25. Arteriviridae and Roniviridae

Question 1

MEMBERS OF THE FAMILY ARTERIVIRIDAE (1 genus)

Answer 1

GENUS ARTERIVIRUS

Question 2

MEMBERS OF THE GENUS ARTERIVIRUS (FAMILY ARTERIVIRIDAE) (5 species)

Answer 2

1. EQUINE ARTERITIS VIRUS
2. LACTATE DEHYDROGENASE-ELEVATING VIRUS
3. PORCINE REPRODUCTIVE and RESPIRATORY SYNDROME VIRUS
4. SIMIAN HEMORRHAGIC FEVER VIRUS
5. WOBBLY POSSUM DISEASE VIRUS
6. Other ARTERIVIRUSES

Question 3

Which viruses have the following properties:

Virions are spherical, 50-70 nm in diameter, with an isometric nucleocapsid and a closely adherent smooth-surfaced envelope with ring-like structures

The genome consists of a single molecule of linear, +ssRNA, 13-15 kb in size. Virion RNA has a 5’ cap and its 3’ end is polyadenylated; the genomic RNA is infectious

Cytoplasmic replication; the genome is transcribed to form a full-length negative-sense RNA, from which is transcribed a 3’ coterminal nested set of mRNAs; only the unique sequences at the 5’ end of each mRNA are translated

Virions are formed by budding into the endoplasmic reticulum, from where they are released by exocytosis

Answer 3

Arteriviruses

Question 5

MEMBERS OF THE FAMILY RONIVIRIDAE (1 genus + 1 species)

Answer 5

• GENUS OKAVIRUS
  
  • YELLOW HEAD AND GILL-ASSOCIATED VIRUSES