Publications by authors named "Ola Blennow"

Background: pneumonia (PJP) is a life-threatening disease. In the intensive care unit (ICU), PJP is most frequently observed among patients with several conditions not related to the human immunodeficiency virus (HIV) infection.

Methods: The primary objective of the present post-hoc analysis of a multicenter, multinational, retrospective study was to assess factors impacting prognosis in ICU patients with PJP through univariable and multivariable analyses.

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The SARS-CoV-2 virus poses a significant risk to immunocompromised patients, who display weakened immunity and reduced seroconversion following infection and vaccination. In this study, we recruited 19 hospitalized patients with immune disorders (ImCo) and 4 immunocompetent controls (ICC) with COVID-19. We evaluated their serological, humoral, and cellular immune responses at <30 days and >90 days post-symptom onset.

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At the 10th European Conference on Infections in Leukaemia (ECIL), the guidelines for antifungal prophylaxis in pediatric and adult patients with hematological malignancies (HM) were updated and some changes introduced. Regarding acute myeloid leukemia (AML) and myelodysplastic syndromes (MDS) patients undergoing remission induction chemotherapy, a B-II grading has been assigned to isavuconazole, micafungin, and caspofungin, based on non-randomized studies that have shown efficacy in preventing invasive fungal diseases (IFD). Regarding high-risk MDS patients treated with azacytidine, prophylaxis with posaconazole during the first four cycles of treatment is supported in the literature.

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Background: Pneumonia is a well-known complication in patients with severe alcohol withdrawal syndrome (SAWS). Antibiotic prophylaxis in ICU treated SAWS patients may be beneficial but data is lacking. The aims of this study were to investigate the effect of introduction of trimethoprim-sulfamethoxazole (TMP-SMX) prophylaxis, on use of broad-spectrum antibiotics and ICU length of stay (LOS) in SAWS patients with refractory delirium tremens (rDT).

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Article Synopsis
  • Immunocompromised patients have shown weak responses to initial SARS-CoV-2 mRNA vaccinations, prompting recommendations for extra booster doses; however, real-world data on these recommendations is limited.
  • A two-year follow-up of the COVAXID clinical trial involved 364 participants, focusing on their immune responses and the effects of their vaccination schedule and underlying health conditions.
  • The study found that while some patients who initially had poor responses improved after additional doses, their immune response remained affected by their immunosuppressive status, emphasizing the need for ongoing vaccination efforts in these populations.
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  • The COVID-19 pandemic has severely affected individuals with hematological malignancies due to their weakened immune systems, resulting in higher mortality rates and severe outcomes.
  • Data from the EPICOVIDEHA registry, which compiles COVID-19 cases from these patients worldwide, was collected from 2020 to 2022, including 8,767 cases from 152 centers across 41 countries.
  • Findings show a significant drop in critical infections and overall mortality rates, but hospitalization (especially in ICU) remains a serious risk factor; vaccination is linked to better survival outcomes, highlighting the need for ongoing monitoring and support for these patients.
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T cells are critical in mediating the early control of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) breakthrough infection. However, it remains unknown whether memory T cells can effectively cross-recognize new SARS-CoV-2 variants with a broad array of mutations, such as the emergent hypermutated BA.2.

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Background: Anakinra and tocilizumab are used for severe Covid-19, but only one previous randomized controlled trial (RCT) has studied both. We performed a multi-center RCT comparing anakinra or tocilizumab versus usual care (UC) for adults at high risk of deterioration.

Methods: The study was conducted June 2020 to March 2021.

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Although mRNA SARS-CoV-2 vaccines are generally safe and effective, in certain immunocompromised individuals they can elicit poor immunogenic responses. Among these individuals, people living with HIV (PLWH) have poor immunogenicity to several oral and parenteral vaccines. As the gut microbiome is known to affect vaccine immunogenicity, we investigated whether baseline gut microbiota predicts immune responses to the BNT162b2 mRNA SARS-CoV-2 vaccine in healthy controls and PLWH after two doses of BNT162b2.

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Patients affected by multiple myeloma (MM) have an increased risk of severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) infection and subsequent coronavirus (20)19 disease (COVID-19)-related death. The changing epidemiological and therapeutic scenarios suggest that there has been an improvement in severity and survival of COVID-19 during the different waves of the pandemic in the general population, but this has not been investigated yet in MM patients. Here we analyzed a large cohort of 1221 patients with MM and confirmed SARS-CoV-2 infection observed between February 2020, and August 2022, in the EPICOVIDEHA registry from 132 centers around the world.

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Since the beginning of the COVID-19 pandemic, there has been an overall improvement in patient mortality. However, haematological malignancy patients continue to experience significant impacts from COVID-19, including high rates of hospitalization, intensive care unit (ICU) admissions, and mortality. In comparison to other haematological malignancy patients, individuals with chronic myeloid leukemia (CML) generally have better prognosis.

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Background: The purpose of this study was to prospectively investigate the incidence of influenza-associated pulmonary aspergillosis (IAPA) in influenza patients admitted to intensive care units in Sweden.

Methods: The study included consecutive adult patients with PCR-verified influenza A or B in 12 Swedish intensive care units (ICUs) over four influenza seasons (2019-2023). Patients were screened using serum galactomannan and β-d-glucan tests and fungal culture of a respiratory sample at inclusion and weekly during the ICU stay.

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Objectives: Elderly patients with hematologic malignancies face the highest risk of severe COVID-19 outcomes. The infection's impact on different age groups remains unstudied in detail.

Methods: We analyzed elderly patients (age groups: 65-70, 71-75, 76-80, and >80 years old) with hematologic malignancies included in the EPICOVIDEHA registry between January 2020 and July 2022.

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Background: Pneumocystis jirovecii pneumonia (PJP) is an opportunistic, life-threatening disease commonly affecting immunocompromised patients. The distribution of predisposing diseases or conditions in critically ill patients admitted to intensive care unit (ICU) and subjected to diagnostic work-up for PJP has seldom been explored.

Materials And Methods: The primary objective of the study was to describe the characteristics of ICU patients subjected to diagnostic workup for PJP.

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Introduction: Molnupiravir and nirmatrelvir/ritonavir are antivirals used to prevent progression to severe SARS-CoV-2 infections and decrease hospitalisation and mortality rates. Nirmatrelvir/ritonavir was authorised in Europe in December 2021, whereas molnupiravir is not yet licensed in Europe as of February 2022. Molnupiravir may be an alternative to nirmatrelvir/ritonavir because it is associated with fewer drug-drug interactions and contraindications.

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Background: Immunocompromised patients have varying responses to SARS-CoV-2 mRNA vaccination. However, there is limited information available from prospective clinical trial cohorts with respect to long-term immunogenicity-related responses in these patient groups following three or four vaccine doses, and in applicable cases infection.

Methods: In a real-world setting, we assessed the long-term immunogenicity-related responses in patients with primary and secondary immunodeficiencies from the prospective open-label clinical trial COVAXID.

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Suboptimal immunity to SARS-CoV-2 mRNA vaccination has frequently been observed in individuals with various immunodeficiencies. Given the increased antibody evasion properties of emerging SARS-CoV-2 subvariants, it is necessary to assess whether other components of adaptive immunity generate resilient and protective responses against infection. We assessed T cell responses in 279 individuals, covering five different immunodeficiencies and healthy controls, before and after booster mRNA vaccination, as well as after Omicron infection in a subset of patients.

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Article Synopsis
  • The ECMM conducted a study across 20 European countries to analyze the outcomes of patients with culture-proven candidaemia, focusing on how well hospitals followed treatment guidelines.
  • A total of 632 patients were included, revealing a high 90-day mortality rate of 43%, with factors such as age, ICU admission, comorbidity score, and specific types of Candida predicting mortality.
  • Adherence to clinical management guidelines, measured by EQUAL Candida scores, was associated with better survival outcomes, reinforcing the importance of following established treatment protocols.
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  • - Patients who had CD19-directed CAR T-cell therapy remain highly susceptible to viral infections, especially with COVID-19, which showed a 31% overall mortality rate in the study population.
  • - Those infected with the Omicron variant had a significantly lower mortality risk (7%) compared to earlier variants (58%).
  • - Vaccination and monoclonal antibody treatment were found to improve outcomes, with a marked reduction in mortality (from 32% to 0%) for those treated with monoclonal antibodies, indicating better survival rates for CAR T-cell recipients over time.
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Background: Nirmatrelvir/ritonavir treatment decreases the hospitalisation rate in immunocompetent patients with COVID-19, but data on efficacy in patients with haematological malignancy are scarce. Here, we describe the outcome of nirmatrelvir/ritonavir treatment in a large cohort of the latter patients.

Methods: This is a retrospective cohort study from the multicentre EPICOVIDEHA registry (NCT04733729) on patients with haematological malignancy, who were diagnosed with COVID-19 between January and September 2022.

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Background: Extracorporeal photopheresis (ECP) is frequently used to treat moderate-severe chronic graft versus host disease (cGVHD), however limited data exists describing ECP treatment effects on healthcare and societal costs. We aimed to characterize clinical and health economic outcomes and productivity loss in cGVHD patients exposed to ECP.

Methods: We identified 2708 patients aged ≥ 18 years with a record of allogeneic hematopoietic stem cell transplantation (HSCT) in the Swedish Patient Register between 2006 and 2020.

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