Enhancing insights in sexually transmitted infection mapping: Syphilis in Forsyth County, North Carolina, a case study

Lani Fox ^1,2, William C Miller ³, Dionne Gesink ⁴

⁰Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, North Carolina, United States of America.

Plos Computational Biology +

|

October 31, 2024

View abstract on PubMed

Summary

This study introduces advanced spatial analysis methods to accurately map syphilis outbreaks, improving prediction by 5-26% over traditional approaches for targeted public health interventions.

Area Of Science

Epidemiology
Spatial Analysis
Public Health

Background

Forsyth County, NC, saw a four-fold syphilis increase (2008-2011), reaching over 35 cases/100,000.
This rate mirrors the 2021 North Carolina state syphilis rate.
Traditional methods struggle with spatial data resolution and accuracy.

Purpose Of The Study

To develop and validate an enhanced spatial methodology for syphilis surveillance.
To improve the accuracy and interpretability of syphilis outbreak mapping.
To provide more effective geographical insights for public health interventions.

Main Methods

Utilized donut geomasking for enhanced spatial resolution and patient privacy.
Employed a moving window uniform grid to address the modifiable areal unit problem and edge effects.
Applied Uniform Model Bayesian Maximum Entropy (UMBME) to mitigate the "small number problem".

Main Results

The combined methodology achieved 5-26% greater accuracy in predicting latent syphilis rates compared to traditional methods.
Identified and removed 'kriging islands,' reducing background incidence to zero.
Relocated nine outbreak hotspots to more accurate geographical locations and elucidated hotspot connectivity.

Conclusions

The novel spatial analysis approach significantly enhances syphilis outbreak prediction and mapping accuracy.
This method provides more realistic geographical patterns crucial for targeted public health strategies.
Understanding localized transmission dynamics is key, even with changing partnership selection behaviors.

Related Concept Videos

Sexually Transmitted Infections

Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...