Search results
Results from the WOW.Com Content Network
Likewise, if an individual suspects exposure for HIV, a lack of symptoms does not indicate that seroconversion has not occurred. 20–30% of people undergoing HIV seroconversion lack symptoms entirely or have mild symptoms. [25] The immune system mounts an acute effort to resolve the HIV infection during the seroconversion period.
Figure 1. Early Symptoms of HIV. The stages of HIV infection are acute infection (also known as primary infection), latency, and AIDS. Acute infection lasts for several weeks and may include symptoms such as fever, swollen lymph nodes, inflammation of the throat, rash, muscle pain, malaise, and mouth and esophageal sores. The latency stage ...
This acute viremia is associated in virtually all people with the activation of CD8 + T cells, which kill HIV-infected cells, and subsequently with antibody production, or seroconversion. The CD8 + T cell response is thought to be important in controlling virus levels, which peak and then decline, as the CD4 + T cell counts rebound.
Antibody tests may give false negative (no antibodies were detected despite the presence of HIV) results during the window period, hence an interval of three weeks to six months between the time of HIV exposure and the production of measurable antibodies to HIV seroconversion is implemented. Most people develop detectable antibodies ...
HIV is a retrovirus that primarily infects components of the human immune system such as CD4 + T cells, macrophages and dendritic cells. It directly and indirectly destroys CD4 + T cells. [88] HIV is a member of the genus Lentivirus, [89] part of the family Retroviridae. [90] Lentiviruses share many morphological and biological characteristics.
At this point, seroconversion, the development of antibodies, occurs and the CD4 T cell counts begin to recover as the immune system attempts to fight the virus, marking the HIV set point. The higher the viral load at the set point, the faster the virus will progress to AIDS ; the lower the viral load at the set point, the longer the patient ...
Two types of HIV have been characterized: HIV-1 and HIV-2. HIV-1 is the virus that was initially discovered and termed both lymphadenopathy associated virus (LAV) and human T-lymphotropic virus 3 (HTLV-III). HIV-1 is more virulent and more infective than HIV-2, [20] and is the cause of the majority of HIV infections globally. The lower ...
WHO Disease Staging System for HIV Infection and Disease was first produced in 1990 by the World Health Organization [1] and updated in 2007. [2] It is an approach for use in resource limited settings and is widely used in Africa and Asia and has been a useful research tool in studies of progression to symptomatic HIV disease .