coli
28
Q

Salmonella (Enterobacteriales)

A

gastric fever and gastroenteritis
food-borne or sewage

29
Q

Shigella (Enterobacteriales)

A

bacillary dysentery

30
Q

Klebsiella (Enterobacteriales)

A

pneumonia

31
Q

Yersinia (Enterobacteriales)

A

plague, spread by fleas

32
Q

Erwinia (Enterobacteriales)

A

plant disease

33
Q

3 Orders of Class Deltaproteobacteria

A

chemoorganotrophs
- Desulfovibrionales
- Bdellovibrionales
- Myxococcales

34
Q

Desulfovibrionales

A

recycle sulfur
occur in sediments

35
Q

Desulfovibrionales Energy Production

A
  • anaerobic conditions
  • drive ATP synthase
36
Q

Bdellovibrio

A
  • aerobe
  • curved rods
  • thick polar flagella
  • predatory organism to Gram- neg bacteria
  • beneficial to humans
37
Q

Bdellovibrio Life Cycle

A
  1. non-growing predatory: swims into prey, penetrates cell wall with enzymes
  2. intracellular reproductive phase: periplasm, uses cellular components of prey
38
Q

Myxococcales

A
  • aerobe
  • rods
  • life-cycle with fruiting bodies and dormant myxospores
39
Q

Myxococcales Digestion

A

food PRESENT:
- antibiotics and digestive enzymes that lyse bacteria and yeast

food SCARCE:
- aggregate
- fruiting body formed
- dormant myxospore developed (sporangiola)

40
Q

Class Epsilonproteobacteria

A

rods

41
Q

Campylobacter (Epsilon)

A

both pathogenic and non-pathogenic

42
Q

Campylobacter fetus (Epsilon)

A
  • abortions in sheep and cattle
  • septicaemia and enteritis in humans
43
Q

Helicobacter pylori (Epsilon)

A
  • gastritis and peptic ulcers
  • survive the acidic stomach environment
  • overproduction of urease

Micros 244 (15 decks)

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