Calicivirus

>Norovirus, a common cause of food poisoning and acute gastroenteritis in humans; >Sapovirus, formerly called 'Sapporo-like virus' (SLV) and sometimes referred to as classic or typical calicivirus, which can also cause gastroenteritis in humans; >Vesivirus, the swine vesicular exanthema virus; and >Lagovirus, the rabbit haemorrhagic disease virus.

</LI></UL> The hepatitis E virus, once considered a calicivirus, now belongs to an unassigned (or floating) genus called the hepatitis E-like viruses.

All of the caliciviruses are single-stranded RNA, nonenveloped viruses.

Their genetic information is encoded in a single strand of RNA and they lack an envelope.

The name calicivirus comes from their characteristic 'Star of David' shape with cup-shaped (chalice) indentations.