Animal viruses differ from stages in mechanism of entering the host cell. This is due to differences in host cell i.e. one is prokaryotic and the other eukaryotic in nature. It is accomplished into the following stages: 1. Attachment: Animal viruses like bacteriophages posses the attachment sites with the help of which it attaches to the receptor sites present on [...]
In this article we will discuss about the replication of picomavirus. The virion RNA is infectious and serves as both the genome and viral messenger RNA. The internal ribosome entry site (IRES) allows direct translation of the polyprotein. The polyprotein is initially processed by the viral protease(s) into various precursor and mature proteins to yield the structural proteins, replicase, VPg, [...]
In this article we will discus about the classification of animal viruses. Baltimore (2008) classified the animal viruses in the following seven groups according to the relationships between virion, nucleic acid and mRNA transcription Table (17.1). The RNA within the virion is known as plus (+) or sense strand because it acts as mRNA, whereas the newly synthesized RNA which [...]