Virus Lecture 19 Flashcards Preview

Microbiology > Virus Lecture 19 > Flashcards

Flashcards in Virus Lecture 19 Deck (31):
1

DNA viruses

Poxviridae
Herpesviridae
Papoviridae
Parvoviridae
Adenoviridae
Hepapdnaviridae

2

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

True
All the others require the nucleus to replicate

3

What was the first virus eradicated?

Poxvirus - the largest and complex animal virus

4

Chordopoxvirinae effects who?

Vertebrates

5

Entomopoxvirinae effects who?

Insects

6

Groups of important poxvirus:
Avipoxvirus
Capripoxvirus
Cervidpoxvirus
Leporipoxvirus
Molluscipoxvirus

Avian
Goat
Deer
Rabbits
Horse

7

Variolation is?

The process of vaccination

8

Adsorption and penetration of the poxvirus is done by?

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

9

What disease dose the Poxvirus cause

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

10

What is the pox virus characterized by?

Intracytoplasmic inclusion bodies

11

Which is the most dangerous animal pox?

Swine Pox - it is transmitted by biting louse

12

Can the poxvirus species jump?

Yes; Cow pox in cats

13

Where dies the Parvovirus replicate?

In the nucleus and produce intranuclear inclusion bodies

14

Can Parvovirus replicate autonomously?

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

15

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

False
It is very stable virus (No envelope)

16

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

True

17

Parvovirus infections of the fetus or newborn result in?

Widespread infection and tissue destruction that cause developmental defects

18

T:F Parvoviruses require cycling cells for virus replication.

True

19

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

Transferrin

20

What is the disease caused by the parvovirus in cats?

Feline panleukopenia virus

21

What does feline panleukopenia virus cause?

Cerebellar hypoplasia

22

Why does parvovirus effect the young?

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

23

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

Papilloma virus

24

What is Papilloma virus known to cause?

Warts and cervical cancer.

25

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

Adenovirus

26

What does canine adenovirus cause?

Infectious canine hepatitis
Infectious canine bronchitis - Kennel cough

27

Which DNA virus is the most widespread effecting virus?

Herpesvirus

28

Herpesvirus can sometimes alternate host species called?

Species-Jumping

29

Where does DNA replication and encapsidation occur in herpesvirus?

Nucleus

30

What is a herpesvirus infection characterized by?

Eosinophilic intranuclear inclusion bodies

31

Herpesvirus species jumping from porcine herpesvirus to?

Pseudorabies in dogs