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Bacto > brucella > Flashcards

brucella Flashcards

1
Q

brucella species

A 
b melitensis
b abortus
b suis
b ovis
b canis
b neotomae
b ceti
b pinnipedialis
b microti
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2
Q

b melitensis how many biotypes

A

3

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3
Q

b melitensis host species

A

sheep goat

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4
Q

b abortus host species

A

cattle

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5
Q

b suis host species

A

swine, wild boars,
wild hare
reindeer
rodents

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6
Q

b ovis host species

A

sheep, goat

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7
Q

b canis host species

A

dog

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8
Q

b neotomae host species

A

desert rat

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9
Q

b ceti host species

A

dolphin, whale

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10
Q

b pinnipedialis host species

A

sea dog, walrus

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11
Q

b microti host species

A

common vole

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12
Q

brucella habitat

A

infected host - obligate pathogen

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13
Q

brucella morphology

A

coccoid rods
no flagella
no spore

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14
Q

staining

A

Gr-

koster

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15
Q

are brucella fastidious

A

yes

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16
Q

culture

A

5-15% CO2

inc time 48hrs

17
Q

brucella selective culture

A

polymyxin, bacitracin, cycloheximide

18
Q

which species have S-R colonies

A

b melitensis
b abortus
b suis

19
Q

which species have only R colonies

A

B ovis

B canis

20
Q

brucella catalase

A

pos

21
Q

brucella oxidase

A

pos

22
Q

brucella OF

A

oxidative

23
Q

brucella urease

A

pos, except b ovis

24
Q

brucella antigens

A

A and M polysaccharides in the cell wall

25
Q

which brucella species have cross reactions

A

b ovis and b canis

b melitensis and b abortus and b suis

26
Q

brucella groups by species

A

susceptibility to phages, oxidative metabolism, natural host

27
Q

brucella biotype groups

A

CO2 demand, H2S production, fuchsin/thionin tolerance, agglutination

28
Q

brucella resistance

A

fair

29
Q

what happens to brucella above 60degrees and under pH4

A

they die - pasteurisation of milk

30
Q

how long can brucella survive in lymph nodes and parenchymal organs

A

3weeks

31
Q

how long can brucella survive in cooled sweet milk

A

30 days

32
Q

how long can brucella survive in chorion, shaded and cool enviro

A

1-2months

33
Q

which brucella species is the only one that doesnt infect humans

A

b ovis

Bacto (19 decks)

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