In this article we will discuss about the morphology and replication of Influenza Virus. Morphology of Influenza Virus: Influenza virus (Fig. 14.18) is pleomorphic and its diameter is 80- 120 nm. It is an enveloped virus possessing genome segmented into eight linear single- stranded molecules ranging in size from 890 to 2341 nucleotides. The nucleocapsid of this virus is of [...]
In this article we will discuss about:- 1. Origin of Simian Virus 40 2. Organisation of Simian Virus 40 3. Replication. Origin of Simian Virus 40 (SV40): Simian virus 40 (SV40) belongs to polyomavirus family, the family of viruses that induce tumours in animals; indeed, the suffix oma means tumour. Simian virus 40 was first isolated from monkeys hence so [...]
In this article we will discuss about the classification of bacteriophage. 1. Bacteriophages with DNA Genome: A. Genome is double-stranded DNA, generally linear. 1. Family Myoviridae: Icosahedral, isometric or elongated head with a helical rigid tail containing a contractile sheath, tail plate, tail fibres and spikes. Example: E. coli phage (coliphage) T2, T4, T6. 2. Family Styloviridae: Icosahedral, isometric head [...]