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TAXONOMY > LESSON 5.2 [A] > Flashcards

LESSON 5.2 [A] Flashcards

1
Q

is a class of several medically, ecologically and scientifically important groups of bacteria such as Enterobacteriacease, Vibrionaceae, and Pseuomonadaceae

A

Gammaproteobacteria

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2
Q

Largest and most diverse class of proteobacteria; more than 1500 charaterized species among its 15 orders; include many well known human pathogens, developed quickly in laboratory media and found various habitats

A

Gammaproteobacteria

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3
Q

homogenous phylogenetic group within gamma proteobacteria; facultative aerobic, gram negative, non sporulating rods

A

Enterobacterales (Enteric bacteria)

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4
Q

found in the intsestinal tract of humans and warm-blooded animals; plays a potential nutrional role by synthesizing vitamins, particularly vitamin K

A

E.coli

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5
Q

wild type strains exhibit minimal growth-factor requirements; can grow on a wide variety of carbon and energy sources

A

E. coli

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6
Q

major cause of urinary tract infections in women; can cause severe foodborne diseases; infection occurs via consumption of contaminated foods or water

A

Pathogenecity of E.coli

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7
Q

what is the relationship between salmonella and escherichia ?

A

closely related; salmonella are predominantly pathogenic, whereas Escherichia species have diverse roles.

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8
Q

Key genera in enterobacteriales

A

Enterobacter, Escherichia, Klebsiella, Proteus, Salmonella, Serratia, Shigella

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9
Q

species that are typically pathogenic to humans and warm blooded animals; eg. raw egg; became famous in peanut butter skippy; common diseasess are thypoid fever and gastroenteritis in humans

A

Salmonella

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10
Q

Shigella is genetically closely related to Escherichia, _______ in similarity; show _______ between the two genes

A

80%, Horizontal gene transfer

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11
Q

species that are typically pathogenic to humans causing severe gastroenteritis known as bacillary dysentery

A

SHigella

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12
Q

one species of shigella that are transmitted through cpntaminated food and water, produces endotoxin, and neurotoxin leading to acute gastrointestinal dstress; majority are acquired from uncooked food

A

Shigella dysenteriae

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13
Q

difference bteween E. coli and Salmonella in colony morphology

A
  1. E.coli has red pigmentation; lactose negative like colonies with gas formation from glucose
  2. Salmonella is lactose negative without gas formation
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14
Q

Highly motile cells that produce urease enzyme, meaning urease positive; distant relationship to e.coli

A

Proteus

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15
Q

colony morphology of proteus

A

edge cells are more rapidly motile than central ccells, its shape is like scales of fish because they are motile

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16
Q

The genera under Enterobacteriales undergo __________

A

butaneidol fermentation

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17
Q

Butanediol fermenters are more ______ than to mixed-acid fermenters

A

closely related to each other

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18
Q

a butanediol fermenter that is commonly found in watr, sewage, and the intestinal tract of warmblooded animals; occasionally causes urinary tract infections

A

enterobacter aerogenes

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19
Q

it commonly found in soild and water; occasionally causes pneumonia in humans; nosocomial and opportunistic causing harm to humans

A

Klebsiella

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20
Q

it produces pigment called red pyrrole or also known as prooigiosins;commonly found in watr, soil, gut of insects and vertebrates and occasionally in human intestines

A

Serratia

21
Q

is a pathogenic bacteria that causes infections in various body sites and contaminates inravenous fluid

A

Serratia macescens

22
Q

exclusively chemoorganotrophic with respiratory metabolisms; most are aerobic, oxidase, and catalase positive, with some capable of anaerobic respiration using nitrate; utlize a wide rnge of organic compounds as carbon and energy sources; ubiquiotius in soil and aquatic systems

A

Pseudomonadales

23
Q

they are gram-negative, polarly flagellated aerobic rods, capable of using diverse carbon sources; considered within the order Pseudomonadales

A

Pseudomonads

24
Q

colny morphology of P. aeruginosa in routine blood agar

A

gray-white with a yellowish tint through green to red or brown

25
Q

the pigment production of P. aeurginosa is better visible and more profound on _________

A

Mueller-Hinton agar

26
Q

Encapsulated starins of P. aeruginosa usually isolated from patients with pneumonia produce ________

A

large mucoid colonies.

27
Q

Pathogenic species of Pseudomonads

A

P. aeruginosa and P. syringae

28
Q

opportunistic pathogen associated with urinary and respiratory tract infections in humans; resiatnt to many antibiotics due to R-plamsid; can cause systemic infections particulalry in individuals with extensive skin damage or cystic fibrosis

A

P. aeruginosa

29
Q

well known plant-pathogens causing various disease synptoms in host plants; isolted leaves from showing chlorotic lesiosn; In humans P. aeruginosa causes diseases whereas in plants, it is_______

A

Pseudomonas syringae

30
Q

what is the genera of pseudomonadales

A

pseudomonads

31
Q

genera if vibrionales

A

aliiivibrio and Vibrio

32
Q

facultative aerobic rods and curved rods; employ fermentative metabolism; oxidase positive

A

vibrionales

33
Q

vibrio species are oxidase______ whereas enteric bacteria are oxidase _______

A

positive, negative

34
Q

several species of vibrionales exhibit ______

A

bioluminescence

35
Q

Pathogenicity of Vibrionales

A
  1. Vibrio cholerae
  2. Vibrio parahaemolyticus
36
Q

causes cholera in humans, primarily trasmitted via water; common in developing countries

A

Vibrio cholerae

37
Q

major causes off gastroentritis, especially in japan because they frequently eat seafood such as raw fishes; associated with consumption of fish

A

vibrio parahaemolyticus

38
Q

when using Thiosulfate citrate bile salts sucrose agar, vibrio cholerae has _______ or margin while vibrio parahemolyticus _________formation

A

yellow, do not have this

39
Q

enterobacterales are oxidase-_____ and catalase-_____

A

oxidase-negative, catalase positive

40
Q

Metabolic characteristic of Enterobacteriales

A
  1. Produce acid from glucose
  2. Reduce nitrate to nitrite
  3. Ferment sugars to various end products.
41
Q

fermentation patterns in enteric bacteria

A
  1. mixed acid fermentation
  2. 2,3 butaneidol fermentation
42
Q

three significant acids in mixed acid fermentation

A
  1. acetic
  2. lactic
  3. succinic
43
Q

products of mixed acid fermentation

A

ethanol, co2, and h2

44
Q

main products of 2,3-butanediol fementation

A

butaneidol, etahnol, co2, and H2

45
Q

CO2 and H2 Production of mixed acid fermentation

A

equal amounts of co2 and h2

46
Q

CO2 and H2 Production of butanediol fermentation

A

more co2 than h2

47
Q

genera in butanediol fermentation

A

Enterobacter, Klebsiella, Erwinia, and Serratia

48
Q

Genera in Mixed acid fermentation

A

Escherchia,, Salmonella, Shigella, Citrobacter, Proteus, and Yersinia

TAXONOMY (4 decks)

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