Corpus overview


Overview

MeSH Disease

Human Phenotype

Fever (15)

Cough (5)

Anosmia (4)

Dyspnea (3)

Pneumonia (3)


Transmission

Seroprevalence
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    Dynamic Change of COVID-19 Seroprevalence SERO among Asymptomatic TRANS Population in Tokyo during the Second Wave

    Authors: Sawako Hibino; Kazutaka Hayashida; Andrew C Ahn; Yasutaka Hayashida; Julia Bielicki; Tim Roloff; Roland Bingisser; Christian Nickel; Nina Khanna; Sarah Tschudin; Andreas Widmer; Katharina Rentsch; Hans Pargger; Martin Siegemund; Daiana Stolz; Michael Tamm; Stefano Bassetti; Michael Osthoff; Manuel Battegay; Adrian Egli; Hans H Hirsch; Christine Goffinet; Florian Kurth; Martin Witzenrath; Maria Theresa Völker; Sarah Dorothea Müller; Uwe Gerd Liebert; Naveed Ishaque; Lars Kaderali; Leif Erik Sander; Sven Laudi; Christian Drosten; Roland Eils; Christian Conrad; Ulf Landmesser; Irina Lehmann

    doi:10.1101/2020.09.21.20198796 Date: 2020-09-23 Source: medRxiv

    Importance: Fatality rates related to COVID-19 in Japan have been low compared to Western Countries and have decreased despite the absence of lockdown. Serological tests SERO monitored across the course of the second wave can provide insights into the population-level prevalence SERO and dynamic patterns of COVID-19 infection MESHD. Objective: To assess changes in COVID-19 seroprevalence SERO among asymptomatic TRANS employees working in Tokyo during the second wave. Design: We conducted an observational cohort study. Healthy volunteers working for a Japanese company in Tokyo were enrolled from disparate locations to determine seropositivity against COVID19 from May 26 to August 25, 2020. COVID-19 IgM and IgG antibodies SERO were determined by a rapid COVID19 IgM/IgG test kit using fingertip blood SERO. Across the company, tests were performed and acquired weekly. For each participant, serology tests were offered twice, separated by approximately a month, to provide self-reference of test results and to assess for seroconversion and seroreversion. Setting: Workplace setting within a large company. Participants: Healthy volunteers from 1877 employees of a large Japanese company were recruited to the study from 11 disparate locations across Tokyo. Participants having fever HP fever MESHD, cough HP cough MESHD, or shortness of breath MESHD at the time of testing were excluded. Main Outcome(s) and Measure(s): Seropositivity rate (SPR) was calculated by pooled data from each two-weeks window across the cohort. Either IgM or IgG positivity was defined as seropositive. Changes in immunological status against SARS-CoV-2 were determined by comparing results between two tests obtained from the same individual. Results: Six hundred fifteen healthy volunteers (mean + SD 40.8 + 10.0; range 19-69; 45.7 % female TRANS) received at least one test. Seroprevalence SERO increased from 5.8 % to 46.8 % over the course of the summer. The most dramatic increase in SPR occurred in late June and early July, paralleling the rise in daily confirmed cases TRANS within Tokyo, which peaked on August 4. Out of the 350 individuals (mean + SD 42.5 + 10.0; range 19-69; 46.0 % female TRANS) who completed both offered tests, 21.4 % of those individuals who tested seronegative became seropositive and seroreversion was found in 12.2 % of initially seropositive participants. 81.1% of IgM positive cases at first testing became IgM negative in approximately one month. Conclusions and Relevance: COVID-19 infection MESHD may have spread widely across the general population of Tokyo despite the very low fatality rate. Given the temporal correlation between the rise in seropositivity and the decrease in reported COVID-19 cases that occurred without a shut-down, herd immunity may be implicated. Sequential testing for serological SERO response against COVID-19 is useful for understanding the dynamics of COVID-19 infection at the population-level.

    Household transmission TRANS in people infected with SARS-CoV-2 (COVID-19) in Metropolitan Lima

    Authors: Yolanda Angulo-Bazán; Gilmer Solis; Joshi Acosta; Fany Cardenas; Ana Jorge; César Cabezas; Maria Jesus Alcaraz; Javier Buesa; Jesus Rodriguez-Diaz; Ron Geller; David Navarro; Maria Gabrani; Michal Rosen-Zvi

    doi:10.1101/2020.09.06.20189456 Date: 2020-09-09 Source: medRxiv

    Objective: Describe the characteristics of SARS-CoV-2 infection MESHD among household members with a confirmed primary case TRANS of COVID-19 in low burden districts in Metropolitan Lima. Materials and Methods: A retrospective, secondary database review study was conducted. The information was collected from an epidemiological surveillance activity in close contacts TRANS (co-inhabitants) in 52 households in Metropolitan Lima with only one member with COVID-19. A reevaluation was carried out in 10 households. Epidemiological and clinical variables were evaluated and its association with the result of the rapid serological test SERO (presence of IgG, IgM or both). Results: Secondary cases TRANS were found in 40 households, which represents an average of 49.9% identification per household. A secondary attack rate TRANS of 53.0% (125 cases) was found among cohabitants, with 77.6% of cases being symptomatic (symptomatic / asymptomatic TRANS ratio: 3.5). The presence of fever HP and / or chills HP was found in 40.0% of people with a positive result, followed by a sore throat, in 39.2%. Ageusia MESHD and anosmia HP anosmia MESHD were present in 22.4% and 20.8% of cases, respectively. A reevaluation in 40 family members TRANS 33.6 +/- 2.7 days after the first evaluation, show the persistence of positive IgM and IgG in the 20 positive cases in the first evaluation. Conclusion: Having a primary case TRANS of COVID-19 in home, the secondary attack rate TRANS of this infection MESHD is 53%; however, in a significant proportion of households evaluated there was no positive case, beyond the primary case TRANS. The epidemiological and clinical characteristics found in this case were in accordance with what has already been reported in other international series.

    Genetic testing and serological SERO screening for SARS-CoV-2 infection MESHD in a COVID-19 outbreak in a nursing facility in Japan

    Authors: Yong Chong; Naoki Tani; Hideyuki Ikematsu; Nobuto Terazawa; Hitoshi Nakashima; Nobuyuki Shimono; Koichi Akashi; Yosuke Tanaka

    doi:10.21203/rs.3.rs-64266/v1 Date: 2020-08-23 Source: ResearchSquare

    Background: The Pandemic of coronavirus disease MESHD (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 MESHD (SARS-CoV-2), has critically impacted the spread of infection within nursing facilities. We evaluated the usefulness of genetic and serological tests SERO conducted during a COVID-19 outbreak in a nursing facility in Japan.Methods: After the first identification of SARS-CoV-2 infection MESHD, a comprehensive, facility- and/or unit-wide PCR testing from nasopharyngeal swabs was repeatedly performed in a three-unit facility including 99 residents with dementia HP dementia MESHD and 53 healthcare personnel. Additionally, PCR testing was conducted separately for residents and staff with fever HP fever MESHD of ≥37.5 oC. Facility-wide serological testing SERO, including rapid kit testing and quantitative assay, was conducted twice over 1 month apart.Results: A total of 322 PCR and 257 antibody tests SERO were performed. 37 (24.3%) of the 152 individuals (25/99 residents, 25.3%; 12/53 staff, 22.6%) were identified as PCR-positive. Seven residents died with a mortality of 7.1% (7/99). Among the 37 individuals, 10 (27.0%) were asymptomatic TRANS at the time of testing. PCR positivity was concentrated on one unit (Unit 1) (20/30 residents, 66.7%; 9/14 staff, 64.3%). The other units showed a limited spread of infection MESHD. In unit-wide and separate tests, PCR positivity detection was highly prevalent (22.9% and 44.4%, respectively) in Unit 1, compared with that in the other units. Serological testing SERO identified two additional infected residents with a negative PCR result and showed that no staff was newly identified as infected.Conclusions: Thorough PCR testing, in combination with comprehensive and separate tests, is critical for managing COVID-19 outbreaks in nursing facilities, particularly, in units considered an epicenter. Serological testing SERO is also beneficial for tracing contacts TRANS, confirming the number of infected individuals, and authorizing the termination of the outbreak.

    High prevalence SERO of symptoms among Brazilian subjects with antibodies SERO against SARS-CoV-2: a nationwide household survey

    Authors: Ana Maria Baptista Menezes; Cesar G Victora; Fernando P Hartwig; Mariangela F Silveira; Bernardo L Horta; Aluisio J D Barros; Fernando C Whermeister; Marilia A Mesenburg; Lucia C Pellanda; Odir A Dellagostin; Claudio J Struchiner; Marcelo N Burattini; Fernando C Barros; Pedro C Hallal

    doi:10.1101/2020.08.10.20171942 Date: 2020-08-12 Source: medRxiv

    Since the beginning of the pandemic of COVID-19, there has been a widespread assumption that most infected persons are asymptomatic TRANS. A frequently-cited early study from China suggested that 86% of all infections MESHD were undocumented, which was used as indirect evidence that patients were asymptomatic TRANS. Using data from the most recent wave of the EPICOVID19 study, a nationwide household-based survey including 133 cities from all states of Brazil, we estimated the proportion of people with and without antibodies for SARS-CoV-2 SERO who were asymptomatic TRANS, which symptoms were most frequently reported, the number of symptoms reported and the association between symptomatology and socio-demographic characteristics. We were able to test 33,205 subjects using a rapid antibody test SERO that was previously validated. Information on symptoms was collected before participants received the test result. Out of 849 (2.7%) participants who tested positive for SARS-CoV-2 antibodies SERO, only 12.1% (95%CI 10.1-14.5) reported no symptoms since the start of the pandemic, compared to 42.2% (95%CI 41.7-42.8) among those who tested negative. The largest difference between the two groups was observed for changes in smell or taste (56.5% versus 9.1%, a 6.2-fold difference). Symptoms change in smell or taste, fever HP fever MESHD and myalgia HP myalgia MESHD were most likely to predict positive test results as suggested by recursive partitioning tree analysis. Among individuals without any of these three symptoms (74.2% of the sample), only 0.8% tested positive, compared to 18.3% of those with both fever HP fever MESHD and changes in smell or taste. Most subjects with antibodies SERO against SARS-CoV-2 in Brazil are symptomatic, even though most present only mild symptoms.

    Estimates of the rate of infection MESHD and asymptomatic TRANS COVID-19 disease in a population sample from SE England

    Authors: Philippa M Wells; Katie M Doores; Simon Couvreur; Rocio Martin Martinez; Jeffrey Seow; Carl Graham; Sam Acors; Neophytos Kouphou; Stuart Neil; Richard Tedder; Pedro Matos; Kate Poulton; Maria Jose Lista; Ruth Dickenson; Helin Sertkaya; Thomas Maguire; Edward Scourfield; Ruth Bowyer; Deborah Hart; Aoife O'Byrne; Kathryn Steele; Oliver Hemmings; Carolina Rosadas; Myra McClure; Joan Capedevila-Pujol; Jonathan wolf; Sebastien Ourseilin; Matthew Brown; Michael Malim; Timothy Spector; Claire Steves

    doi:10.1101/2020.07.29.20162701 Date: 2020-07-30 Source: medRxiv

    Background: Understanding of the true asymptomatic TRANS rate of infection of SARS-CoV-2 MESHD is currently limited, as is understanding of the population-based seroprevalence SERO after the first wave of COVID-19 within the UK. The majority of data thus far come from hospitalised patients, with little focus on general population cases, or their symptoms. Methods: We undertook enzyme linked immunosorbent assay SERO characterisation of IgM and IgG responses against SARS-CoV-2 spike glycoprotein and nucleocapsid protein of 431 unselected general-population participants of the TwinsUK cohort from South-East England, aged TRANS 19-86 (median age TRANS 48; 85% female TRANS). 382 participants completed prospective logging of 14 COVID-19 related symptoms via the COVID Symptom Study App, allowing consideration of serology alongside individual symptoms, and a predictive algorithm for estimated COVID-19 previously modelled on PCR positive individuals from a dataset of over 2 million. Findings: We demonstrated a seroprevalence SERO of 12% (51participants of 431). Of 48 seropositive individuals with full symptom data, nine (19%) were fully asymptomatic TRANS, and 16 (27%) were asymptomatic TRANS for core COVID-19 symptoms: fever HP fever MESHD, cough HP cough MESHD or anosmia HP anosmia MESHD. Specificity of anosmia HP anosmia MESHD for seropositivity was 95%, compared to 88% for fever HP fever MESHD cough HP and anosmia HP anosmia MESHD combined. 34 individuals in the cohort were predicted to be Covid-19 positive using the App algorithm, and of those, 18 (52%) were seropositive. Interpretation: Seroprevalence SERO amongst adults TRANS from London and South-East England was 12%, and 19% of seropositive individuals with prospective symptom logging were fully asymptomatic TRANS throughout the study. Anosmia HP demonstrated the highest symptom specificity for SARS-CoV-2 antibody SERO response. Funding: NIHR BRC, CDRF, ZOE global LTD, RST-UKRI/MRC

    Massive cerebral venous thrombosis HP cerebral venous thrombosis MESHD related to oligosymptomatic COVID-19 infection: a case report

    Authors: Simone Beretta; Fulvio Da Re; Valentina Francioni; Paolo Remida; Benedetta Storti; Lorenzo Fumagalli; Maria Luisa Piatti; Patrizia Santoro; Diletta Cereda; Claudia Cutellè; Fiammetta Pirro; Danilo Antonio Montisano; Francesca Beretta; Francesco Pasini; Annalisa Cavallero; Ildebrando Appollonio; Carlo Ferrarese

    doi:10.21203/rs.3.rs-49755/v1 Date: 2020-07-27 Source: ResearchSquare

    Background: The development of thrombotic coagulopathy MESHD is frequent in COVID-19 patients, but the timing after infection, cerebral venous system involvement MESHD, treatment and outcome are uncertain.Case Presentation: We report a case of massive cerebral venous thrombosis HP cerebral venous thrombosis MESHD occurring in the late phase of COVID-19 infection MESHD. Mild respiratory symptoms, without fever HP, started three weeks before headache HP headache MESHD and acute neurological deficits MESHD. She had no dyspnea HP dyspnea MESHD, although she was hypoxic MESHD and with typical COVID-19 associated interstitial pneumonia MESHD pneumonia HP. Brain CT scan showed a left parietal hypodense lesion with associated sulcal subarachnoid haemorrhage MESHD. CT angiography showed a massive cerebral vein thrombosis MESHD. An asymptomatic TRANS concomitant right internal iliac vein thrombosis MESHD was found. Both cerebral venous thrombosis HP cerebral venous thrombosis MESHD and deep venous thrombosis HP deep venous thrombosis MESHD were effectively treated with unfractionated heparin started on the day of admission, then shifted to low molecular weight heparin, with a favorable clinical course. Nasopharyngel swab, repeated twice, tested negative for SARS-CoV-2. Serological tests SERO confirmed SARS-CoV-2 infection MESHD. Conclusions: Our case supports active surveillance and prevention of thrombotic complications MESHD associated with COVID-19, which may affect both peripheral and cerebral venous system MESHD. Early initiation of unfractionated heparin may lead to good neurological outcome.

    EPICOVID19: Psychometric assessment and validation of a short diagnostic scale for a rapid Covid-19 screening based on reported symptoms

    Authors: Luca Bastiani; Loredana Fortunato; Stefania Pieroni; Fabrizio Bianchi; Fulvio Adorni; Federica Prinelli; Andrea Giacomelli; Gabriele Pagani; Stefania Maggi; Caterina Trevisan; Marianna Noale; Nithiya Jesuthasan; Aleksandra Sojic; Carla Pettenati; Massimo Andreoni; Raffaele Antonelli Incalzi; Massimo Galli; Sabrina Molinaro

    doi:10.1101/2020.07.22.20159590 Date: 2020-07-25 Source: medRxiv

    Background Confirmed COVID-19 cases have been reported in 213 countries and regions and as of 12 July 2020, over 12 million cases, with 561617 deaths have been reported worldwide. The number of cases changes quickly and varies depending upon which source you use to track, so in the current epidemiological context, the early recognition is critical for the rapid identification of suspected cases (with SARS-CoV-2 infection MESHD-like symptoms and signs) to be immediately subjected to quarantine measures. Although surveys are widely used for identifying COVID-19 cases, outcomes and associated risks, no validated epidemiological tool exists for surveying SARS-CoV-2 infection MESHD in the population so far. Methods Our study is the phase II of the EPICOVID19 national survey, launched in April 2020 including a national convenience sample of 201121 adults TRANS, who voluntarily filled the EPICOVID19 questionnaire. The phase II questionnaire was mailed to all subjects who underwent tests for COVID-19 by nasopharyngeal swab (NPS) and who accepted to be involved in the second phase of the study, focused on the results reported for NPS and/or serological IgG/IgM tests. We evaluated the capability of the self-reported symptoms collected through the EPICOVID19 questionnaire to discriminate the COVID-19 among symptomatic subjects, in order to identify possible cases to undergo instrumental measurements and clinical examinations. We defined a method for the identification of a total score and validated it with reference to the serological and molecular clinical diagnosis, using four standard steps: identification of critical factors, confirmation of presence of latent variable, development of optimal scoring algorithm and validation of the scoring algorithm. Findings 2703 subjects [66% response rate] completed the Phase II questionnaire. Of 2703 individuals, 694 (25.7%) were NPS MESHD(+) and of these 84 (12.1% of the 694 NPS(+)) were asymptomatic TRANS. In the individuals who performed serological testing SERO, of the 472 who did IgG(+) and 421 who did IgM(+), 22.9% and 11.6% tested positive, respectively. Among IgG(+) 1 of 108 subjects was asymptomatic TRANS (0.9%) while 5/49 subjects among IgM(+) were asymptomatic TRANS (10.2%). Compared with NPS(-), among NPS MESHD(+) subjects there was a higher rate for Fever HP Fever MESHD (421 [60.7%] vs 391[19.5% ]; p<0.0001), Loss of Taste and/or Smell (365 [52.6%] vs 239 [11.9% ]; p<0.0001) and Cough HP (352 [50.7%] vs 580 [28.9% ]; p<0.0001). Also for other symptoms the frequencies were significantly higher in NPS MESHD(+) subjects than in NPS(-) ones (p<0.001). Among groups with serological tests SERO, the symptoms with higher percentages in the subjects IgG(+) were Fever HP Fever MESHD (65 [60.2%] vs 43[11.8% ]; p<0.0001) and Pain HP Pain MESHD in muscles, bones, joints (73 [67.6%] vs 71 [19.5% ]; p<0.0001). For the COVID-19 self-reported symptoms items, exploratory (proportion variance explained [89.9%]) and confirmatory factor analysis results (SMSR 0.072; RMSEA 0.052) highlights the presence of one latent variable (factor) underlying the symptoms. We define the one-factor solution as EPICOVID19 diagnostic scale and optimal score for each items was identified: Respiratory problems (1.03), Chest pain HP Chest pain MESHD (1.07), Loss of Taste and/or Smell (0.97) and Tachycardia HP Tachycardia MESHD ( palpitations HP) (1.05) were the most important symptoms. The cut-off score was 2.56 ( Sensitivity SERO 76.56%; Specificity 68.24%) in NPS MESHD(+) and 2.59 (Se 80.37; Sp 80.17) in IgG(+) subjects.

    Unusual Presentation of Kawasaki Disease MESHD with Multisystem Inflammation MESHD and Antibodies SERO Against Severe Acute Respiratory Syndrome MESHD Coronavirus 2: A Case Report

    Authors: Haena Kim; Jung Yeon Shim; Jae-Hoon Ko; Aram Yang; Jae Won Shim; Deok Soo Kim; Hye Lim Jung; Ji Hee Kwak; In Suk Sol

    doi:10.21203/rs.3.rs-41276/v1 Date: 2020-07-12 Source: ResearchSquare

    Background: Since mid-April 2020, cases of multisystem inflammatory syndrome MESHD in children TRANS (MIS-C) associated with coronavirus disease MESHD (COVID-19) that mimic Kawasaki disease MESHD ( KD MESHD) have been reported in Europe and North America. However, no cases have been in East Asia, where KD MESHD is more prevalent.Case presentation: A previously healthy 11-year-old boy was admitted with a 4-day history of fever HP fever MESHD and abdominal pain HP abdominal pain MESHD. He had no contact history to any patient with COVID-19. Blood SERO acute inflammatory markers were highly elevated. He was treated with antibiotics for suspected bacterial enteritis MESHD, but he suddenly developed hypotension HP hypotension MESHD. Inotropics and intravenous immunoglobulin were administered to manage septic shock MESHD shock HP. On hospitalization day 6, he developed signs and symptoms of KD MESHD (conjunctival injection, strawberry tongue HP, cracked lip MESHD, and coronary artery dilatation MESHD dilatation HP) in addition to pleural/pericardial effusion MESHD pericardial effusion HP and mesenteric lymphadenitis HP lymphadenitis MESHD. The results of microbiologic tests, including reverse-transcription polymerase chain reaction for severe acute respiratory syndrome coronavirus 2 MESHD (SARS-CoV-2), were negative. Fluorescent immunoassay SERO and enzyme-linked immunosorbent assay SERO revealed abundant IgG antibodies SERO against SARS-CoV-2 in his serum SERO, but no IgM antibodies SERO. He was discharged successfully on day 13.Conclusion: MIS-C may occur in children TRANS with a previously asymptomatic TRANS COVID-19 infection MESHD. A high index of suspicion is required for this novel syndrome in unusual cases of KD MESHD or KD shock syndrome MESHD shock HP syndrome with multisystem inflammation MESHD, even when there is no clear history of contact or symptoms of COVID-19.

    SEROPREVALENCE SERO AND CLINICAL SPECTRUM OF SARS-CoV-2 INFECTION IN MESHD THE FIRST VERSUS THIRD TRIMESTER OF PREGNANCY

    Authors: Francesca Crovetto; Fatima Crispi; Elisa Llurba; Francesc Figueras; Maria Dolores Gomez-Roig; Eduard Gratacos

    doi:10.1101/2020.06.17.20134098 Date: 2020-06-19 Source: medRxiv

    Introduction: Case registries of pregnant women diagnosed with coronavirus disease MESHD (COVID-19) by polymerase chain reaction (PCR) have reported that the majority experienced mild infection MESHD, but up to 9% may require critical care. Most COVID-19 cases published were in the third trimester of pregnancy, which could reflect reporting bias, higher risk of infection TRANS risk of infection TRANS infection MESHD or increased disease severity in late pregnancy. Seroprevalence SERO studies may allow reliable estimates of the susceptibility to infection MESHD and clinical spectrum since they include asymptomatic TRANS and mild infections not tested for PCR. We evaluated the seroprevalence SERO and clinical presentation of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection MESHD in pregnant women in the first and third trimester. Methods: The study was approved by the Institutional Review Board at each institution and informed consent was obtained. We recruited 874 consecutive pregnancies attending for first trimester screening (10-16 weeks of gestation, n=372) or delivery (n=502) from April 14 to May 5. All women were interviewed with a structured questionnaire for COVID-19 symptoms two months prior to sampling. SARS-CoV-2 IgG and IgM/IgA antibodies were tested SERO (COVID-19 VIRCLIA Monotest, Vircell Microbiologist, Spain; reported sensitivity SERO 70% IgG and 89% IgM/IgA, and specificity 89% and 99% respectively). Indeterminate results were re-tested (VITROS Immunodiagnostic Products Anti-SARS-CoV2 Total Tests, Ortho Clinical Diagnostics, USA; 100% sensitivity SERO and specificity) and re-classified as positive or negative. Women with COVID-19 were diagnosed and managed according to standard protocols and guidelines3,4. Statistical differences were tested using the {chi}2 test or Student t-test as appropriate (p<0.05). Results: A total of 125 of 874 women (14.3%) were positive for either IgG or IgM/IgA SARS-CoV-2 antibodies SERO, 54/372 (14.5%) in the first and 71/502 (14.1%) in the third trimester. A total of 75/125 (60%) reported no symptoms of COVID-19 in the past 2 months, whereas 44 (35.2%) reported one or more symptoms, of which 31 (24.8%) had at least 3 symptoms or anosmia HP anosmia MESHD and 8 (6.4%) dyspnea HP dyspnea MESHD. Overall, 7 women (5.6%) were admitted for persistent fever HP fever MESHD despite paracetamol and dyspnea HP dyspnea MESHD, of which 3 had signs of pneumonia HP pneumonia MESHD on chest radiography. All 3 had criteria for severity (bilateral chest condensation, respiratory rate>30 and leukopenia HP leukopenia MESHD) and required oxygen support but not critical care or mechanical ventilation, and they were all discharged well. The rates of symptomatic infection MESHD, hospital admission or dyspnea HP dyspnea MESHD were significantly higher in third trimester women (Table and Figure). Discussion: The 14.3% seroprevalence SERO of SARS-COV-2 in pregnant women in this study was substantially larger than the contemporary rates of PCR positive cases (0.78%) reported for women 20-40y in Barcelona. The data confirm that COVID-19 is asymptomatic TRANS in the majority of pregnant women6 and illustrate the value of seroprevalence SERO studies to capture the high proportion of asymptomatic TRANS or mild infections MESHD. In this study, none of the 125 pregnant women with SARS-CoV-2 infection MESHD required critical care as compared to 9% reported in cases diagnosed with PCR. However, the proportion of infections MESHD with symptoms or dyspnea HP dyspnea MESHD was remarkably higher in the third trimester, and these results are in line with COVID-19 registries, reporting that 81% of hospitalized women were in late pregnancy or peripartum. These results provide reassuring information that, even in settings with a high prevalence SERO, SARS-CoV-2 infection MESHD in pregnancy mostly presents with asymptomatic TRANS or mild clinical forms. The susceptibility to infection seemed to be the same in the first and the third trimesters of gestation. The data further suggest that, as with other respiratory viruses, COVID-19 could be more severe and require increased surveillance in late pregnancy. These findings should be confirmed and extended with larger consecutive prevalence SERO studies in pregnancy.

    Seroprevalence SERO against COVID-19 and follow-up of suspected cases in primary TRANS health care in Spain

    Authors: Carlos Brotons; Jordi Serrano; Diana Fernandez; Carlos Garcia-Ramos; Begona Ichazo; Jeannine Lemaire; Patricia Montenegro; Irene Moral; Ricky Perez- Wienese; Marc Pitarch; Mireia Puig; Maria Teresa Vilella; Jaume Sellares

    doi:10.1101/2020.06.13.20130575 Date: 2020-06-16 Source: medRxiv

    Background During the coronavirus disease 2019 (COVID-19) pandemic little information has been available about patients with mild or moderate symptoms attended and followed in the primary care setting, most of whom had an unknown status for the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection MESHD. Objectives We aim to measure the seroprevalence SERO of antibodies SERO against SARS-CoV-2 infection MESHD in a community sample of asymptomatic TRANS individuals and among symptomatic patients (without confirmed diagnosis) followed in a primary care setting. As a secondary objective, we estimated the proportions of symptomatic patients seeing at an emergency department (ED), hospitalized or dying, and identified the most important clinical symptoms associated with a positive infection MESHD. Methods From April 21 to April 24 2020, we selected a random sample of 600 individuals stratified by age groups TRANS, from a total population of 19,899 individuals from a community area in Barcelona (study population 1). From April 29 to May 5 2020, we also invited all the patients that had been followed by general practitioners (GPs) (study population 2). We used for both populations COVID-19 Rapid lateral flow immunoassay SERO which qualitatively assesses the presence of patient-generated IgG and IgM in approximately 10-15 minutes. The prevalence SERO (95% confidence intervals [CI]) of infection MESHD (past and current) was defined as the proportion of individuals with antibody SERO seropositivity. Odds ratios (ORs) for a positive test result were estimated using logistic regression analysis. Results Three hundred and eleven asymptomatic TRANS individuals from the randomly selected sample accepted to participate in the study. The overall mean age TRANS was 43.7 years (SD 21.79, range 1-94) and 55% were women. Seventeen individuals were seropositive for IgM and/or IgG, resulting an overall prevalence SERO of 5,47% (95% CI, 3.44-8.58). Six-hundred and thirty-four symptomatic patients were followed by GPs. The overall mean age TRANS was 46.97 years (SD 20.05, range 0-92) and 57.73% were women. Of these, 244 patients (38.49%) were seropositive for IgM and/or IgG. During the follow-up period, 27.13% of symptomatic patients attended the ED, 11.83% were hospitalized and about 2% died. Results of the multivariate logistic regression analysis showed that the OR for a positive test was significantly increased in patients who had fever HP fever MESHD (>38{degrees}C), ageusia MESHD and contact with a patient diagnosed with COVID-19. Conclusions The seroprevalence SERO of antibodies SERO against SARS-CoV-2 among asymptomatic TRANS individuals in the general population was lower than expected. Approximately 40% of the symptomatic patients followed by GPs during the peak months of the pandemic in Barcelona, were positive. Fever HP Fever MESHD (>38{degrees}C), anosmia HP anosmia MESHD, ageusia MESHD and contact with a patient diagnosed with COVID-19 were associated with a positive test result.

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MeSH Disease
Human Phenotype
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Seroprevalence


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