Differences in SARS-COV-2 seroprevalence in the population of Cusco, Peru

Charles Huamaní, Fátima Concha-Velasco, Lucio Velásquez, María K. Antich, Johar Cassa, Kevin Palacios, Luz Bernable-Villasante, Guido Giraldo-Alencastre, Eduarda Benites-Calderon, Sebastian Mendieta-Nuñez, Heber Quispe-Jihuallanca, Matilde Quispe-Yana, Karla Zavala-Vargas, Liesbeth Hinojosa-Florez, Javier Ramírez-Escobar, Juan Spelucin-Runciman, Antonio Bernabe-Ortiz

Research output: Contribution to journalArticlepeer-review

Abstract

Background: The spread of the coronavirus disease 2019 (COVID-19) in Peru has been reported at the regional level, few studies have evaluated its spread at the provincial level, in which the mechanisms could be different. Methods: We conducted an analytical, cross-sectional, multistage observational population study to assess the seroprevalence of SARS-COV-2 at the provincial and urban/rural levels in a high-altitude setting. The sampling unit was the household, including a randomly selected family member. Sampling was performed using a data collection sheet on clinical and epidemiological variables. Chemiluminescence tests were used to detect total anti-SARS-COV-2 antibodies (IgG and IgM simultaneously). The percentages were adjusted to the sampling design. Results: The overall prevalence in the region of Cusco was 25.9%, with considerably different prevalence between the 13 provinces (from 15.9% in Acomayo to 40.1% in Canchis) and between rural (21.1%) and urban (31.7%) areas. In multivariable model, living in a rural area was a protective factor (adjusted prevalence ratio [aPR], 0.68; 95% confidence interval [CI], 0.61–0.76). Conclusions: Geographic diversity and population density determine different prevalence rates, typically lower in rural areas, possibly due to natural social distancing or limited interaction with people at risk.

Original languageEnglish
Article number100131
JournalGlobal Epidemiology
Volume7
DOIs
StatePublished - Jun 2024

Keywords

  • COVID-19
  • SARS-CoV-2
  • Seroprevalence

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