Background In COVID-19 patients the progressive clinical deterioration seems secondary to the activation of a cytokine storm. Ferritin is considered a direct mediator of the immune system and some evidences suggested a shared physio-pathogenic basis between COVID-19 and ‘Hyperferritinemic Syndromes.’ The aim of our study was to evaluate the prognostic role of ferritin in COVID-19 patients. Methods We retrospectively studied consecutive COVID-19 patients admitted to four Italian Internal Medicine Units. Role of potential prognostic markers was evaluated with binary logistic regression analysis and results were expressed as odds ratios (ORs) with the corresponding 95% confidence intervals (CIs). Poor outcome was defined as death or need to transfer in the intensive care unit. Results Two hundred patients were included (mean age 68.75 ± 13.22 years). Ferritin value was highly elevated (>3000 ng/mL) in 8% of our population; 13% of patients were transferred to intensive care units and 12% of patients died. At multivariate analysis, highly elevated ferritin levels (OR 16.67 C.I. 4.89–57.57 p < 0.001) and hemoglobin < 10 g/dL (OR 8.88 C.I. 2.02–39.09 p = 0.004) were independently associated with a bad outcome. Patients with ferritin values > 3000 ng/ml appeared to have an inflammatory activation with elevated values of CRP and D-dimer and low values of lymphocyte count. Conclusion Our results confirm the prognostic role of ferritin in hospitalized COVID-19 patients. Patients with high ferritin levels should be considered critically ill and treated in an adequate setting. Furthermore, COVID-19 seems to share some characteristics with hyperferritinemic syndromes with potential therapeutic implications.

No abstract

Background : The diagnosis of Covid 19 is made by the detection of viral RNA by PCR on nasopharyngeal swabs. In some patients the test is falsely negative, while other biological samples are positive. The aim of the study is to identify characteristics and prognostic factors for swab negativity in COVID-19 patients with BA-confirmed disease. Materials and methods : Multicentric retrospective case-control study of patients admitted for COVID-19 between March and November 2020 in two internal medicine units of the AOU Careggi and in the Internal Medicine of the Hospital of Varese. Were enrolled patients aged ≥18 years hospitalized for COVID-19 with viral RNA isolation on biological specimen, considering as cases the patients negative to swab but positive to BA. For each case, four controls with positive swab at admission were enrolled Results : the study included 95 patients, 19 cases and 76 controls. The mean time between symptoms onset and swab was 2.65±1.9 days in cases, with a statistically significant (p= 0.003) difference compared to controls (5.53±3.0 days). Patients with negative swab had a longer mean length of stay and more frequent adverse outcome than controls. Conclusions : Swabbing within a short time of symptoms onset is a predictor for false negative. Patients with repeated negative swabs have a worse clinical picture with longer hospital stay, greater need for non-invasive ventilation and higher frequency of adverse outcome.

No abstract