lysogeenisesti

Lysogeenisesti is a term used in biology and virology to describe a specific type of viral replication cycle. This cycle, also known as the lysogenic cycle, is one of the two major pathways by which bacteriophages (viruses that infect bacteria) can reproduce. In the lysogenic cycle, the phage's genetic material is integrated into the host bacterium's chromosome. Once integrated, the viral DNA is replicated along with the host's DNA every time the bacterium divides.

This integrated viral DNA is called a prophage. During the lysogenic cycle, the prophage typically remains dormant and does not immediately cause the lysis (bursting) of the host cell. Instead, it coexists with the host, and the host cell can continue to live and reproduce normally. This state can persist for many generations.

Under certain conditions, such as stress to the host cell or exposure to specific environmental triggers like UV radiation, the prophage can be induced to enter the lytic cycle. In the lytic cycle, the viral DNA is excised from the host chromosome, and the virus begins to produce new viral particles, ultimately leading to the destruction of the host cell. Therefore, lysogeenisesti refers to the state where the virus is integrated and not actively replicating in a way that destroys the host. It is a strategy for viral survival and propagation that allows the virus to persist within a population of host cells without immediately killing them.