Active clinical trials for "HIV Infections"

The purpose of this study is to find out whether three different anti-HIV vaccines are safe and whether they help prevent HIV infection. These vaccines are called vCP205, vCP1433, and vCP1452. Some patients also receive another anti-HIV vaccine, gp160. The vaccines are made up of small pieces of HIV, which help the body learn to recognize and destroy HIV. You cannot get HIV from these vaccines. There are two different ways a vaccine can protect the body from infection. First, a vaccine may help the immune system make antibodies, which are proteins that recognize invading viruses or bacteria. Second, a vaccine may help the body make immune cells that destroy infected cells. The second type of vaccine is more powerful against HIV. In this study, doctors will see whether vCP205, vCP1433, vCP1452, and gp160 are good vaccines by seeing whether they help the body make immune cells.

The purpose of this study is to see if nonoxynol-9 (N-9) gel used in the vagina can prevent the spread of HIV. Most of the people with HIV in the world today live in southern Africa. Because this population is not likely to use condoms, an HIV-prevention method that women can control is needed. N-9 used in the vagina may help prevent the spread of HIV and other sexually transmitted diseases.

The purpose of this study is to see if it is safe to use BufferGel in the vaginas of women who do not have HIV and who have a low risk of getting HIV. Many new cases of HIV are the result of heterosexual activity. Condom use is currently the only effective way of preventing the spread of HIV and other sexually transmitted diseases (STDs). However, women, who have a greater risk of getting HIV, are often unable to convince their partner to use a condom. Therefore, it is important to develop methods that prevent the spread of HIV and that are controlled by the woman, such as medicines used in the vagina. BufferGel is known to kill the organisms that cause STDs, including HIV. BufferGel may do this without causing genital irritation and sores as other medicines do. More studies are needed to see if this is true.

To evaluate the safety and immune response to 160 mcg HIV-1 recombinant envelope glycoprotein gp160. To evaluate the duration of antibody response and its relationship to dose and frequency of inoculation. Evaluation of previous patients who received doses of 40 or 80 mcg gp160 vaccine indicate that, although serum anti-gp160 antibody responses were detected, the level and duration of those responses were limited. A preliminary observation suggests that weak functional antibody responses may develop following the 18 month booster of 40 or 80 mcg; therefore, a dose of gp160 vaccine having potentially greater immunogenicity is of particular interest.

To evaluate and compare the safety and effectiveness of a one-year course of isoniazid (INH) versus a two-month course of rifampin plus pyrazinamide for the prevention of reactivation tuberculosis in individuals infected with both HIV and latent (inactive) Mycobacterium tuberculosis. Current guidelines from the American Thoracic Society and the Centers for Disease Control recommend 6 to 12 months of INH for PPD (purified protein derivative)-positive individuals. Although the effectiveness of this treatment is not known for HIV-infected individuals, several studies using INH to prevent tuberculosis in presumably normal hosts have shown 60 to 80 percent effectiveness. Problems with this treatment include compliance, adverse reaction, and the possibility of not preventing disease due to tuberculosis organisms being resistant to INH. A two-month preventive treatment plan should help in increasing compliance. In addition, the use of two drugs (rifampin / pyrazinamide) may help overcome problems with drug resistance. If this study shows equal or greater effectiveness of the two-month rifampin / pyrazinamide treatment, it could alter the approach to tuberculosis prevention for both HIV-positive and HIV-negative individuals.

The pathophysiology from anal HPV infection to Anal Intraepithelial Neoplasia is less well understood than cervical HPV infection. In cervical screening programs it is well accepted that the sole presence of a high-risk HPV strain (irrespective of number of viral particles) is sufficient to justify further investigation and treatment. The investigators hypothesize that in anal HPV infection not only the presence but the extent of HPV infection (single genotype viral load) or combination of different HPV genotypes (cumulative viral load) is of importance in determining the risk of anal dysplasia.

This research trial studies the incidence of human immunodeficiency virus (HIV) infection in screening Indian men who have sex with men (MSM). Gathering health information over time from Indian MSM may help doctors determine how many Indian MSM develop new cases of HIV infection.

This study assesses topics as Human Immunodeficiency Virus (HIV), Human Papilloma Virus (HPV), and cancer screening methods. The focus will be on evaluating feasibility of implementing novel cancer screening modalities in a low-resource setting in Guinea-Bissau and further to estimate the prevalence of the precancerous virus HPV amongst women living with HIV. In the study we will collect urinary and vaginal self-samples for HPV testing, and further evaluate the feasibility of implementing the devices as screening modalities through questionnaires given to the women.

The purpose of this study is to determine if CP-675,206, a monoclonal antibody to CTLA4, is safe and well-tolerated, reduces viral load, and improves immune function in patients infected with HIV.

The purpose of this study is to determine eligibility for one of three treatment studies of the CCR5 antagonist GW873140 or an observational study without GW873140. No investigational treatment will be administered through this study.