27. Caliciviridae and Astroviridae

Question 1

MEMBERS OF THE FAMILY CALICIVIRIDAE (5 genera)

Answer 1

Currently:

1. Lagovirus,
2. Nebovirus
3. Norovirus,
4. Sapovirus,
5. Vesivirus,

with an additional four genera proposed:

1. Recovirus
2. Valovirus,
3. Nacovirus,
4. Bavovirus

Question 2

Which viruses have the following properties:

Virions are non-enveloped, 27-40 nm in diameter, with icosahedral symmetry. Some virions have a characteristic appearance, with 32 cup-shaped depressions on their surface

Virions are assembled from one capsid protein (Mr 60,000)

Genome is composed of a single molecule of linear +ssRNA, 7.4-8.3 kb in size

Genomic RNA is polyadenylated at its 3’ end and has a protein linked covalently to its 5’ end; genomic RNA is infectious

Cytoplasmic replication. Genomic RNA and several subgenomic mRNAs are produced during replication; mature proteins are produced both by processing of a polyprotein and by translation of subgenomic mRNAs

Answer 2

Caliciviruses

Question 4

MEMBERS OF THE GENUS LAGOVIRUS (Fam. CALICIVIRIDAE)

Answer 4

RABBIT HEMORRHAGIC DISEASE AND EUROPEAN BROWN HARE VIRUSES

Question 5

MEMBERS OF THE GENUS NOROVIRUS (Fam. CALICIVIRIDAE)

Answer 5

MURINE NOROVIRUS

Question 6

MEMBERS OF THE GENUS VESIVIRUS (Fam. CALICIVIRIDAE) (3 species)

Answer 6

1. VESICULAR EXANTHEMA OF SWINE VIRUS
2. SAN MIGUEL SEA LION VIRUS
3. FELINE CALICIVIRUS

Question 7

MEMBERS OF THE FAMILY ASTROVIRIDAE (2 genera)

Answer 7

1. Avastrovirus
2. Mamastrovirus

Question 8

ENTERIC ASTROVIRUSES (2 species)

Answer 8

1. AVIAN ENTERIC ASTROVIRUS
2. MINK ENTERIC ASTROVIRUS

Question 9

EXTRAINTESTINAL ASTROVIRUSES (3 species)

Answer 9

1. AVIAN NEPHRITIS ASTROVIRUS
2. AVIAN HEPATITIS ASTROVIRUS
3. ASTROVIRUS Encephalomyelitis of Mink and Cattle