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  1. Article ; Online: Seroprevalence of Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) infection in an Italian cohort in Marche Region, Italy.

    De Santi, Mauro / Diotallevi, Aurora / Brandi, Giorgio

    Acta bio-medica : Atenei Parmensis

    2021  Volume 92, Issue 1, Page(s) e2021070

    Abstract: ... professions.: Methods: Serological samples of 341 volunteers in a cohort in Marche Region, Italy, were ... the seroconversion of SARS-CoV-2 antibodies to find predictors of infection in terms of symptoms, health status, and ... Background and aim: The COVID-19 is an infectious disease caused by the novel coronavirus SARS-CoV ...

    Abstract Background and aim: The COVID-19 is an infectious disease caused by the novel coronavirus SARS-CoV-2, declared a public health emergency by the World Health Organization. In this study, we evaluated the seroconversion of SARS-CoV-2 antibodies to find predictors of infection in terms of symptoms, health status, and professions.
    Methods: Serological samples of 341 volunteers in a cohort in Marche Region, Italy, were analyzed for the presence of IgM and/or IgG immunoglobulins specific for the SARS-CoV-2. Contextually, an anamnestic questionnaire was administered. The binary logistic regression analysis was used to find the predictors of seroconversion.
    Results: Forty-nine subjects (14.4 %) were found positive, without significant differences between gender and age groups. The predictors identified inside the variable categories "symptoms," "risk factors" (smoking habit and established pathologies), and "professions" were the loss of taste and smell (OR, 8.563), cardiovascular diseases (OR, 2.912), and policeman profession (OR, 3.875), respectively.
    Conclusions: Although the limited number of subjects recruited in this study, our results could give important findings to be considered for planning preventive strategies in the view of the next COVID-19 waves.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Antibodies, Viral/blood ; COVID-19/epidemiology ; Cohort Studies ; Female ; Humans ; Immunoglobulin G/blood ; Immunoglobulin M/blood ; Italy/epidemiology ; Male ; Middle Aged ; SARS-CoV-2/immunology ; Seroepidemiologic Studies ; Young Adult
    Chemical Substances Antibodies, Viral ; Immunoglobulin G ; Immunoglobulin M
    Language English
    Publishing date 2021-01-25
    Publishing country Italy
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2114240-3
    ISSN 2531-6745 ; 0392-4203
    ISSN (online) 2531-6745
    ISSN 0392-4203
    DOI 10.23750/abm.v92i1.10847
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Seroprevalence of SARS-CoV-2 in blood donors from the Lodi Red Zone and adjacent Lodi metropolitan and suburban area.

    Cassaniti, Irene / Percivalle, Elena / Sarasini, Antonella / Cambiè, Giuseppe / Vecchio Nepita, Edoardo / Maserati, Roberta / Ferrari, Alessandro / Corcione, Alfonso / Di Martino, Raffaella / Bonetti, Alice / Di Napoli, Annapia / Ferrari, Guglielmo / Baldanti, Fausto

    Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases

    2021  Volume 27, Issue 6, Page(s) 914.e1–914.e4

    Abstract: Objectives: To define the seroprevalence of severe acute respiratory syndrome coronavirus 2 (SARS ... in Lombardy Region and the neighbouring area were analysed for SARS-CoV-2 IgG-specific antibodies during ... March to 24 June, 1922 blood donors were tested for the presence of SARS-CoV-2 IgG showing a prevalence ...

    Abstract Objectives: To define the seroprevalence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in blood donors (referred to the first lockdown area (Lodi Red-Zone) of the Lombardy region and in a contiguous area that was not included in the first lockdown); to define the agreement between a commercial serological assay and a reference microneutralization assay; and to evaluate the persistence of SARS-CoV-2 neutralizing antibodies in a cohort of blood donors.
    Methods: Blood donors referred to the first lockdown area in Lombardy Region and the neighbouring area were analysed for SARS-CoV-2 IgG-specific antibodies during the period 18 March to 24 June 2020. Serum samples were analysed using both a chemiluminescent immunoassay (LIAISON® SARS-CoV-2 S1/S2 IgG, DiaSorin) for the quantitative characterization of SARS-CoV-2 anti-S1 and anti-S2 IgG antibodies and a neutralizing antibodies (NT-Abs) assay.
    Results: In the period from 18 March to 24 June, 1922 blood donors were tested for the presence of SARS-CoV-2 IgG showing a prevalence of 378/1922 (19.7%). A subgroup of 1139 blood donors were tested in parallel with a SARS-CoV-2 IgG assay and a microneutralization assay showing a prevalence of 22.2% and 21.6%, respectively. SARS-CoV-2 IgG quantification was correlated with NT-Abs titres. In 78.2% of participants the NT-Abs titre was maintained, but in 15.8% it decreased by one four-fold dilution and in 6.0% it increased by one four-fold dilution.
    Conclusions: The duration of immunity of SARS-CoV-2 is crucial for the course of the pandemic and for this reason the monitoring of NT Abs is important. Despite a stable NT-Abs titre being observed in the majority of blood donors, our findings need to be validated in a long-term period of follow up.
    MeSH term(s) Antibodies, Neutralizing/blood ; Antibodies, Viral/blood ; Blood Donors ; COVID-19/epidemiology ; COVID-19/immunology ; COVID-19 Testing ; Cohort Studies ; Communicable Disease Control ; Humans ; Immunoglobulin G/blood ; Italy/epidemiology ; Prevalence ; SARS-CoV-2/immunology ; SARS-CoV-2/isolation & purification ; Seroepidemiologic Studies ; Serologic Tests
    Chemical Substances Antibodies, Neutralizing ; Antibodies, Viral ; Immunoglobulin G
    Language English
    Publishing date 2021-03-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 1328418-6
    ISSN 1469-0691 ; 1470-9465 ; 1198-743X
    ISSN (online) 1469-0691
    ISSN 1470-9465 ; 1198-743X
    DOI 10.1016/j.cmi.2021.01.030
    Database MEDical Literature Analysis and Retrieval System OnLINE

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