HIV Infections Clinical Trial
Official title:
A Trial to Assess Expanded Safety, Acceptability and Preliminary Effectiveness of Carraguard™ (PC-515) in Preventing STI/HIV Transmission
The primary aims of the study were to assess the safety and acceptability of Carraguard ™
(PC-515) when applied vaginally at least three times weekly for 6-12 months. Secondary aims
were to gather preliminary data on Carraguard's effectiveness in preventing male-to-female
transmission of HIV.
The hypothesis was that Carraguard would cause little or no significant irritation, including
lesions; that women would find Carraguard acceptable. The study was not powered to determine
effectiveness, but based on safety, acceptability and feasibility parameters, the outcome of
the Phase 2 trial would enable a decision whether or not to proceed to a Phase 3 efficacy
trial.
Carraguard™ (PC-515), the Population Council's lead candidate microbicide, was tested in a triple-masked, randomized, placebo-controlled trial fielded in two sites in South Africa. The primary aims of the study were to assess Carraguard's safety (toxicity) - including signs of irritation, such as itching or burning; changes in vaginal flora; and incidence of abnormal external genital, vaginal, and cervical findings - when applied vaginally for durations of 6-12 months, and to evaluate several dimensions of the acceptability of Carraguard and placebo products. Secondary aims were to investigate whether study participants using Carraguard had lower rates of HIV seroconversion or other sexually transmitted infections (including C. trachomatis, N. gonorrhoeae, T. vaginalis, and T. pallidum) than the placebo (methyl cellulose gel). In addition, when it began, this trial was the first to explore the feasibility of large-scale microbicides testing in a non-sex worker population. Last, the trial gauged women's reactions to using a non-contraceptive product (in vitro testing had shown that Carraguard has no contraceptive effect), as well as potential use-dynamics in communities where drying agents and other traditional vaginal products are used with high frequency. ;
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