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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 involves few or no symptoms and can ...
Scanning electron micrograph of HIV-1, colored green, budding from a cultured lymphocyte. HIV is the cause of the spectrum of disease known as HIV/AIDS. 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.
Pathophysiology of HIV/AIDS. HIV is commonly transmitted via unprotected sexual activity, blood transfusions, hypodermic needles, and from mother to child. Upon acquisition of the virus, the virus replicates inside and kills T helper cells, which are required for almost all adaptive immune responses. There is an initial period of influenza-like ...
Visna-maedi virus. The human immunodeficiency viruses ( HIV) are two species of Lentivirus (a subgroup of retrovirus) that infect humans. Over time, they cause acquired immunodeficiency syndrome (AIDS), [ 1][ 2] a condition in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive. [ 3]
Infection with HIV is determined by an HIV test.As of 2021, 85% of all people living with HIV knew their status. [2]The Joint United Nations Program on HIV/AIDS (UNAIDS), Amnesty International, the Global Network of Sex Work Projects and the Global Network of People Living with HIV/AIDS, have all condemned forced HIV testing actions as infringements on human rights and conflicting with proven ...
The genome and proteins of HIV (human immunodeficiency virus) have been the subject of extensive research since the discovery of the virus in 1983. [1] [2] "In the search for the causative agent, it was initially believed that the virus was a form of the Human T-cell leukemia virus (HTLV), which was known at the time to affect the human immune system and cause certain leukemias.
The AIDS epidemic, caused by HIV (Human Immunodeficiency Virus), found its way to the United States between the 1970s and 1980s, [2] but was first noticed after doctors discovered clusters of Kaposi's sarcoma and pneumocystis pneumonia in homosexual men in Los Angeles, New York City, and San Francisco in 1981.
In the central nervous system, the most common AIDS-defining condition is toxoplasmosis. Caused by the parasite Toxoplasma gondii, toxoplasmosis in HIV-infected patients mainly presents as encephalitis, or inflammation of the brain, but can take other forms as well, such as inflammation of the retinas or lungs.