What is the meaning of picornavirus?
any of a group of small, RNA-containing viruses of the family Picornaviridae, infectious to humans and other animals, and including the poliovirus and the rhinoviruses that cause the common cold. …
What causes picornavirus?
Epidemiology. Picornaviruses are widely prevalent. Enteroviruses are transmitted by the fecal-oral route, via salivary and respiratory droplets, and in some cases via conjunctival secretions and skin lesion exudates. Cockroaches and flies may be vectors.
Is polio a picornavirus?
Poliomyelitis (commonly known as “polio”) is an infectious disease caused by polioviruses 1, 2, and 3 in the enterovirus genus of the picornaviridae viral family. From a public health standpoint, it is the most important of the enteroviruses.
What is the full meaning of icosahedral?
: a polyhedron having 20 faces.
What is the meaning of the word picornavirus?
[pi-kawr-nuh-vahy-ruh s, -kawr-nuh-vahy-] noun, plural pi·cor·na·vi·rus·es. any of a group of small, RNA-containing viruses of the family Picornaviridae, infectious to humans and other animals, and including the poliovirus and the rhinoviruses that cause the common cold.
How big is a picornavirus virus in nm?
Parvoviridae and Picornaviridae and measure about 20 nm and about 30 nm in diameter, respectively. Viruses of these two families are icosahedrons and contain nucleic acids with limited genetic information. Viruses of the family Poxviridae are about 250 to 400 nm in their longest dimension, and they…
How are picornavirus mRNAs different from mammalian mRNAs?
Tyrosine as a –OH source for covalently linked to 5′ end of RNA. The genome is not segmented and positive-sense (the same sense as mammalian mRNA, being read 5′ to 3′). Unlike mammalian mRNA, picornaviruses do not have a 5′ cap, but a virally encoded protein known as VPg.
What kind of RNA is needed for picornavirus replication?
Genomic RNAs of picornaviruses possess multiple RNA elements, and they are required for both negative- and positive-strand RNA synthesis. The cis-acting replication element (CRE) is required for replication.