67.Genus Brucella (antigens, resistance, typing, subtyping). Characterisation of S-type Brucella species. Flashcards Preview

Bacto specific oral > 67.Genus Brucella (antigens, resistance, typing, subtyping). Characterisation of S-type Brucella species. > Flashcards

Flashcards in 67.Genus Brucella (antigens, resistance, typing, subtyping). Characterisation of S-type Brucella species. Deck (8)
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1
Q

S colonies:

A

S colonies: B. melitensis, B. abortus, B. suis

2
Q

Antigens?

A

Antigens: • lipopolysaccharide, peptides, lipids • close antigen relationship • „S colony type”: • B. melitensis - B. abortus - B. suis cross reaction • A and M polysaccharides: B. melitensis - B. abortus - B. suis • „R colony type”: • B. ovis - B. canis cross reaction

3
Q

Resistance?

A

Resistance:

  • medium
  • highly susceptible to acidic pH
  • inctivated in fermented dairy products and meat
  • 30-day-long survival in non-fermented dairy products
  • 30-day-long survival in bedding
4
Q

Species

A

species:

  • phage susceptibility (Tbilisi phage)
  • oxidative metabolism,
  • natural host
  • genome structure
5
Q

Biotype

A

biotype:

  • CO2 demand,
  • H2S,
  • fuchsin/thionin tolerance,
  • agglutination (A-M-R)
6
Q

Pathogenicity

A

Pathogenicity: • species, hosts

• B. melitensis: goat, sheep, cattle, human

  • B. abortus: cattle, sheep, human
  • B. suis: swine (biotypes 1-3), hare (biotype 2), reindeer (biotype 4), rodents (biotype 5)
  • B. pinnipedialis: seal, walrus

• B. ceti: whale, dolphin

B.ovis sheep

• B. canis: dog,

• B. neotomae: desert rat

• B. microti: vole

7
Q

Pathogenicity 2?

A

Pathogenicity: • facultative intra cellular bacterium • survives within macrophages • diseases • generalised diseases • acute • abortion • epididymitis, orchitis • subacute • arthritis, bursitis, tenosynovitis

8
Q
A

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