COVID-19 SEROPREVALENCE AMONG ROYAL THAI ARMY PERSONNEL IN BANGKOK METROPOLITAN AREA FROM JULY-SEPTEMBER 2020

  • Nakarin Sansanayudh Armed Forces Research Institute of Medical Sciences, Royal Thai Army Medical Department, Bangkok, Thailand
  • Khunakorn Kana Armed Forces Research Institute of Medical Sciences, Royal Thai Army Medical Department, Bangkok, Thailand
  • Nitiya Asavikool Armed Forces Research Institute of Medical Sciences, Royal Thai Army Medical Department, Bangkok, Thailand
  • Sumalee Phajan Armed Forces Research Institute of Medical Sciences, Royal Thai Army Medical Department, Bangkok, Thailand
  • Maneerat Somsri Armed Forces Research Institute of Medical Sciences, Royal Thai Army Medical Department, Bangkok, Thailand
  • Surachai Rusamegevanon Armed Forces Research Institute of Medical Sciences, Royal Thai Army Medical Department, Bangkok, Thailand
  • Thanainit Chotanaphuti Armed Forces Research Institute of Medical Sciences, Royal Thai Army Medical Department, Bangkok, Thailand
Keywords: COVID-19 infection, Military personnel, Bangkok Metropolitan Area

Abstract

Background: COVID-19 is an ongoing pandemic that causes millions of deaths worldwide. Seroprevalence studies play a crucial role in identifying asymptomatic infection and providing the true prevalence of COVID-19 in the community. However, no COVID-19 seroprevalence in Thailand has been reported before.

Objective: The study aimed to measure the prevalence of the SARS-CoV-2 antibody among army personnel residing in the Bangkok Metropolitan Area.

Methods: All army personnel receiving health checkups from 1 July - 30 September 2020 were invited to participate in the study after providing informed consent. The seroprevalence was conducted using leftover serum without additional venipuncture. The screening conducted using the Rapid test by Wondfo®. When a screening test was positive, a confirmation test would be performed using ELISA by EuroImmun®. In case of a positive ELISA confirmation test result, the COVID-19 investigation team would be activated and deployed.

Results: In all, 6,651 army personnel participated in this study. The age of participants ranged from 20-60 years with mean age of 40.5+12.02. Most participants were male (85.5%). The rapid screening test using Wondfo® was positive in 41 cases (0.61%). The confirmation test using ELISA yielded a positive result in 1 subject (0.015%). That person was a known case of COVID-19 infection, who received a full course of treatment and was confirmed to have negative RT-PCR before being discharged from the hospital a few weeks earlier.

Conclusion: This was the first large scale seroprevalence surveillance of COVID-19 in Thailand. Our study revealed no new detectable case of asymptomatic COVID-19 infection in the Bangkok Metropolitan Area.

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Map of Bangkok Metropolitan Area and location of army units participating in this study
Published
2020-12-26
How to Cite
1.
Sansanayudh N, Kana K, Asavikool N, Phajan S, Somsri M, Rusamegevanon S, Chotanaphuti T. COVID-19 SEROPREVALENCE AMONG ROYAL THAI ARMY PERSONNEL IN BANGKOK METROPOLITAN AREA FROM JULY-SEPTEMBER 2020. J Southeast Asian Med Res [Internet]. 2020Dec.26 [cited 2022Aug.13];4(2):67-4. Available from: https://www.jseamed.org/index.php/jseamed/article/view/76
Section
Original Articles