when the herpesvirus is latent it resides in which area
Virus latency One example is herpes virus family, Herpesviridae, all of which establish latent infection. Herpes virus include chicken-pox virus and herpes simplex viruses (HSV-1, HSV-2), all of which establish episomal latency in neurons and leave linear genetic material floating in the cytoplasm.[3] The Gammaherpesvirinae subfamily is associated with episomal latency established in cells of the immune system, such as B-cells in the case of Epstein-Barr virus.[3][4] Epstein-Barr virus lytic reactivation (which can be due to chemotherapy or radiation) can result in genome instability and cancer.[5] In the case of herpes simplex (HSV), the virus has been shown to fuse with DNA in neurons, such as nerve ganglia[6] or brain cells[citation needed], and HSV reactivates upon even minor chromatin loosening with stress,[7] although the chromatin compacts (becomes latent) upon oxygen and nutrient deprivation.[8]
Retrovirus A retrovirus is a single-stranded positive-sense RNA virus with a DNA intermediate and, as an obligate parasite, targets a host cell. Once inside the host cell cytoplasm, the virus uses its own reverse transcriptase enzyme to produce DNA from its RNA genome, the reverse of the usual pattern, thus retro (backwards). The new DNA is then incorporated into the host cell genome by an integrase enzyme, at which point the retroviral DNA is referred to as a provirus. The host cell then treats the viral DNA as part of its own genome, transcribing and translating the viral genes along with the cell's own genes, producing the proteins required to assemble new copies of the virus. It is difficult to detect the virus until it has infected the host. At that point, the infection will persist indefinitely.