Prevalence and Risk Factors of SARS-CoV-2 Antibody Responses (COVID-19)

Covid19 Clinical Trial

— SERO-MARES  

Official title:

Prevalence and Risk Factors of SARS-CoV-2 Antibody Responses and Assymptomatic Carriers Among a Cohort of 2,300 Healthcare Workers at the Consorci Sanitari Del Maresme (CSdM)

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT04425759
• Other study ID #: SERO-MARES (56/20)
• Status: Recruiting
• Start date: June 8, 2020
• Est. completion date: June 30, 2021

Study information

• Verified date: June 2020
• Source: Hospital de Mataró
• Contact: Pere Clavé, MD, PhD
• Phone: +34937417700
• Email: pere.clave[@]ciberehd.org
• Is FDA regulated: No
• Study type: Observational [Patient Registry]

Clinical Trial Summary

Observational and prospective study with one year of follow-up of the cohort of workers of the CSdM, including workers of subcontracted companies working in the Hospital of Mataró (2,300 workers approximately) and with controls at baseline and at 3, 6, 9 and 12 months. All CSdM workers will be invited to participate by e-mail and by announcements in the corporate website. A space will be set up on the corporate intranet where workers will be informed about the study, will be able to give their informed consent and will be able to answer an electronic questionnaire regarding socio-demographic, clinical and labour personal characteristics. Once the questionnaire answered, participants will be authorized to schedule a blood extraction. Prevalence of antibodies against SARS-CoV-2 will be analyzed (IgA, IgM, IgG). PCR will be also performed for IgM and IgA positive subjects.

Description:

• Study design: observational and prospective study with one year of follow-up of the cohort of workers of the CSdM, including workers of subcontracted companies working in the Hospital of Mataró (2,300 workers approximately) and with controls at baseline and at 3, 6, 9 and 12 months.

• Aims: to perform a universal test for all the professionals of the Consorci Sanitari del Maresme (CSdM) in order to carry out the following objectives:

1. Let them know if they have been exposed to the SARS-CoV-2 virus.

2. Identify asymptomatic carriers of SARS-CoV-2 virus.

3. Develop an immune map of all the professionals to: a) describe the seroprevalence of SARS-CoV-2 antibodies and their evolution over a year; b) help minimize the risk of infection in CSdM professionals; c) contribute to the improvement of knowledge about the infection and the social and occupational factors that affect its spread; and d) allow in the future to identify the duration of immunity against SARS-CoV-2.

• Time Frame: 1 year.

• Study population: all workers from the healthcare centers of the Consorci Sanitari del Maresme will be invited to participate by e-mail and by announcements in the corporate website. A space will be set up on the corporate intranet where workers will be informed about the study, will be able to give their informed consent and will be able to answer an electronic questionnaire regarding socio-demographic, clinical and labour personal characteristics. Once the questionnaire answered, participants will be authorized to schedule a blood extraction.

• Methods: Prevalence of antibodies against SARS-CoV-2 will be analyzed (IgA, IgM, IgG) and PCR will be also performed for IgM and IgA positive subjects following this algorithm:

Serological study:

1. Screening the entire population with total CLIA result (IgA, IgM, IgG) to determine negatives.

2. ELISA for positives with differentiated IgM, IgA and IgG results.

3. PCR of nasopharyngeal smears on all IgM and IgA + (to determine asymptomatic cases).

There will be other blood samplings and determination points at 3, 6, 9 and 12 months for all the study participants.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 2400
• Est. completion date: June 30, 2021
• Est. primary completion date: June 30, 2021
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• All the professionals working at the Consorci Sanitari del Maresme (approximately 2300 subjects).

Exclusion Criteria:

• None.

Related Conditions & MeSH terms

• Corona Virus Infection
• Coronavirus Infections
• COVID
• Covid19
• SARS-CoV 2
• Severe Acute Respiratory Syndrome

Intervention

Diagnostic Test:
• Blood sample
Blood sammples for the serological analysis will be collected at 0/90/180/270/360 days.

Locations

Country	Name	City	State
Spain	Hospital de Mataró	Mataró	Barcelona

Sponsors (1)

Lead Sponsor	Collaborator
Hospital de Mataró

Country where clinical trial is conducted

Spain, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Antibodies to SARS-CoV2: IgA, IgM, IgG	Screening for the entire population with total IgA, IgM, IgG to screen the negatives; ELISA for positives with differentiated IgM+IgA vs IgG specific for SARS-Cov-2 seroprevalence of SARS-CoV-2 antibodies and their evolution over a year; b) help minimize the risk of infection in CSdM professionals; c) contribute to the improvement of knowledge about the infection and the social and occupational factors that affect its spread; and d) allow in the future to identify the duration of immunity against SARS-CoV-2.	1 year
Primary	PCR of nasopharyngeal smears on all IgM +	To detect symptomatic or asymptomatic carriers; New diagnostics of COVID19 confirmed by PCR of nasopharyngeal smears	1 year