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Anti-SARS-CoV-2 IgG antibodies pre- and post-vaccination behavior in health workers from a Guatemalan cancer center.
Carías-Alvarado, César C; López-Hun, Francisco; Valvert, Fabiola; Barrios-Menéndez, Juan C; Kihn-Alarcón, Alba; Falla, Vicky de; Xu, Ximing; Escobar-Castro, Karla.
  • Carías-Alvarado CC; Cancer Biological Research Laboratory, Liga Nacional Contra el Cáncer-Instituto de Cancerología, Guatemala, Guatemala.
  • López-Hun F; Cancer Biological Research Laboratory, Liga Nacional Contra el Cáncer-Instituto de Cancerología, Guatemala, Guatemala.
  • Valvert F; Cancer Biological Research Laboratory, Liga Nacional Contra el Cáncer-Instituto de Cancerología, Guatemala, Guatemala.
  • Barrios-Menéndez JC; Cancer Biological Research Laboratory, Liga Nacional Contra el Cáncer-Instituto de Cancerología, Guatemala, Guatemala.
  • Kihn-Alarcón A; Department of Research, Liga Nacional Contra el Cáncer-Instituto de Cancerología, Guatemala, Guatemala.
  • Falla V; Department of Research, Liga Nacional Contra el Cáncer-Instituto de Cancerología, Guatemala, Guatemala.
  • Xu X; Cancer Center, Renmin Hospital, Wuhan University, Wuhan, China.
  • Escobar-Castro K; Clinical Laboratory, Liga Nacional Contra el Cáncer-Instituto de Cancerología, Guatemala, Guatemala.
Gac Med Mex ; 158(2): 78-82, 2022.
Article in English | MEDLINE | ID: covidwho-1934905
ABSTRACT

INTRODUCTION:

The study of anti-SARS-CoV-2 IgG antibodies allows asymptomatic individuals with COVID-19 to be identified, and post-infection and post-vaccination immunity status to be evaluated.

OBJECTIVE:

To know the behavior of anti-SARS-CoV-2 IgG antibodies before and after vaccination in workers of a cancer center.

METHODS:

Prior to the application of the vaccine, the presence of anti-SARS-CoV-2 IgG antibodies (n = 171) was analyzed by evaluating anti-N IgG antibodies; post-vaccination, after receiving the second dose, anti-S IgG antibodies were evaluated (n = 60).

RESULTS:

Prior to vaccination, IgG antibodies were present in 18.71% of participants; they were detected in 65.22% of those with prior history of COVID-19 diagnosis and in 11.49% of those without it. The positions with the highest prevalence were nurses (28.26%), paramedics (27.59%) and administrative workers (27.78%), p < 0.01. Anosmia, ageusia and chest tightness were associated with the presence of IgG (p < 0.05). Post-vaccination, all participants developed IgG antibodies; people with a previous COVID-19 diagnosis had higher titers 10,277 vs. 6,819 AU/mL, p < 0.001.

CONCLUSIONS:

The study of anti-SARS-CoV-2 IgG antibodies allowed asymptomatic health workers to be identified. A high percentage of participants with prior COVID-19 diagnosis had antibodies. All participants developed IgG antibodies after vaccination, with higher titers being identified in those with previous infection.
RESUMEN

INTRODUCCIÓN:

El estudio de anticuerpos IgG anti-SARS-CoV-2 permite identificar individuos asintomáticos con COVID-19 y evaluar la inmunidad posinfección y posvacunación.

OBJETIVO:

Conocer el comportamiento de los anticuerpos IgG anti-SARS-CoV-2 pre y posvacunación en trabajadores de un centro oncológico.

MÉTODOS:

Antes de aplicar la vacuna se analizaron los anticuerpos IgG anti-SARS-CoV-2 (n = 171) con la evaluación de IgG anti-N; después de la segunda dosis se evaluó IgG anti-S (n = 60).

RESULTADOS:

Prevacunación, los anticuerpos IgG estaban presentes en 18.71 % de los participantes; se detectaron en 65.22 % de aquellos con antecedente de diagnóstico de COVID-19 y en 11.49 % de aquellos sin antecedentes. Los profesiones con mayor prevalencia fueron enfermeros (28.26 %), paramédicos (27.59 %) y administrativos (27.78 %), p < 0.01. La anosmia, ageusia y opresión en el pecho se asociaron a la presencia de IgG (p < 0.05). Posvacunación, todos los participantes desarrollaron IgG; las personas con diagnóstico previo de COVID-19 presentaron mayores títulos 10 277 versus 6819 UA/mL, p < 0.001.

CONCLUSIONES:

El estudio de anticuerpos IgG anti-SARS-CoV-2 permitió identificar a trabajadores de salud asintomáticos. Un alto porcentaje de los participantes con diagnóstico previo de COVID-19 presentó anticuerpos. Todos los participantes desarrollaron anticuerpos IgG posvacunación; las personas con infección previa presentaron una cuantificación más alta de títulos.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Severe acute respiratory syndrome-related coronavirus / COVID-19 / Neoplasms Type of study: Diagnostic study / Experimental Studies / Observational study / Prognostic study Topics: Vaccines Limits: Humans Country/Region as subject: Central America / Guatemala Language: English Journal: Gac Med Mex Year: 2022 Document Type: Article Affiliation country: GMM.M22000645

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Severe acute respiratory syndrome-related coronavirus / COVID-19 / Neoplasms Type of study: Diagnostic study / Experimental Studies / Observational study / Prognostic study Topics: Vaccines Limits: Humans Country/Region as subject: Central America / Guatemala Language: English Journal: Gac Med Mex Year: 2022 Document Type: Article Affiliation country: GMM.M22000645