Your browser doesn't support javascript.
Show: 20 | 50 | 100
Results 1 - 4 de 4
Frontiers in allergy ; 3, 2022.
Article in English | EuropePMC | ID: covidwho-1989666


Introduction Neutrophil and eosinophil activation and its relation to disease severity has been understudied in primary care patients with COVID-19. In this study, we investigated whether the neutrophil and eosinophil compartment were affected in primary care patients with COVID-19. Methods COVID-19 patients, aged ≥ 40 years with cardiovascular comorbidity presenting to the general practitioner with substantial symptoms, partaking in the COVIDSat@Home study between January and April 2021, were included. Blood was drawn during and 3 to 6 months after active COVID-19 disease and analyzed by automated flow cytometry, before and after stimulation with a formyl-peptide (fNLF). Mature neutrophil and eosinophil markers at both time points were compared to healthy controls. A questionnaire was conducted on disease symptoms during and 3 to 6 months after COVID-19 disease. Results The blood of 18 COVID-19 patients and 34 healthy controls was analyzed. During active COVID-19 disease, neutrophils showed reduced CD10 (p = 0.0360), increased CD11b (p = 0.0002) and decreased CD62L expression (p < 0.0001) compared to healthy controls. During active COVID-19 disease, fNLF stimulated neutrophils showed decreased CD10 levels (p < 0.0001). Three to six months after COVID-19 disease, unstimulated neutrophils showed lowered CD62L expression (p = 0.0003) and stimulated neutrophils had decreased CD10 expression (p = 0.0483) compared to healthy controls. Both (un)stimulated CD10 levels increased 3 to 6 months after active disease (p = 0.0120 and p < 0.0001, respectively) compared to during active disease. Eosinophil blood counts were reduced during active COVID-19 disease and increased 3 to 6 months after infection (p < 0.0001). During active COVID-19, eosinophils showed increased unstimulated CD11b (p = 0.0139) and decreased (un)stimulated CD62L expression (p = 0.0036 and p = 0.0156, respectively) compared to healthy controls. Three to six months after COVID-19 disease, (un)stimulated eosinophil CD62L expression was decreased (p = 0.0148 and p = 0.0063, respectively) and the percentage of CD11bbright cells was increased (p = 0.0083 and p = 0.0307, respectively) compared to healthy controls. Conclusion Automated flow cytometry analysis reveals specific mature neutrophil and eosinophil activation patterns in primary care patients with COVID-19 disease, during and 3 to 6 months after active disease. This suggests that the neutrophil and eosinophil compartment are long-term affected by COVID-19 in primary care patients. This indicates that these compartments may be involved in the pathogenesis of long COVID.

EuropePMC; 2022.
Preprint in English | EuropePMC | ID: ppcovidwho-338371


Objectives To determine differences in health-related quality of life (HRQoL) and presence and duration of symptoms between adults with and without established SARS-CoV-2 moderately severe lower respiratory tract infection (LRTI) in the 12 months following their primary care visit. Design Prospective cohort study Setting 35 general practices in the provinces Noord-Brabant and Utrecht, the Netherlands. Participants Individuals aged ≥18 years who presented to their general practitioner (GP) with a moderately severe LRTI during the first COVID-19 waive in The Netherlands (March-June 2021) underwent serology testing (participants, GPs and study personnel remained blinded for serology outcomes during study conduct) and completed baseline and follow-up questionnaires. Of the 315 participants who gave consent, 277 (88%) were suitable for inclusion in the analyses. Complete follow-up date was available in 97% of participants. Main outcome measures 1) Scores of SF-36;physical component summary (PCS), mental component summary (MCS) and subscales. 2) Risk of any and individual persisting symptoms (of cough, dyspnea, chest pain, fatigue, brain fog, headache, and anosmia/ageusia) over time. Results The change in SF-36 PSC (p=0.13), MCS (p=0.30), as well as subscale scores, over time did not differ between SARS-CoV-2 serology positive and negative participants after adjusting for sex, age, BMI, diabetes and chronic pulmonary conditions. The risk of any persisting symptom over time did not significantly differ between the groups (aHR 0.61, 95% CI 0.33-1.15), nor did the risk of individual symptoms. Conclusions In the 12 months following their moderately severe LRTI, primary care patients with and without confirmed SARS-CoV-2 infection had a comparable HRQoL profile. Albeit a considerable proportion of patients reported persistent symptoms, there was no evidence of a difference in the course of symptoms over time between patients with and without confirmed SARS-CoV-2 infection. Trial registration Dutch Trial Register (NTR) number NL8729

Nederlands Tijdschrift voor Geneeskunde ; 164(15), 2020.
Article in Dutch | GIM | ID: covidwho-1717205


It is a great challenge for general practitioners to adequately triage patients with respiratory complaints and to prevent contamination of others - patients and care providers - when assessing these patients. Here we discuss 3 patients from the Amersfoort region;then we will discuss diagnostics and policy in general practice in patients with respiratory complaints during this epidemic of the SARS-CoV-2 virus.