🔬 Discovery

Mwanza trial: treating sexually transmitted infections reduces HIV

Ensayo de Mwanza: tratar las infecciones de transmisión sexual reduce el VIH

Date
1991-1995 · confidence high
Place
Mwanza, Tanzania
Credited to
Heiner Grosskurth, Gina Mosha, Richard Hayes and the Mwanza Intervention Trial
Field
Life & health

What was discovered

A community trial in eight communities that showed syndromic management of sexually transmitted infections cut HIV incidence by about 40%. It was the first prevention intervention with proven efficacy against HIV.

Published in The Lancet (1995, 42% reduction). Later trials in Rakai and Masaka (Uganda) did not confirm the effect, qualifying its generalisation to more advanced epidemics.

What it led to

  • STI care programmes for HIV prevention in Africa
  • later re-evaluation with negative trials in Rakai and Masaka
  • evidence for the design of randomised community interventions

Links

Sources✓ verified 2026-11-04