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Vet. Bacteriology > Bacillus > Flashcards

Bacillus Flashcards

1
Q

Bacillus is a spore forming Bb T/F

A

T

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2
Q

The habitat of spores are diseased animals T/F

A

F habitat of vegetative Bb

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3
Q

describe morphology of bacillus

A

4-5 micrometer rod with a central spore

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4
Q

Bacillus is a flagellated Bb T/F

A

F

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5
Q

falgella is the essentail virulaence factor in bacillus T/F

A

F the capsule is

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6
Q

Resistance of Bacillus is weak T/F

A

F it’s fair can survive in a carcass for several days
56°c for several minutes
the spore can survive for up to 50 y !
in boiling it can survive up to 10 minutes

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7
Q

Capsule production is dependent on what

A

CO2

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8
Q

R-S Colonies are dependent on what

A

CO2

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9
Q

You should quickly open the carcass after the animal has deceased T/F

A

F do not open the carcass

depending on the temperature you need to wait up to 3 days

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10
Q

What temp. is needed for spore formation

A

15°c

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11
Q

B. anthracis is a haemolytic Bb T/F

A

F only B.cereus is capable of haemolysis

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12
Q

Oxidase?

Catalase?

A

O -

C +

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13
Q

What is the ascoli test good for

A

detection of B anthracis

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14
Q

Which cross reactions are important

A

B cereus - B anthracis

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15
Q

How is the ascoli test performed

A

normal saline + 2 organ samples + acetic acid

-boil - filter - 1-2 drops of Ag - check for precipitation ring

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16
Q

Name all the B. species

A
  • B.subtillis
  • B. megaterium
  • B. cereus
  • B. licheniformis
  • B. thuringiensis
  • Paenibacillus (B.) polymyxa
  • Geobacillus (B.) stearothermophilus
  • Paenibacillus larvae
17
Q

Describe the disease caused by B.anthracis

A

-Ro,Ov - acute/peracute septicaemic anthrax

18
Q

Pigs get very lethal Anthrax T/F

A

F high mortality is not common

19
Q

Birds are very susceptible to Anthrax T/F

A

F Birds are completely resistant

20
Q

B.anthracis is a obligate aerobic Bb T/F

A

F facultative aerobic

21
Q

What is needed for spore formation

A

O2

22
Q

What symptoms do humans show with B.anthracis

A

skin, pulmonary and intestinal form of anthrax

23
Q

How do carnivores handle anthrax

A

they are comparatively resistant

24
Q

B. subtillis, B.cereus and B. megaterium are flagellated Bb T/F

A

T

25
Q

What kind of Bb is B.anthracis in regards to pathogenicity

A

obligate pathogen

26
Q

What can B.cereus cause

A

human Gi infect, sporadic abortions of cattle

27
Q

What can Paenibacillus larvae cause

A

american foulbrood of honey bees

28
Q

How can you differentiate B. anthracis from B. cereus

A

B.cereus is capapble of haemolysis and has flagella

29
Q

How can you differentiate B.anthracis from B.megaterium

A

B.megaterium can produce capsules

Vet. Bacteriology (12 decks)

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