Jan-Erik Berdal

• Bouziotis, Jason; Arvanitakis, Marianna; Preiser, Jean-Charles; Abbas, Ali; Abdukahil, Sheryl Ann & Abdulkadir, Nurul Najmee [Show all 40 contributors for this article] (2022). Association of body mass index with COVID-19 related in-hospital death. Clinical Nutrition. ISSN 0261-5614. doi: 10.1016/j.clnu.2022.01.017. Full text in Research Archive
• Søvik, Signe; Barrat-Due, Andreas; Kåsine, Trine; Olasveengen, Theresa M.; Strand, Marianne Wigernes & Tveita, Anders Aune [Show all 16 contributors for this article] (2022). Corticosteroids and superinfections in COVID-19 patients on invasive mechanical ventilation. Journal of Infection. ISSN 0163-4453. 85(1), p. 57–63. doi: 10.1016/j.jinf.2022.05.015.
• Omland, Torbjørn; Prebensen, Christian Haugland; Jonassen, Christine M; Svensson, My Hanna Sofia; Berdal, Jan-Erik & Seljeflot, Ingebjørg [Show all 7 contributors for this article] (2021). Soluble ST2 concentrations associate with in-hospital mortality and need for mechanical ventilation in unselected patients with COVID-19. Open heart. ISSN 2053-3624. 8(2), p. 1–7. doi: 10.1136/openhrt-2021-001884. Full text in Research Archive
• Myhre, Peder Langeland; Heck, Siri Lagethon; Skranes, Julia Brox; Prebensen, Christian Haugland; Jonassen, Christine M & Berge, Trygve [Show all 15 contributors for this article] (2021). Cardiac pathology 6 months after hospitalization for COVID-19 and association with the acute disease severity. American Heart Journal. ISSN 0002-8703. 242, p. 61–70. doi: 10.1016/j.ahj.2021.08.001. Full text in Research Archive
• Morland, Mona; Haagensen, Rolf E; Dahl, Fredrik A.; Husby, Haldor & Berdal, Jan-Erik (2021). Langtidsprognose for pasienter innlagt i en medisinsk overvåkningsavdeling. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 141(9), p. 1–9. doi: 10.4045/tidsskr.20.0961. Full text in Research Archive
• Handal, Nina; Whitworth, Jimmy; Blomfeldt, Anita; Espvik, Heidi Johanne; Lysaker, Elisabeth & Berdal, Jan Erik [Show all 7 contributors for this article] (2021). Comparison of SARS-CoV-2 infections in healthcare workers with high and low exposures to Covid-19 patients in a Norwegian University Hospital. Infectious Diseases. ISSN 2374-4235. 53(6), p. 420–429. doi: 10.1080/23744235.2021.1885734.
• Myhre, Peder L.; Prebensen, Christian; Jonassen, Christine Monceyron; Berdal, Jan Erik & Omland, Torbjørn (2021). Sars-cov-2 viremia is associated with inflammatory, but not cardiovascular biomarkers, in patients hospitalized for covid-19. Journal of the American Heart Association (JAHA). ISSN 2047-9980. 10(9), p. 1–5. doi: 10.1161/JAHA.120.019756. Full text in Research Archive
• Prebensen, Christian; Myhre, Peder Langeland; Jonassen, Christine M; Rangberg, Anbjørg; Blomfeldt, Anita & Svensson, My Hanna Sofia [Show all 8 contributors for this article] (2020). Severe Acute Respiratory Syndrome Coronavirus 2 RNA in Plasma Is Associated with Intensive Care Unit Admission and Mortality in Patients Hospitalized with Coronavirus Disease 2019. Clinical Infectious Diseases. ISSN 1058-4838. 73(3). doi: 10.1093/cid/ciaa1338.
• Myhre, Peder Langeland; Prebensen, Christian; Strand, Heidi; Røysland, Ragnhild; Jonassen, Christine M. & Rangberg, Anbjørg [Show all 12 contributors for this article] (2020). Growth Differentiation Factor-15 Provides Prognostic Information Superior to Established Cardiovascular and Inflammatory Biomarkers in Unselected Patients Hospitalized with COVID-19. Circulation. ISSN 0009-7322. doi: 10.1161/CIRCULATIONAHA.120.050360.
• Søvik, Signe; Bådstøløkken, Per Martin; Sørensen, Vibecke; Myhre, Peder Langeland; Prebensen, Christian & Omland, Torbjørn [Show all 7 contributors for this article] (2020). A single‐centre, prospective cohort study of COVID‐19 patients admitted to ICU for mechanical ventilatory support. Acta Anaesthesiologica Scandinavica. ISSN 0001-5172. doi: 10.1111/aas.13726. Full text in Research Archive
• Lyngbakken, Magnus; Berdal, Jan Erik; Eskesen, Arne N; Kvale, Dag; Olsen, Inge Christoffer & Rueegg, Corina Silvia [Show all 11 contributors for this article] (2020). A pragmatic randomized controlled trial reports lack of efficacy of hydroxychloroquine on coronavirus disease 2019 viral kinetics. Nature Communications. ISSN 2041-1723. 11:5284, p. 1–6. doi: 10.1038/s41467-020-19056-6. Full text in Research Archive
• Omland, Torbjørn; Prebensen, Christian; Røysland, Ragnhild; Søvik, Signe; Sørensen, Vibecke & Røsjø, Helge [Show all 9 contributors for this article] (2020). Established Cardiovascular Biomarkers Provide Limited Prognostic Information in Unselected Patients Hospitalized with COVID-19. Circulation. ISSN 0009-7322. 19, p. 1878–1880. doi: 10.1161/CIRCULATIONAHA.120.050089.
• Berdal, Jan Erik; Follin-Arbelet, Benoit & Bjørnholt, Jørgen Vildershøj (2019). Experiences from multiplex PCR diagnostics of faeces in hospitalised patients: Clinical significance of Enteropathogenic Escherichia coli (EPEC) and culture negative campylobacter. BMC Infectious Diseases. ISSN 1471-2334. 19(1). doi: 10.1186/s12879-019-4271-1. Full text in Research Archive
• Hesstvedt, Liv; Gaustad, Peter; Müller, Fredrik; Andersen, Cecilie Torp; Brunborg, Cathrine & Mylvaganam, Haima [Show all 19 contributors for this article] (2019). The impact of age on risk assessment, therapeutic practice and outcome in candidemia. Infectious Diseases. ISSN 2374-4235. 51(6), p. 425–434. doi: 10.1080/23744235.2019.1595709.
• Albotins, Craig A.; Berdal, Jan Erik; Cascas, Fransisco; Corona, Pablo S.; Cuellar, Daniel & Ferrari, Matteo Carlo [Show all 15 contributors for this article] (2018). Hip and Knee Section, Prevention, Antimicrobials (Systemic): Proceedings of International Consensus on Orthopedic Infections. Journal of Arthroplasty. ISSN 0883-5403. 34(2), p. S279–S288. doi: 10.1016/j.arth.2018.09.012.
• Morland, Mona; Haagensen, Rolf E; Dahl, Fredrik Andreas & Berdal, Jan Erik (2018). Epidemiologi og prognoser i en medisinsk overvåkningsavdeling. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 138(8), p. 734–739. doi: 10.4045/tidsskr.17.0496.
• Mohn, Kristin Greve Isdahl; Cox, Rebecca Jane; Tunheim, Gro; Berdal, Jan Erik; Hauge, Anna G & Jul-Larsen, Åsne [Show all 10 contributors for this article] (2015). Immune responses in acute and convalescent patients with mild, moderate and severe disease during the 2009 influenza pandemic in Norway. PLOS ONE. ISSN 1932-6203. 10:e0143281(11). doi: 10.1371/journal.pone.0143281. Full text in Research Archive Show summary

  Increased understanding of immune responses influencing clinical severity during pandemic influenza infection is important for improved treatment and vaccine development. In this study we recruited 46 adult patients during the 2009 influenza pandemic and characterized humoral and cellular immune responses. Those included were either acute hospitalized or convalescent patients with different disease severities (mild, moderate or severe). In general, protective antibody responses increased with enhanced disease severity. In the acute patients, we found higher levels of TNF-α single-producing CD4+T-cells in the severely ill as compared to patients with moderate disease. Stimulation of peripheral blood mononuclear cells (PBMC) from a subset of acute patients with peptide T-cell epitopes showed significantly lower frequencies of influenza specific CD8+ compared with CD4+ IFN-γ T-cells in acute patients. Both T-cell subsets were predominantly directed against the envelope antigens (HA and NA). However, in the convalescent patients we found high levels of both CD4+ and CD8+ T-cells directed against conserved core antigens (NP, PA, PB, and M). The results indicate that the antigen targets recognized by the T-cell subsets may vary according to the phase of infection. The apparent low levels of cross-reactive CD8+ T-cells cells recognizing internal antigens in acute hospitalized patients suggest an important role for this T-cell subset in protective immunity against influenza. I

• Berdal, Jan Erik; Haagensen, Rolf E; Ranheim, Trond Egil & Bjørnholt, Jørgen (2014). Nosocomial candidemia; risk factors and prognosis revisited; 11 years experience from a Norwegian secondary hospital. PLOS ONE. ISSN 1932-6203. 9(7). doi: 10.1371/journal.pone.0103916. Full text in Research Archive
• Berdal, Jan Erik; Mollnes, Tom Eirik; Wæhre, Torgun; Olstad, Ole Kristoffer; Halvorsen, Bente & Ueland, Thor [Show all 12 contributors for this article] (2011). Excessive innate immune response and mutant D222G/N in severe A (H1N1) pandemic influenza. Journal of Infection. ISSN 0163-4453. 63(4), p. 308–316. doi: 10.1016/j.jinf.2011.07.004.
• Berdal, Jan Erik; Stavem, Knut; Omland, Torbjørn; Hall, Christian & Smith, Erichsen Nils (2008). Prognostic merit of N-terminal-proBNP and N-terminal-proANP in mechanically ventilated critically ill patients. Acta Anaesthesiologica Scandinavica. ISSN 0001-5172. 52, p. 1265–1272. doi: 10.111/j.1399-6576.2008.01737.x.
• Berdal, Jan Erik; Bjørnholt, Jørgen; Blomfeldt, Anita; Smith, Erichsen Nils & Bukholm, Geir (2007). Patterns and dynamics of airway colonisation in mechanically-ventilated patients. Clinical Microbiology and Infection (CMI). ISSN 1198-743X. 13. doi: 10.1111/j.1469-0691.2006.01678.x.
• Berdal, Jan Erik; Smith, Erichsen Nils; Bjørnholt, Jørgen; Blomfeldt, Anita & Bukholm, Geir (2006). Does Pseudomonas aeruginosa colonization influence morbidity and mortality in the intensive care unit patient? Experience from an outbreak caused by contaminated oral swabs. Acta Anaesthesiologica Scandinavica. ISSN 0001-5172. 50, p. 1095–1102.
• Berdal, Jan Erik; Skråmm, Inge; Mowinckel, P.; Gulbrandsen, Pål & Bjørnholt, Jørgen (2005). Use of rifampicin and ciprofloxacin combination therapy after surgical debridement in the treatment of early manifestation prosthetic joint infections. Clinical Microbiology and Infection (CMI). ISSN 1198-743X. 11, p. 843–845.
• Simonsen, GS; Berdal, Jan Erik; Sundsfjord, A & Berild, D (2004). Simplified and not exact about antibiotics. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 124(18).
• Berdal, Jan Erik & Steinbakk, Martin (2003). Long-term antibiotic suppressive therapy for an infected thoracic aorta graft. Tidsskrift for Den norske legeforening. ISSN 0029-2001. p. 2260–2262.

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• Berdal, Jan Erik (2020). Management of Extracranial infections. In Sundstrøm, Terje; Grände, Per-Olof; Luoto, Teemu; Rosenlund, Christina; Undén, Johan & Wester, Knut Gustav (Ed.), Management of Severe Traumatic Brain Injury Evidence, Tricks, and Pitfalls. Springer. ISSN 978-3-030-39383-0. p. 485–491. doi: https%3A/doi.org/10.1007/978-3-030-39383-0.
• Lyngbakken, Magnus; Berdal, Jan Erik; Eskesen, Arne N; Kvale, Dag; Inge Christoffer, Olsen & Rangberg, Anbjørg [Show all 10 contributors for this article] (2020). Norwegian Coronavirus Disease 2019 (NO COVID-19) Pragmatic Open label Study to assess early use of hydroxychloroquine sulphate in moderately severe hospitalised patients with coronavirus disease 2019: A structured summary of a study protocol for a randomised controlled trial. Trials. ISSN 1745-6215. 21. doi: 10.1186/s13063-020-04420-0.
• Berdal, Jan Erik (2017). Infeksjonmedisin. Klinisk undersøkelse og utredning, Indremedisin I & II. Forlag Vett & Viten. ISSN 9788241207402. p. 15–23.
• Simonsen, Gunnar Skov; Berdal, Jan-Erik; Grave, Kari; Juvet, Lene Kristine; Lunestad, Bjørn Tore & Riisberg, Ingvild [Show all 9 contributors for this article] (2021). Antibiotikaresistens - Kunnskapshull, utfordringer og aktuelle tiltak. Status 2020. . Folkehelseinstituttet, Område for Smittevern, miljø og helse. ISSN 978-82-8406-153-5. Full text in Research Archive
• Berdal, Jan Erik; Bukholm, Geir; Jonassen, Christine M & Müller, Fredrik (2012). Airway colonization pathogenesis and prognosis in mechanically ventilated patients. Unipub forlag. ISSN 978-82-8264-356-6. 2012(1323).

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