Proviral DNA enters the host cell’s nucleus and is integrated into the host DNA in a process that involves integrase, another HIV enzyme. With each cell division, the integrated proviral DNA is duplicated along with the host DNA. Subsequently, the proviral HIV DNA can be transcribed to HIV RNA and translated to HIV proteins, such as the envelope glycoproteins 41 and 120. These HIV proteins are assembled into HIV virions at the host cell inner membrane and budded from the cell surface within an envelop of modified human cell membrane. Each host cell may produce thousands of virions.
Genetic studies have led to a general classification system for HIV that is primarily based on the degree of similarity in viral gene sequence. The two major classes of HIV are HIV-1 and HIV-2. HIV-1 is divided into three groups, known as group M (main group), group O (outlier group), and group N (new group). Worldwide, HIV-1 group M causes the majority of HIV infections, and it is further subdivided into subtypes A through K, which differ in expression of viral genes, virulence, and mechanisms of transmission. In addition, some subtypes combine with one another to create recombinant subtypes. HIV-1 group M subtype B is the virus that spread from Africa to Haiti and eventually to the United States. Pandemic forms of subtype B are found in North and South America, Europe, Japan, and Australia. Subtypes A, C, and D are found in sub-Saharan Africa, although subtypes A and C are also found in Asia and some other parts of the world. Most other subtypes of group M are generally located in specific regions of Africa, South America, or Central America.
Jump up ^ Worobey, Michael; Gemmel, Marlea; Teuwen, Dirk E.; Haselkorn, Tamara; Kunstman, Kevin; Bunce, Michael; Muyembe, Jean-Jacques; Kabongo, Jean-Marie M.; Kalengayi, Raphaël M.; Van Marck, Eric; Gilbert, M. Thomas P.; Wolinsky, Steven M. (2008). “Direct evidence of extensive diversity of HIV-1 in Kinshasa by 1960” (PDF). Nature. 455 (7213): 661–4. Bibcode:2008Natur.455..661W. doi:10.1038/nature07390. PMC 3682493 . PMID 18833279. (subscription required)
HIV treatment outcomes over a whole lifetime are not yet known and drug resistance can limit the treatment options available to the person. Some of the drugs have significant side effects and all must be taken very accurately, requiring quite some effort on the part of the HIV infected person to take the medications for a long period, probably for life.
Jump up ^ Sharp PM, Bailes E, Chaudhuri RR, Rodenburg CM, Santiago MO, Hahn BH (2001). “The origins of acquired immune deficiency syndrome viruses: where and when?” (PDF). Philosophical Transactions of the Royal Society B. 356 (1410): 867–76. doi:10.1098/rstb.2001.0863. PMC 1088480 . PMID 11405934.
Jump up ^ Brenchley JM, Schacker TW, Ruff LE, Price DA, Taylor JH, Beilman GJ, Nguyen PL, Khoruts A, Larson M, Haase AT, Douek DC (September 2004). “CD4+ T cell depletion during all stages of HIV disease occurs predominantly in the gastrointestinal tract”. J. Exp. Med. 200 (6): 749–59. doi:10.1084/jem.20040874. PMC 2211962 . PMID 15365096.
It is also important to foster wider availability of comprehensive services for people living with HIV and their partners through partnerships among health departments, community-based organizations, and health care and social service providers.
stage 3 atrophic phase, characterized by reduced/absent/intractable pain, irreversible atrophy of skin/subcutaneous tissues, flexion contractures of foot, advanced osteoporosis with a ‘ground-glass’ appearance on X-ray of affected bone
Clinics that do HIV tests keep your test results secret. Some clinics even perform HIV tests without ever taking your name (anonymous testing). You must go back to the clinic to get your results. A positive test means that you have HIV. A negative test means that no signs of HIV were found in your blood.
Human immunodeficiency virus (HIV)-associated cholangiopathy has been described in children.25 As in adults, the biliary abnormalities include irregularities of contour caliber of the intrahepatic and extrahepatic ducts and papillary stenosis. The changes may result from concomitant infection with opportunistic organisms such as cytomegalovirus and Cryptosporidium parvum. Ascariasis infestation may be the most prevalent biliary infection worldwide, although concentrated within tropical climates. Among 214 children admitted to hospital in northern India for management of hepatobiliary and pancreatic ascariasis, 20 (9%) underwent endoscopic and 7 (4%) surgical intervention.26
One of the problems with finding a cure is that the virus can persist in cells throughout the body and potentially hide in areas that are difficult for drugs to reach, like the brain. New research is helping us understand how to effectively treat viruses in these secluded areas of the body. In addition, those infected cells that persist in the body are being studied to determine how they can be stimulated to produce virus and/or be targeted for clearance from the body by novel therapies.
During a blood transfusion, blood or blood products are transferred from one person to another. There are two types of transfusions, autologous (your own blood), and donor blood (someone else’s blood). There are four blood types: A; B; C; and O.
People who have been exposed to HIV from a blood splash, needlestick, or sexual contact may reduce the chance of infection by taking antiretroviral drugs for 4 weeks. These drugs are more effective when they are started as soon as possible after the exposure. Taking three or more drugs is currently recommended.
Viral load in peripheral blood is used as a surrogate marker of viral replication rate; however, quantitative viral-load assays should not be used as a diagnostic tool. Clinical relevance is as follows:
Cushing’s syndrome raised blood cortisol (e.g. due to pituitary tumour; long-term steroid therapy); characterized by central obesity, moon-like facies, acne, skin striae, hypertension, decreased carbohydrate tolerance and tendency to diabetes, female amenorrhoea and hirsutism
A single case report detailed a possible cure resulting from stem-cell transplantation from a CCR5-delta32 homozygous donor (performed to treat acute myelocytic leukemia). Although this important finding is unlikely to impact routine management of HIV infection, it does suggest that reconstitution of a host immune system with a population of mutant cells is a possible avenue of research to explore. 
Although many effective medications are on the market, the virus can become resistant to any drug. This can be a serious complication if it means that a less effective medicine must be used. To reduce the risk of resistance, patients should take their medications as prescribed and call their physician immediately if they feel they need to stop one or more drugs. [redirect url=’http://penetratearticles.info/bump’ sec=’7′]