High-resolution spatiotemporal analysis of chikungunya epidemics between 2019 and 2020 in Salvador, Brazil: a municipality-level transmission dynamics study.

ABSTRACT:

Background

Chikungunya virus (CHIKV) continues to cause explosive epidemics in Brazil. We investigated its transmission dynamics in Salvador, Brazil, to understand the factors driving its reemergence and spread.

Methods

In this epidemiological study, we analyzed by census tracts the chikungunya cases reported in Salvador during the 2019-2020 epidemics. We used SaTScan software to identify spatiotemporal clusters and assessed how census tract characteristics (socioeconomic, environmental, and prior chikungunya occurrence) influenced chikungunya incidence through a Bayesian spatial model using Integrated Laplace Approximation (INLA).

Findings

Citywide, 19,129 cases (mean age: 40.2, range: 0-112; male: 41.8%, female: 58.0%, non-binary: 0.2%) were reported between 2016 an

SUBMITTER: Argibay HD 

PROVIDER: S-EPMC11804771 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature