Virus Lecture 19

Question 1

DNA viruses

Answer 1

Poxviridae
Herpesviridae
Papoviridae
Parvoviridae
Adenoviridae
Hepapdnaviridae

Question 2

T:F The Poxvirus is the only cytoplasmic DNA virus.

Answer 2

True

All the others require the nucleus to replicate

Question 3

What was the first virus eradicated?

Answer 3

Poxvirus - the largest and complex animal virus

Question 4

Chordopoxvirinae effects who?

Answer 4

Vertebrates

Question 5

Entomopoxvirinae effects who?

Answer 5

Insects

Question 6

Groups of important poxvirus:
Avipoxvirus
Capripoxvirus
Cervidpoxvirus
Leporipoxvirus 
Molluscipoxvirus

Answer 6

Avian
Goat
Deer
Rabbits 
Horse

Question 7

Variolation is?

Answer 7

The process of vaccination

Question 8

Adsorption and penetration of the poxvirus is done by?

Answer 8

Binding to the cell surface receptors. It enters via endocytosis or by the direct fusion. The virus is released minus its envelope.

Question 9

What disease dose the Poxvirus cause

Answer 9

Lumpy skin disease in cattle
Ectromelia (self-amputation) in rodents
Rabbid Myxoma (neoplastic transformation) in rabbits
Parapox or Orf in sheep
Swine Pox

Question 10

What is the pox virus characterized by?

Answer 10

Intracytoplasmic inclusion bodies

Question 11

Which is the most dangerous animal pox?

Answer 11

Swine Pox - it is transmitted by biting louse

Question 12

Can the poxvirus species jump?

Answer 12

Yes; Cow pox in cats

Question 13

Where dies the Parvovirus replicate?

Answer 13

In the nucleus and produce intranuclear inclusion bodies

Question 14

Can Parvovirus replicate autonomously?

Answer 14

Yes ONLY in actively cycling cells. Otherwise, co-infection with either an adenovirus or a Herpesvirus is necessary.

Question 15

T:F The Parvovirus is not every stable because of no envelope.

Answer 15

False

It is very stable virus (No envelope)

Question 16

T:F Some Parvovirus contain only the negative-sense DNA strand

Answer 16

True

Question 17

Parvovirus infections of the fetus or newborn result in?

Answer 17

Widespread infection and tissue destruction that cause developmental defects

Question 18

T:F Parvoviruses require cycling cells for virus replication.

Answer 18

True

Question 19

What is the receptor for canine parvovirus and feline panleukopenia virus?

Answer 19

Transferrin

Question 20

What is the disease caused by the parvovirus in cats?

Answer 20

Feline panleukopenia virus

Question 21

What does feline panleukopenia virus cause?

Answer 21

Cerebellar hypoplasia

Question 22

Why does parvovirus effect the young?

Answer 22

It infects and destructs rapidly dividing cells of the villi of the GI tract.

Question 23

Which is the DNA virus that is associated with cell histones (nucleosomes)?

Answer 23

Papilloma virus

Question 24

What is Papilloma virus known to cause?

Answer 24

Warts and cervical cancer.

Question 25

What is the non-enveloped, icosahedral viruses with fibers at vertices?

Answer 25

Adenovirus

Question 26

What does canine adenovirus cause?

Answer 26

Infectious canine hepatitis

Infectious canine bronchitis - Kennel cough

Question 27

Which DNA virus is the most widespread effecting virus?

Answer 27

Herpesvirus

Question 28

Herpesvirus can sometimes alternate host species called?

Answer 28

Species-Jumping

Question 29

Where does DNA replication and encapsidation occur in herpesvirus?

Answer 29

Nucleus

Question 30

What is a herpesvirus infection characterized by?

Answer 30

Eosinophilic intranuclear inclusion bodies

Question 31

Herpesvirus species jumping from porcine herpesvirus to?

Answer 31

Pseudorabies in dogs