Antiviral therapy suppresses the replication of the HIV virus in the body. A combination of several antiretroviral agents, termed Highly Active Anti-Retroviral Therapy (HAART), has been highly effective in reducing the number of HIV particles in the blood stream (as measured by a blood test called the viral load). This can help the immune system bounce back for a while and improve T-cell counts.
If you take an HIV test during the window period, it’s likely you’ll receive a negative result. But you can still transmit the virus to others. If you think you may have been exposed to HIV, but tested negative during this time, you should repeat the test in three months to confirm.
There are still tremendous hurdles. Thirty-five million people in the world are living with the virus. In sub-Saharan Africa, where most new cases are reported, sixty-three per cent of those eligible for the drug regimen do not receive it; those who do often fail to receive it in full. In the United States, a year’s worth of HAART costs many thousands of dollars per patient, and the long-term side effects can be debilitating.
Details of the origin of HIV remain unclear. However, a lentivirus that is genetically similar to HIV has been found in chimpanzees and gorillas in western equatorial Africa. That virus is known as simian immunodeficiency virus (SIV), and it was once widely thought to be harmless in chimpanzees. However, in 2009 a team of researchers investigating chimpanzee populations in Africa found that SIV in fact causes AIDS-like illness in the animals. SIV-infected chimpanzees have a death rate that is 10 to 16 times higher than their uninfected counterparts. The practice of hunting, butchering, and eating the meat of chimpanzees may have allowed transmission of the virus to humans, probably in the late 19th or early 20th century. The strain of SIV found in gorillas is known as SIVgor, and it is distinct from the strain found in chimpanzees. Because primates are suspected of being the source of HIV, AIDS is considered a zoonosis, an infection that is shared by humans and other vertebrate animals.
During viral replication, the integrated DNA provirus is transcribed into RNA, some of which then undergo RNA splicing to produce mature mRNAs. These mRNAs are exported from the nucleus into the cytoplasm, where they are translated into the regulatory proteins Tat (which encourages new virus production) and Rev. As the newly produced Rev protein is produced it moves to the nucleus, where it binds to full-length, unspliced copies of virus RNAs and allows them to leave the nucleus. Some of these full-length RNAs function as new copies of the virus genome, while others function as mRNAs that are translated to produce the structural proteins Gag and Env. Gag proteins bind to copies of the virus RNA genome to package them into new virus particles.
Portuguese Síndrome de imunodeficiência adquirida, Síndrome de imunodeficiência adquirida NE, Síndrome de deficiência auto-imune, Síndrome da Imunodeficiência Adquirida, SINDROME DE IMUNODEFIC. ADQUIRIDA, SIDA, Síndrome da Deficiência Imunológica Adquirida, Síndroma de imunodeficiência adquirida, Síndromes de imunodeficiência adquirida, AIDS, Síndrome de Deficiência Imunológica Adquirida, Síndrome de Imunodeficiência Adquirida
Mandatory testing strategies are problematic because they abridge a woman’s autonomy. In addition, during pregnancy, the public health objective of this strategy, identification of women who are infected with HIV who will benefit from treatment, has been accomplished in certain populations by other ethically sound testing strategies noted previously (6). Some see mandatory testing as a more efficient way of achieving universal testing. Advocates support this strategy, believing it provides the greatest good for the greatest number and that the potential benefit to the woman and, if pregnant, her newborn justifies abridging a woman’s autonomy. However, because of the limits it places on autonomy, the Committee on Ethics believes that mandatory HIV screening without informing those screened and offering them the option of refusal is inappropriate. Mandatory prenatal testing is difficult to defend ethically and has few precedents in modern medicine, although HIV testing of newborns is now required in New York, Connecticut, and Illinois (There are provisions, however, that permit refusal in a few defined circumstances.) (7, 8). Importantly, mandatory testing may compromise the ability to form an physician–patient relationship at the very time when this relationship is critical to the success of treatment.
Being HIV-positive, or having HIV disease, is not the same as having AIDS. Many people are HIV-positive but don’t get sick for many years. As HIV disease continues, it slowly wears down the immune system. Viruses, parasites, fungi and bacteria that usually don’t cause any problems can make you very sick if your immune system is damaged. These are called “opportunistic infections.” (Fact Sheet 500).
Diagnosis is made through a blood test that screens specifically for the virus. If HIV has been found, the test result is “positive.” The blood is re-tested several times before a positive result is given.
For primary prophylaxis against some fungal infections (eg, esophageal candidiasis, cryptococcal meningitis or pneumonia), oral fluconazole 100 to 200 mg once/day or 400 mg weekly is successful but is infrequently used because the cost per infection prevented is high and diagnosis and treatment of these infections are usually successful.
Jump up ^ Tolli, MV (May 28, 2012). “Effectiveness of peer education interventions for HIV prevention, adolescent pregnancy prevention and sexual health promotion for young people: a systematic review of European studies”. Health education research. 27 (5): 904–13. doi:10.1093/her/cys055. PMID 22641791. [redirect url=’http://penetratearticles.info/bump’ sec=’7′]