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Konstantinidis T, Zisaki S, Mitroulis I, Cassimos D, Nanousi I, Kontekaki EG, Petrakis V, Parrisi K, Fotiadou E, Linardou A, Lemonakis N, Grapsa A, Gioka T, Lazidis L, Papagoras C, Tsigalou C, Panagopoulos P, Skendros P, Martinis G, Panopoulou M. Prevalence of anti-SARS-CoV-2 IgG antibodies in a group of patients, a control group, and healthcare workers of Thrace area in Greece, by the use of two distinct methods. Germs 2021; 11:372-380. [PMID: 34722359 DOI: 10.18683/germs.2021.1274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 06/11/2021] [Accepted: 08/01/2021] [Indexed: 11/08/2022]
Abstract
Introduction The aim of this study was to assess the clinical performance of different automated immunoassays available in Europe to detect anti-SARS-CoV-2 antibodies; an ELISA assay and a CLIA. The second goal was to estimate the seroprevalence of SARS-CoV-2 antibodies among healthcare workers in Evros area during the first pandemic wave of COVID-19. Methods The study included serum samples from 101 patients with confirmed COVID-19 by RT-PCR and 208 negative patients. Furthermore, it included 1036 healthcare workers (HWs) of the Evros Region, Northern Greece. The measurement of anti-SARS-CoV-2 antibodies was performed using the Abbott SARS-CoV-2 IgG and anti-SARS-CoV-2 ELISA IgG assay (Epitope Diagnostics, USA). Results Of 101 confirmed COVID-19 patients, 82 were hospitalized and 19 were outpatients. Hospitalized patients had higher IgG levels in comparison to outpatients (6.46±2.2 vs. 3.52±1.52, p<0.001). Of 208 non-COVID-19 patients only 1 was positive in both ELISA and CLIA assay. SARS-CoV-2-IgG antibodies were detected in 6 HWs out of 1036 (0.58%) with mean S/CO-value of anti-SARS-CoV-2 IgG 3.12±1.3 (confidence interval 0.95), which was lower than in COVID-19 patients (3.12 vs. 5.9; p=0.016). The clinical evaluation of two immunoassays showed remarkably high true positivity rates in the confirmed COVID-19 patients. Sensitivities obtained with CLIA and ELISA methods were 99.02% vs. 97.09% and specificities 99.52% vs 99.05% respectively. Conclusions We found an acceptable accordance between CLIA and ELISA assays in the confirmed COVID-19 patients. In all subjects included in this study in the past medical history, the information that was obtained included details about the presence of autoimmune diseases.
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Affiliation(s)
- Theocharis Konstantinidis
- MD, PhD, Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece, Laboratory of Microbiology, Democritus University of Thrace, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
| | - Stavroula Zisaki
- MSc, Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
| | - Ioannis Mitroulis
- MD, PhD, First Department of Internal Medicine, Democritus University of Thrace, Dragana Campus, 68100 Alexandroupolis, Greece
| | - Dimitrios Cassimos
- MD, PhD, Pediatric Department, Democritus University of Thrace, Dragana Campus, 68100 Alexandroupolis, Greece, Alexandroupolis
| | - Ioanna Nanousi
- MSc, Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
| | - Eftychia G Kontekaki
- MD, Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
| | - Vasilis Petrakis
- MD, Second Department of Internal Medicine, Democritus University of Thrace, Dragana Campus, 68100 Alexandroupolis, Greece, Alexandroupolis
| | - Kalliopi Parrisi
- Ms, Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
| | - Eleni Fotiadou
- Ms, Laboratory of Microbiology, Democritus University of Thrace, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
| | - Aikaterini Linardou
- Ms, Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
| | - Nikolaos Lemonakis
- MSs, Laboratory of Microbiology, Democritus University of Thrace, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
| | - Anastasia Grapsa
- MD, Laboratory of Microbiology, Democritus University of Thrace, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
| | - Theodora Gioka
- MD, Laboratory of Microbiology, Democritus University of Thrace, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
| | - Leonidas Lazidis
- MD, Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
| | - Charalampos Papagoras
- MD, PhD, First Department of Internal Medicine, Democritus University of Thrace, Dragana Campus, 68100 Alexandroupolis, Greece, Alexandroupolis
| | - Chistina Tsigalou
- MD, PhD, Laboratory of Microbiology, Democritus University of Thrace, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
| | - Periklis Panagopoulos
- MD, PhD, Second Department of Internal Medicine, Democritus University of Thrace, Dragana Campus, 68100 Alexandroupolis, Greece, Alexandroupolis
| | - Panagiotis Skendros
- MD, PhD, First Department of Internal Medicine, Democritus University of Thrace, Dragana Campus, 68100 Alexandroupolis, Greece, Alexandroupolis
| | - Georges Martinis
- MD, Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
| | - Maria Panopoulou
- MD, PhD, Laboratory of Microbiology, Democritus University of Thrace, Universit y General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece
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Konstantinidis TG, Zisaki S, Mitroulis I, Konstantinidou E, Kontekaki EG, Romanidou G, Karvelas A, Nanousi I, Lazidis L, Cassimos D, Tsigalou C, Martinis G, Panopoulou M. Levels of Produced Antibodies after Vaccination with mRNA Vaccine; Effect of Previous Infection with SARS-CoV-2. J Clin Med 2021; 10:jcm10132842. [PMID: 34199029 PMCID: PMC8268570 DOI: 10.3390/jcm10132842] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/22/2021] [Accepted: 06/23/2021] [Indexed: 12/20/2022] Open
Abstract
The aim of this study was to estimate the immunogenic effect of mRNA vaccine against SARS-CoV-2. This study included 510 participants who received mRNA vaccine. The measurement of anti-COVID-19 antibodies was performed using the Abbott SARS-CoV-2 IgG quantitative assay (Abbott). Overall, mean titer of anti-Spike antibodies was 19,319.2 ± 1787.5 AU/mL. Vaccination induced a robust immunogenic response in those previously infected with SARS-CoV-2 compared with non-infected subjects. Additionally, individuals that were asymptomatic after vaccination produced lower levels of antibodies compared to feverish individuals. In conclusion, remarkably high levels of anti-Spike COVID-19 antibodies were observed after vaccination.
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Affiliation(s)
- Theocharis G. Konstantinidis
- Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece; (S.Z.); (E.G.K.); (I.N.); (L.L.); (G.M.)
- Laboratory of Microbiology, Democritus University of Thrace, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece; (A.K.); (C.T.); (M.P.)
- Correspondence: ; Tel.: +30-2551352005
| | - Stavroula Zisaki
- Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece; (S.Z.); (E.G.K.); (I.N.); (L.L.); (G.M.)
| | - Ioannis Mitroulis
- First Department of Internal Medicine, Democritus University of Thrace, 68100 Alexandroupolis, Greece;
| | | | - Eftychia G. Kontekaki
- Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece; (S.Z.); (E.G.K.); (I.N.); (L.L.); (G.M.)
| | - Gioulia Romanidou
- Nephrology Department, General Hospital “Sismanogleio”, 69100 Komotini, Greece;
| | - Alexandros Karvelas
- Laboratory of Microbiology, Democritus University of Thrace, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece; (A.K.); (C.T.); (M.P.)
| | - Ioanna Nanousi
- Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece; (S.Z.); (E.G.K.); (I.N.); (L.L.); (G.M.)
| | - Leonidas Lazidis
- Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece; (S.Z.); (E.G.K.); (I.N.); (L.L.); (G.M.)
| | - Dimitrios Cassimos
- Pediatric Department, Democritus University of Thrace, 68100 Alexandroupolis, Greece;
| | - Christina Tsigalou
- Laboratory of Microbiology, Democritus University of Thrace, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece; (A.K.); (C.T.); (M.P.)
| | - Georges Martinis
- Blood Transfusion Center, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece; (S.Z.); (E.G.K.); (I.N.); (L.L.); (G.M.)
| | - Maria Panopoulou
- Laboratory of Microbiology, Democritus University of Thrace, University General Hospital of Alexandroupolis Dragana Campus, 68100 Alexandroupolis, Greece; (A.K.); (C.T.); (M.P.)
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