HIV type 1 subtypes in circulation in northern Kenya

Area of Science:

• * Virology
• * Epidemiology
• * Public Health

Background:

• * The genetic diversity of Human Immunodeficiency Virus type 1 (HIV-1) subtypes varies geographically.
• * Characterization of HIV-1 subtypes is crucial for understanding transmission dynamics and developing targeted interventions.
• * Limited data exists on HIV-1 genetic subtypes in northern Kenya, a region with significant cross-border interaction.

Purpose of the Study:

• * To partially sequence and analyze HIV-1 env gene fragments from samples collected in northern Kenya between 2003 and 2004.
• * To identify the dominant HIV-1 subtypes circulating in this specific region.
• * To investigate the potential influence of cross-border movements on HIV-1 subtype distribution.

Main Methods:

• * Collection of blood samples from 72 HIV-1-positive patients in northern Kenya (2003-2004).
• * Partial sequencing of the HIV-1 env gene.
• * Phylogenetic analysis to determine HIV-1 subtypes.

Main Results:

• * Subtype A was the most prevalent (50%), followed by Subtype C (39%) and Subtype D (11%).
• * HIV-1 subtypes A and C were identified as the dominant strains in northern Kenya.
• * The prevalence of subtype C in Moyale, a border town, aligns with Ethiopia's dominant subtype, suggesting cross-border influence.

Conclusions:

• * HIV-1 subtypes A and C are the predominant strains in northern Kenya.
• * Cross-border population movements significantly impact the circulation patterns of HIV-1 subtypes in the region.
• * Further research is needed to fully characterize HIV-1 diversity and inform public health strategies.