Topic 28: Asfarviridae (African sweine fever), Hepadnaviridae (Hepar, DNA) –

Question 1

Topic 28: Asfarviridae (African sweine fever), Hepadnaviridae (Hepar, DNA) –”

ASFARVIRIDAE:

Answer 1

• Genus: Asfivirus genus.
• Morphology: Linear dsDNA, enveloped.
• Resistance: Moderate.
• Biological properties:
  Baltimore I
  Hemadsorption.
  Stenoxen.
• Antigenic properties:
  No neutralization antibodies!
  No vaccine available.
• Diagnosis:
  Clinical signs = Classical swine fever – swine experiment.
  Isolation (buffy coat).
  Asfivirurs genus –
  1) African swine fever.

Question 2

Topic 28: Asfarviridae (African sweine fever), Hepadnaviridae (Hepar, DNA) –”

ASFARVIRIDAE:
Short

Answer 2

Asfivirus genus.
Linear dsDNA, enveloped.
Moderate resistance

• Biological properties:
  Baltimore I
  Hemadsorption.
  Stenoxen.

No neutralization antibodies!
No vaccine available.

Clinical signs = Classical swine fever – swine experiment.

Isolation (buffy coat).
Asfivirurs genus –
1) African swine fever.

Question 3

Topic 28: Asfarviridae (African sweine fever), Hepadnaviridae (Hepar, DNA) –”
HEPADNAVIRODAE:

Answer 3

• Genera: Orthohepadna-, Avihepadnavirus genus.
• Morphology: Circular ss/dsDNA, enveloped capsid.
• Resistance: Weak (low pH)
• Biological properties:
  Baltimore VI or VII (Replication with reverse transcription).
  Stenoxen virus.
  Chronic.
• Antigenic properties:
  HBsAg - protective
• Diagnosis:
  ELISA direct or indirect:
  1) Orthohepadnavirus genus – Human hepatitis B.
  2) Avihepadnavirus genus – Duck hepatitis B.

Question 4

Topic 28: Asfarviridae (African sweine fever), Hepadnaviridae (Hepar, DNA) –”
HEPADNAVIRODAE:
Short

Answer 4

• Genera: Orthohepadna-, Avihepadnavirus genus.

Circular ss/dsDNA, enveloped capsid.
Weak resistance

• Biological properties:
  Baltimore VI or VII (Replication with reverse transcription).
  Stenoxen virus.
  Chronic.

HBsAg - protective
ELISA direct or indirect:
Orthohepadna - Human hepatitis B
Avihepadnavirus – Duck hepatitis B.