Seropositivity of SARS-CoV-2 in the Population of Kazakhstan: A Nationwide Laboratory-Based Surveillance

Yuliya Semenova, Zhanna Kalmatayeva, Ainash Oshibayeva, Saltanat Mamyrbekova, Aynura Kudirbekova, Ardak Nurbakyt, Ardak Baizhaxynova, Paolo Colet, Natalya Glushkova, Alexandr Ivankov, Antonio Sarria-Santamera

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The data on seroprevalence of anti-SARS-CoV-2 antibodies in Kazakhstani population are non-existent, but are needed for planning of public health interventions targeted to COVID-19 containment. The aim of the study was to estimate the seropositivity of SARS-CoV-2 infection in the Kazakhstani population from 2020 to 2021. We relied on the data obtained from the results from "IN VITRO" laboratories of enzyme-linked immunosorbent assays for class G immunoglobulins (IgG) and class M (IgM) to SARS-CoV-2. The association of COVID-19 seropositivity was assessed in relation to age, gender, and region of residence. Additionally, we related the monitoring of longitudinal seropositivity with COVID-19 statistics obtained from Our World in Data. The total numbers of tests were 68,732 for SARS-CoV-2 IgM and 85,346 for IgG, of which 22% and 63% were positive, respectively. The highest rates of positive anti-SARS-CoV-2 IgM results were seen during July/August 2020. The rate of IgM seropositivity was the lowest on 25 October 2020 (2%). The lowest daily rate of anti-SARS-CoV-2 IgG was 17% (13 December 2020), while the peak of IgG seropositivity was seen on 6 June 2021 (84%). A longitudinal serological study should be envisaged to facilitate understanding of the dynamics of the epidemiological situation and to forecast future scenarios.

Original languageEnglish
JournalInternational Journal of Environmental Research and Public Health
Volume19
Issue number4
DOIs
Publication statusPublished - Feb 17 2022

Keywords

  • Antibodies, Viral
  • COVID-19/epidemiology
  • Humans
  • Immunoglobulin M
  • Kazakhstan/epidemiology
  • Laboratories
  • SARS-CoV-2
  • Seroepidemiologic Studies

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