Lecture 11: The Prokaryotes: Domains Bacteria & Archaea Flashcards

1
Q

What are proteobacteria?

A

Gram-negative, chemehetertrophic bacteria that possess a specific rRNA sequence

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2
Q

What are the 5 classes of proteobacteria?

A
  1. Alphaproteobacteria
  2. betaproteobacteria
  3. gammaproteobacteria
  4. deltaproteobacteria
    5.epsilonproteobacteria
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3
Q

What are common characteristics of alphaproteobacteria?

A
  • grow w/ very low levels nutrients
  • some have stalks or buds called prosthecae
  • include agriculturally important bacteria
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4
Q

What is the difference between Pelagibacter, Ehrlichia, Rhizobium, Bartonella, and Brucella?

A

Pelagibacter: one of most abundant microorganisms
Ehrlichia: transmitted by ticks; infection in canines
Rhizobium: fix nitrogren in roots
bartonella: cat scratch disease
Brucella: obligate parasite of mammals

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5
Q

What is notable about betaproteobacteria?

A

play a role in nitrogen fixation

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6
Q

What are the differences between burkholderia, bordetella, neisseria?

A

burkholderia: b. pseudomallei-causes meliodosis in humans
bordetella: B.pertussis- causes whooping cough
neisseria: N.gonnorheae & N.meningitis (explanatory)

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7
Q

What is notable about gammaproteobacteria?

A

generally have different shapes, include free living bacteria

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8
Q

What is the difference between francisella, Pseudomonadales, Legionella, V. Cholerae, V. parahaemolyticus, Enterobacteriales, E.coli, and Salmonella?

A

francisella: F. tularensis- causes tularemia
Pseudomonadales: pseudomonas - opportunistic pathogens
Legionella: causes pneumonia
V. cholera: causes cholera
V. parahaemolyticus: causes gastroenteritis
Enterobacteriales: enterics; inhabit intestinal tract; cause uti
E.coli: indicator of fecal contamination
salmonella: 2,500 serovars

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8
Q

What is the difference between shigella, klebsiella, serratia, yersinia, and haemophilus?

A

shigella: causes baccilary dysentery
klebsiella: K. pneumoniae causes pneumonia
serratia: produces red pigment; cause of nosocomial infections
yersinia: y. pestis causes plague
haemophilus: H. influenza causes meningitis (does NOT cause influenza)

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9
Q

What is unique about Deltaproteobacteria?

A

include bacteria that are predators on other gram-neg bacteria
important to sulfer cycle

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10
Q

What is the differences between Bdellvibrio, Desulfovibrio, & Myxococcals?

A

Bdell: attack other gram-neg bacteria
Desu: found in anaerobic tract
Myxococcals: form fruiting body containing myxospores

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11
Q

What are the differences between these epsilonproteobacteria: campylobacter & helicobacter?

A

Campy: common bacterial cause of diarrheal illness
Helico: causes stomach cancer (H. pylori)

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