Table of Contents
What is an unsegmented virus?
Viruses that package all of their genome segments into a single particle are called segmented viruses, whereas those that package their genome segments into two or more particles are referred to as multipartite viruses [2,3].
What is segmented RNA genome?
Segmented RNA viruses. Viruses in which the genome consists of more than one RNA molecule (that is, segments). The genome segments can be packaged within a single virion particle or into separate particles. Type species.
What is the advantage of a segmented genome?
A segmented genome enables the virus to generate reassortants. In this process, the RNA molecules of different virus strains are mixed or reshuffled in doubly infected cells during replication and morphogenesis. In this way, progeny viruses can obtain new combinations of RNA segments and thus gain novel properties.
What is reassortment in virology?
Virus reassortment, or simply reassortment, is a process of genetic recombination that is exclusive to segmented RNA viruses in which co-infection of a host cell with multiple viruses may result in the shuffling of gene segments to generate progeny viruses with novel genome combinations (Fig 1A) [1].
What do you mean by virion?
virion, an entire virus particle, consisting of an outer protein shell called a capsid and an inner core of nucleic acid (either ribonucleic or deoxyribonucleic acid—RNA or DNA). The core confers infectivity, and the capsid provides specificity to the virus.
Whats is a virion?
Definition of virion : a complete virus particle that consists of an RNA or DNA core with a protein coat sometimes with external envelopes and that is the extracellular infectious form of a virus.
What is called virion?
The virion, that is the complete infectious virus particle, includes a genome comprising one or a few molecules of either DNA or RNA, surrounded by a morphologically defined protein coat, the capsid; the capsid and the enclosed nucleic acid together constitute the nucleocapsid.
What is reassortment in microbiology?
Reassortment is another form of genetic exchange that can occur in segmented viruses—viruses that have their genome split into multiple segments. Reassortment only occurs when multiple viruses co-infect the same cell, and replicate their progeny segments in the same cytoplasm.
What is reassortment vaccine?
A vaccine made by combining antigens from several viruses or from several strains of the same virus.
Is a virion a virus?
Is virion and virus same?
The virus particle or virion represents a virus in its extracellular phase, in contrast to the different intracellular structures involved in virus replication.
What’s the difference between a virus and virion?
Viruses are nucleoproteins. They are non-cellular structures with infectious, genetic material. Virions are capsid encapsulated viruses with DNA or RNA molecules. It has both nucleic acid as well as protein layers.