Sexually transmitted infections and migration in Uganda: a population-based study.

Area of Science:

• Epidemiology
• Public Health
• Infectious Diseases

Background:

• Migration in Africa is linked to increased HIV risk, yet data on non-HIV sexually transmitted infection (STI) prevalence among African migrants remain scarce.
• Understanding the burden of STIs in mobile populations is critical for effective public health strategies.

Purpose of the Study:

• To compare the prevalence of specific STIs between recent migrants and long-term residents in southern Uganda.
• To identify subgroups of migrants with a higher burden of STIs.

Main Methods:

• A cross-sectional population-based study in southern Uganda analyzed data from 1825 adults (aged 18-49) from the Sexually Transmitted Infection Prevalence Study.
• Migration history was defined as moving into the community within the last ~18 months.
• Modified Poisson regression models were used to compare STI prevalence, calculating adjusted prevalence risk ratios (adjPRRs) and 95% confidence intervals (CIs).

Main Results:

• Overall, 19.6% of participants were recent migrants. Migrants showed a significantly higher combined prevalence of curable STIs (gonorrhoea, chlamydia, high-titre syphilis, trichomoniasis) than long-term residents (34.4% vs 24.2%; adjPRR=1.23).
• This disparity was particularly pronounced among people living with HIV (49.4% vs 32.6%; adjPRR=1.42) and women (38.8% vs 27.8%; adjPRR=1.26).
• High-titre syphilis prevalence was notably higher in male migrants (11.2% vs 4.9%; adjPRR=1.82).

Conclusions:

• The study confirms a higher prevalence of non-HIV STIs among migrants in this Ugandan population.
• Developing tailored outreach and service delivery for mobile populations is crucial for integrated HIV and STI control.
• Optimizing resources and reducing transmission risks necessitate addressing the specific needs of mobile individuals.