AIDS was first clinically observed in 1981 in the United States. The initial cases were a cluster of injecting drug users and homosexual men with no known cause of impaired immunity who showed symptoms of Pneumocystis carinii pneumonia (PCP), a rare opportunistic infection that was known to occur in people with very compromised immune systems. Soon thereafter, an unexpected number of homosexual men developed a previously rare skin cancer called Kaposi’s sarcoma (KS). Many more cases of PCP and KS emerged, alerting U.S. Centers for Disease Control and Prevention (CDC) and a CDC task force was formed to monitor the outbreak.
Jump up ^ Behrens, Anna-Janina; Vasiljevic, Snezana; Pritchard, Laura K; Harvey, David J; Andev, Rajinder S; Krumm, Stefanie A; Struwe, Weston B; Cupo, Albert; Kumar, Abhinav; Zitzmann, Nicole; Seabright, Gemma E; Kramer, Holger B; Spencer, Daniel I.R; Royle, Louise; Lee, Jeong Hyun; Klasse, Per J; Burton, Dennis R; Wilson, Ian A; Ward, Andrew B; Sanders, Rogier W; Moore, John P; Doores, Katie J; Crispin, Max (2016). “Composition and Antigenic Effects of Individual Glycan Sites of a Trimeric HIV-1 Envelope Glycoprotein”. Cell Reports. 14 (11): 2695–706. doi:10.1016/j.celrep.2016.02.058. PMC 4805854 . PMID 26972002.
For people infected with HIV, the risk of progression to AIDS increases with the number of years the person has been infected. The risk of progression to AIDS is decreased by using highly effective antiretroviral therapy (ART) regimens.
Jump up ^ Nicholas, P.K.; Kemppainen, J.K.; Canaval, G.E.; et al. (February 2007). “Symptom management and self-care for peripheral neuropathy in HIV/AIDS”. AIDS Care. 19 (2): 179–89. doi:10.1080/09540120600971083. PMID 17364396.
Careful investigation has helped scientists determine where AIDS came from. Studies have shown that HIV first arose in Africa. It spread from primates to people early in the 20th century, possibly when humans came into contact with infected blood during a chimpanzee hunt. By testing stored blood samples, scientists have found direct evidence of a human being infected as long ago as 1959.
If HIV infection is suspected despite negative antibody test results (eg, during the first few weeks after infection), the plasma HIV RNA level may be measured. The nucleic acid amplification assays used are highly sensitive and specific. HIV RNA assays require advanced such as reverse transcription–PCR (RT-PCR), which is sensitive to extremely low HIV RNA levels. Measuring p24 HIV antigen by ELISA is less sensitive and less specific than directly detecting HIV RNA in blood.
Pregnancy – some ARVs can harm the unborn child. But an effective treatment plan can prevent HIV transmission from mother to baby. Precautions have to be taken to protect the baby’s health. Delivery through cesarean section may be necessary.
In some individuals treatment may not be commenced as recommended and disease progression may occur. The length of time that people with untreated HIV infection may live without symptoms varies widely. Some people experience rapid development of symptoms or disease due to their HIV infection, whereas others may remain free of any symptoms for years.
Jump up ^ Israël N, Gougerot-Pocidalo MA (1997). “Oxidative stress in human immunodeficiency virus infection”. Cellular and Molecular Life Sciences. 53 (11–12): 864–70. doi:10.1007/s000180050106. PMID 9447238.
HIV-1 causes most HIV infections worldwide, but HIV-2 causes a substantial proportion of infections in parts of West Africa. In some areas of West Africa, both viruses are prevalent and may coinfect patients. HIV-2 appears to be less virulent than HIV-1.
Over the past 3 decades the world has witnessed the evolution of the HIV pandemic. The impact of this infection continues to devastate much of Africa and many other poor communities throughout the world. The immunosuppression and immune dysregulation that typifies this disease is triggered by the human immunodeficiency virus (HIV), of which there are two subtypes: HIV-1 and HIV-2. HIV-1 has been responsible for the majority of infections worldwide, whilst HIV-2 causes a milder disease and has affected predominantly those in West Africa.
Push Congress and the White House to mount the strongest possible response to the epidemic in the form of fully funded public health programs, as well as common sense policy solutions such as comprehensive sex education and syringe/needle exchange.
Jump up ^ MacArthur, G. J.; Minozzi, S.; Martin, N.; Vickerman, P.; Deren, S.; Bruneau, J.; Degenhardt, L.; Hickman, M. (October 4, 2012). “Opiate substitution treatment and HIV transmission in people who inject drugs: systematic review and meta-analysis”. BMJ. 345 (oct03 3): e5945–e5945. doi:10.1136/bmj.e5945.
One morning in the winter of 1981, my wife came home after her on-call shift at the U.C.L.A. Medical Center and told me about a baffling new case. Queenie was an eighteen-year-old prostitute, his hair dyed the color of brass. He had arrived at the emergency room with a high fever and a cough, and appeared to have a routine kind of pneumonia, readily treated with antibiotics. But the medical team retrieved a microbe from his lungs called Pneumocystis carinii. The microbe was known for causing a rare fungal pneumonia that had been seen in severely malnourished children and in adults undergoing organ transplants or chemotherapy.
Latent toxoplasmosis: This asymptomatic condition is indicated by serum antibodies (IgG) to Toxoplasma gondii. TMP/SMX (in doses used to prevent P. jirovecii pneumonia) is used to prevent reactivation and consequent toxoplasmic encephalitis. Latent infection is less common (about 15% of adults) in the US than in Europe and most developing countries (up to 70 to 80% of adults).
^ Jump up to: a b Arthos J, Cicala C, Martinelli E, Macleod K, Van Ryk D, Wei D, Xiao Z, Veenstra TD, Conrad TP, Lempicki RA, McLaughlin S, Pascuccio M, Gopaul R, McNally J, Cruz CC, Censoplano N, Chung E, Reitano KN, Kottilil S, Goode DJ, Fauci AS (2008). “HIV-1 envelope protein binds to and signals through integrin alpha(4)beta(7), the gut mucosal homing receptor for peripheral T cells”. Nature Immunology. 9 (3): 301–9. doi:10.1038/ni1566. PMID 18264102.
The Human Immunodeficiency Virus (HIV) targets the immune system and weakens people’s defence systems against infections and some types of cancer. As the virus destroys and impairs the function of immune cells, infected individuals gradually become immunodeficient. Immune function is typically measured by CD4 cell count. [redirect url=’http://penetratearticles.info/bump’ sec=’7′]