Immune Response of Asymptomatic EHPAD Employees Infected With COVID-19 (SERASYMPTO)
Kinetic of Humoral Immune Response of Asymptomatic Nursing Homes (EHPAD) Employees Infected With Severe Acute Respiratory Syndrome Coronavirus : a Case Control Study
The investigators performed in April 2020, a screening campaign of asymptomatic staff working in elderly nursing homes in Paris France (EHPAD), where the virus had been circulating actively in March and April 2020. Among 241 employees tested in four nursing homes, 32 (13.2%) were asymptomatic carriers of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-Cov-2).
Few data are available concerning the humoral immune response of asymptomatic carriers, the elicitation and duration of neutralizing antibodies and the duration of protection.
The purpose of the study is to determine whether these asymptomatic persons develop a humoral immune response, whether this immune response is durable and whether it is protective against the risk of reinfection
Descripción general del estudio
Descripción detallada
The investigators performed in April 2020, a screening campaign of asymptomatic staff working in elderly nursing homes in Paris, France, where the virus had been circulating actively in March and April 2020. Among 241 employees tested in four nursing homes, 32 (13.2%) were asymptomatic carriers of SARS-Cov-2.
Few data are available concerning the humoral immune response of asymptomatic carriers, the elicitation and duration of neutralizing antibodies and the duration of protection.
The main objective of this study is to describe the SARS-Cov-2 asymptomatic employees with positive immunoglobulin G (igG) serology at month 1-2 post infection.
Secondary objectives are
- To describe the proportion of asymptomatic persons with SARS-Cov-2 antibodies month 3 and 6 post infection
- To compare the proportion of persons with SARS-Cov-2 antibodies between asymptomatic and asymptomatic carriers at M1-2 post infection, M3 and M6 post infection
- To determine the factors associated with the appearance of antibodies ( viral load, age, sex, previous history, habitus..)
- To study the neutralizing capacities and immune-profiling of SARS-Cov-2 antibodies in vitro
- To evaluate the occurrence of Coronavirus Disease 2019 (COVID-19) reinfections in asymptomatic carriers during the second wave.
The design will be a case control study between
- Cases: SARS-Cov-2 asymptomatic nursing homes employees
- Controls: cohort of patients with a symptomatic COVID-19, preferably recruited in nursing homes or in case of difficulties in the virology service of COCHIN Hospital.
Tipo de estudio
Fase
- No aplica
Contactos y Ubicaciones
Ubicaciones de estudio
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Paris, Francia, 75004
- Hotel Dieu Hospital
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Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Descripción
Common inclusion criteria:
- Age ≥ 18.
- Health care employees working in the EHPAD who consulted in the Hotel Dieu Hospital
- Affiliated with a health insurance
- Informed information and consent
Inclusion Criteria for Cases (asymptomatic COVID-19 patients) :
- Health care workers screened SARS-Cov-2 positive for NASopharyngeal swaths during screening campaigns for EHPAD staff.
- Having carried out a follow-up serology (M1 and M2) within the Hotel Dieu.
- Having never developed symptoms of COVID-19 or have developed some symptoms undetected before screening: fever, transient fatigue, rhinorrhea, symptoms that may be mistaken for a common winter cold (no respiratory symptoms or prolonged fever)
Inclusion criteria for controls (symptomatic COVID-19 patients) :
- Health care workers tested positive for polymerase chain reaction assay (PCR) SARS-Cov-2 during screening campaigns for EHPAD staff at the Hotel Dieu.
- Having carried out a follow-up serology (M1 and M2) within the Hotel Dieu.
COVID-19 symptoms defined by:
- At least two major signs of COVID-19 among: > fever, cough, chest tightness, bilateral pneumonia, anosmia, loss of taste.
- or a major sign and three minor signs among: headache, severe fatigue, diarrhea, odynophagia, rhinorrhea, suggestive skin signs.
It is part of the database of the virology department of Cochin Hospital (in case of failure to recruit health care workers in the EHPADs).
*Exclusion criteria :
- Refuse to participate or inability to obtain informed consent.
- under guardianship, curators
- negative SARS-COV-2 PCR
- Pregnancy
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Poner en pantalla
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Ninguno (etiqueta abierta)
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
|---|---|
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Otro: Cases
SARS-Cov-2 asymptomatic nursing homes employees
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serology at M3 and serology at M6
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Otro: Controls
cohort of patients with a symptomatic COVID-19, preferably recruited in nursing homes or in case of difficulties in the virology service of COCHIN Hospital.
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serology at M3 and serology at M6
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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rate of positive IgG serology
Periodo de tiempo: month 1-2 post infection
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positive IgG (Immunoglobulin G) SARS-Cov-2 serology after infection of asymptomatic employees
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month 1-2 post infection
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Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
|
rate of positive IgG serology
Periodo de tiempo: month 3-6 post infection
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positive IgG (Immunoglobulin G) SARS-Cov-2 serology after infection of asymptomatic employees
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month 3-6 post infection
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rate of positive immunoglobulin M (IgM) serology
Periodo de tiempo: month 1-2-3 and 6 post infection
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positive IgM SARS-Cov-2 serology after infection of asymptomatic employees
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month 1-2-3 and 6 post infection
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rate of neutralizing antibodies
Periodo de tiempo: month 1-2-3 and 6 post infection
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concentration of neutralizing antibodies
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month 1-2-3 and 6 post infection
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questionnaire
Periodo de tiempo: month 1-2-3 and 6 post infection
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Associated factors with the presence of antibodies
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month 1-2-3 and 6 post infection
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re infection
Periodo de tiempo: through study completion, an average of 8 months
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of asymptomatic patients with SARS-Cov-2
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through study completion, an average of 8 months
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Colaboradores e Investigadores
Patrocinador
Colaboradores
Investigadores
- Investigador principal: Dominique Salmon, MD, PhD, Assistance Publique - Hôpitaux de Paris
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Finalización primaria (Actual)
Finalización del estudio (Actual)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Actual)
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- APHP201253
- 2020-A01833-36 (Otro identificador: ID-RCB)
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
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