Viral Classification And Structure

Question 1

Virus

Answer 1

Small obligate IC agents that cam replicate only within living susceptible cells

Question 2

Virus structure simply

Answer 2

Genetic info in a package to protect it from the enviro and enable entry into host cell for replication

Question 3

Package cont

Answer 3

Pro and can sometimes cont lipid
The pros may incl enzymes as well as having structural fx and potentially other biological fxs to assist with repl
Rely on host cell for translation and maybe transcription mech

Question 4

Capsid structure

Answer 4

Pro shell surrounding the nucleic acid

Made up of pro units called capsomeres

Question 5

What is the nucleocapsid

Answer 5

Combo of nucleic acid and capsid

Question 6

Envelope

Answer 6

Capsid may or may not be surrounded by a lipid bilayer mem (envelope)
Enveloped viruses have glycoproteins encoded by the virus present in the mem

Question 7

Virion

Answer 7

A virus particle

Question 8

2 criteria for classification

Answer 8

Structure of virus (both morphology and biochem comp

Mode of replication

Question 9

Viral classification diff to animal, plant etc class

Answer 9

Virus only have family

Subfamily and genus levels and individual mem of genus is a strain or species or type

Question 10

Some key criterion for viral classification

Answer 10

DNA or RNA genome (1st criterion)
Refined further by double or single stranded
And one piece v segmented genome
Also enveloped v non-enveloped

Question 11

Enveloped DNA viruses

Answer 11

Herpes
Hepadna
Pox

Question 12

Enveloped rna viruses

Answer 12

Orthomyxo
Bunya
Paramyxo
Corona
Arteri
Retro
Filo
Rhabdo

Question 13

Naked dna viruses

Answer 13

Adeno
Papo
Parvo
Circo

Question 14

Naked rna viruses

Answer 14

Calici
Picorna
Reo

Question 15

Herpesviridae

Answer 15

Ovine herpes virus 2 cause malignant catarrhal fever in cattle but is asymptom in sheep all sheep have after about 3 mnth old

Question 16

Poxviridae

Answer 16

Dumbell shaped core
Myxomatosis
Orf
Smallpox
2or 3 mems

Question 17

Orthomyxo

Answer 17

Flu

Classify by H and N surf glycopros

Question 18

Paramyxo

Answer 18

Newcastle disease
Measles
Rinderpest

Question 19

Coronaviridae

Answer 19

FIV

Arteriviridae are related but with a smaller genome

Question 20

Retroviridae

Answer 20

Feline leukaemia

Ovine pulmonary adenomatosis

Question 21

Filoviridae

Answer 21

Ebola

Filamentous

Question 22

Rhabdoviridae

Answer 22

Rabies

Rod shaped

Question 23

Adenoviridae

Answer 23

Cause of some common colds

Question 24

Parvoviridae

Answer 24

Single stranded bases
V small
Feline panleukopaenia

Question 25

Circoviridae

Answer 25

Small
Single stranded Dna
Porcine post weaning multi system wasting syndrome

Question 26

Calicivirus

Answer 26

Rabbit haemmorrhagic fever

Feline calicivirus

Question 27

Picornaviridae

Answer 27

FMD

Polio fever

Question 28

Reoviridae

Answer 28

Bovine rotavirus

Bluetongue

Question 29

Baltimore classification

Answer 29

Relate viral genome to mRNA sense

Question 30

Balt class 1

Answer 30

dsDNA

Question 31

Balt class2

Answer 31

ssDNA

Question 32

Balt class3

Answer 32

dsRNA

Question 33

Balt class4

Answer 33

+ve sense ssRNa

Question 34

Balt class 5

Answer 34

-ve sense ssRNA

Question 35

Balt class 6

Answer 35

Retroviridae

Question 36

Balt class 7

Answer 36

Reversiviruses (Hep B)