• BMC pulmonary medicine · Jul 2020

    SARS-CoV-2 specific serological pattern in healthcare workers of an Italian COVID-19 forefront hospital.

    • Giovanni Sotgiu, Alessandra Barassi, Monica Miozzo, Laura Saderi, Andrea Piana, Nicola Orfeo, Claudio Colosio, Giovanni Felisati, Matteo Davì, Alberto Giovanni Gerli, and Stefano Centanni.
    • Clinical Epidemiology and Medical Statistics Unit, Department of Medical, Surgical, Experimental Sciences, University of Sassari, Sassari, Italy. gsotgiu@uniss.it.
    • BMC Pulm Med. 2020 Jul 29; 20 (1): 203.

    BackgroundCOVID-19 is an infectious disease caused by a novel coronavirus (SARS-CoV-2). The immunopathogenesis of the infection is currently unknown. Healthcare workers (HCWs) are at highest risk of infection and disease. Aim of the study was to assess the sero-prevalence of SARS-CoV-2 in an Italian cohort of HCWs exposed to COVID-19 patients.MethodsA point-of-care lateral flow immunoassay (BioMedomics IgM-IgG Combined Antibody Rapid Test) was adopted to assess the prevalence of IgG and IgM against SARS-CoV-2. It was ethically approved ("Milano Area 1" Ethical Committee prot. n. 2020/ST/057).ResultsA total of 202 individuals (median age 45 years; 34.7% males) were retrospectively recruited in an Italian hospital (Milan, Italy). The percentage (95% CI) of recruited individuals with IgM and IgG were 14.4% (9.6-19.2%) and 7.4% (3.8-11.0%), respectively. IgM were more frequently found in males (24.3%), and in individuals aged 20-29 (25.9%) and 60-69 (30.4%) years. No relationship was found between exposure to COVID-19 patients and IgM and IgG positivity.ConclusionsThe present study did show a low prevalence of SARS-CoV-2 IgM in Italian HCWs. New studies are needed to assess the prevalence of SARS-CoV-2 antibodies in HCWs exposed to COVID-19 patients, as well the role of neutralizing antibodies.

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