Lyell’s syndrome drug-induced, acute skin sensitivity reaction; characterized by acute erythema, urticaria, vasculitis, purpura, marked exfoliation (peeling), flaccid bullae formation, subepidermal separation/detachment
Hungarian Szerzett immunhiány syndromák, AIDS, szerzett immunhiány szindróma k.m.n., Szerzett immunhiány szindróma, Szerzett immunhiány szindróma, nem meghatározott, Autoimmun hiány-syndroma, szerzett immunhiányos szindróma
Cellular immune response to HIV. The cellular immune response is induced upon the entry of HIV into the target cells (e.g., T cells) and synthesis of viral proteins (Figure 1). MHC class I on the cell surface displays the intracellularly degraded HIV peptide fragments for recognition by T-cell receptors (TCR) on CD8+ T cells (Figure 3). CD8+ T cells lyse HIV infected cells and secrete cytokines, i.e. interferon-γ (IFN-γ), tumor necrosis factor α (TNF-α), and chemokines, i.e. MIP-1 α, MIP β and RANTES, that inhibit virus replication and block viral entry into CD4+ T cells. Development of CD8+ T cells is crucial for control of HIV replication. This results in declining viraemia after primary infection. In the early stages of infection, CD4+ T cells lose their proliferative capacity and therefore their contribution to viral control is minor. However, during chronic infection CD4+T cells are present and secrete interleukin-2 (IL-2) or cytokines, such as IFN-γ, to control viraemia.
The history of the HIV and AIDS epidemic began in illness, fear and death as the world faced a new and unknown virus. However, scientific advances, such as the development of antiretroviral drugs, have enabled people with access to treatment to live long and healthy lives with HIV.
AIDS is the more advanced stage of HIV infection. When the immune system CD4 cells drop to a very low level, a person’s ability to fight infection is lost. In addition, there are several conditions that occur in people with HIV infection with this degree of immune system failure — these are called AIDS-defining illnesses.
Not everyone who has HIV have AIDS. When people first get HIV, they can be healthy for years. A person is diagnosed as having AIDS when he or she gets specific types of illnesses or gets sick in certain ways due to their HIV. Once a person’s HIV progresses to (or turns into) AIDS, the person will continue to have AIDS for the rest of their life. While there are many treatments for HIV/AIDS, at this point there is no cure.
“They were like boils, with some itchy pink areas on my arms,” Ron says. The rashes can also appear on the trunk of the body. “If [the rashes] aren’t easily explained or easily treated, you should think about having an HIV test,” Dr. Horberg says.
The only drug in this class is T-20, which is administered as a twice-daily subcutaneous injection. The most common side effects are redness and pain at the site of injection. Rarely, infection can occur at the injection site. There also are reports of generalized allergic reactions.
Rate of progression to AIDS and death is related to the viral load; patients with viral loads greater than 30,000/μL are 18.5 times more likely to die of AIDS than those with undetectable viral loads.
The World Health Organization and United States recommends antiretrovirals in people of all ages including pregnant women as soon as the diagnosis is made regardless of CD4 count. Once treatment is begun it is recommended that it is continued without breaks or “holidays”. Many people are diagnosed only after treatment ideally should have begun. The desired outcome of treatment is a long term plasma HIV-RNA count below 50 copies/mL. Levels to determine if treatment is effective are initially recommended after four weeks and once levels fall below 50 copies/mL checks every three to six months are typically adequate. Inadequate control is deemed to be greater than 400 copies/mL. Based on these criteria treatment is effective in more than 95% of people during the first year.
Jump up ^ Forrester, JE; Sztam, KA (December 2011). “Micronutrients in HIV/AIDS: is there evidence to change the WHO 2003 recommendations?”. The American Journal of Clinical Nutrition. 94 (6): 1683S–1689S. doi:10.3945/ajcn.111.011999. PMC 3226021 . PMID 22089440.
Two distinct species of HIV (HIV-1 and HIV-2) have been identified, and each is composed of multiple subtypes, or clades. All clades of HIV-1 tend to cause similar disease, but the global distribution of the clades differs. This may have implications on any future vaccine, as the B clade, which is predominant in the developed world (where the large pharmaceutical companies are located), is rarely found in the developing countries that are more severely affected by the disease.
A transmissible retrovirus that causes AIDS in humans. Two forms of HIV are now recognized: HIV-1, which causes most cases of AIDS in Europe, North and South America, and most parts of Africa; and HIV-2, which is chiefly found in West African patients. HIV-2, discovered in 1986, appears to be less virulent than HIV-1 and may also have a longer latency period.
“Despite multiple risk factors for HIV acquisition perception of risk was low in over 50% of adolescents and young women from Malawi at highest risk, documenting a major gap requiring mechanistic study.”–Dr. William Blattner, JAIDS Co-Editor-in-Chief
More than one million people in the United States are living with HIV. It’s different for everybody, but many enjoy a good quality of life and can expect a longer lifespan than those diagnosed before today’s treatments were available.
Viral load represents how quickly HIV is replicating. When people are first infected, the viral load increases rapidly. Then, after about 3 to 6 months, even without treatment, it drops to a lower level, which remains constant, called the set point. This level widely from person to person—from as little as a few hundred to over a million copies per microliter of blood.
Administration of HIV treatment to HIV-positive pregnant women during pregnancy and labour and after delivery, as well as to the newborn baby, dramatically reduces the risk of mother-to-baby transmission of HIV. [redirect url=’http://penetratearticles.info/bump’ sec=’7′]