John Karlsson Valik

Publikationer
CV
Populärvetenskap och samverkan

Artiklar

Article: EUROPEAN JOURNAL OF CLINICAL MICROBIOLOGY & INFECTIOUS DISEASES. 2026;45(4):1133-1140
Diagnostic value of RT-PCR for detection of tick-borne encephalitis virus RNA in cerebrospinal fluid
Glans H; Bartholdsson S; Lagerqvist N; Nord H; Blennow O; Moren J; Westman G; Valik JK; Klingstrom J; Gredmark-Russ S
Article: COMMUNICATIONS MEDICINE. 2026;6(1):104
A matched case-control study on Escherichia coli factors contributing to sepsis and septic shock in bacteraemic patients
Maldonado N; Lopez-Hernandez I; Valik JK; Lopez-Cortes LE; Martinez Perez-Crespo PM; Garcia-Montaner A; Alcalde-Rico M; Sousa-Dominguez A; Jover Saenz A; Goikoetxea J; Pulido-Navazo A; Buzon-Martin L; Aller AI; Boix-Palop L; Del Arco-Jimenez A; Smithson-Amat A; Sanchez Calvo JM; Natera- Kindelan C; Reguera Iglesias JM; Arminanzas-Castillo C; Galan-Sanchez F; Bahamonde A; Gea-Lazaro I; Castello-Abietar C; Perez-Camacho I; Marrodan-Ciordia T; Becerril-Carral B; Naucler P; Pascual-Hernandez A; Rodriguez-Bano J; Lopez Hernandez I; Lopez-Cortes LE; Retamar-Gentil P; Pascual A; Lanz Garcia J; Aller Garcia AI; Leon Jimenez E; Corzo Delgado J; Perez Rodriguez MT; Barcenilla Gaite F; Goikoetxea Aguirre AJ; Montejo Baranda M; Pulido Navazo A; Cuquet Pedragosa J; Labayru Echeverria C; Mantecon Vallejo MA; Boix Palop L; Calbo Sebastian E; Del Arco Jimenez A; Smithson Amat A; Natera Kindelan C; Reguera Iglesias JM; Arminanzas Castillo C; Farinas Alvarez MDC; Galan Sanchez F; Bahamonde Carrasco A; Gea Lazaro I; Fernandez Suarez J; Perez Camacho I; Marrodan Ciordia T; Arias Temprano M; Becerril Carral B; Canueto Quintero J; Reyes Bertos A; Sanchez Porto A; Vinuesa Garcia D; Guzman Garcia M; Jimenez Aguilar P; Pasquau J
Article: CLINICAL MICROBIOLOGY AND INFECTION. 2026;32(1):147-153
The effect of remdesivir and nirmatrelvir/ritonavir on mortality in patients hospitalized with COVID-19 during the Omicron era: an emulated target trial
Valik JK; Hedberg P; Nowak P; Blennow O; Dyrdak R; Vesterbacka J; Zetterqvist J; Naucler P
Article: BMJ OPEN. 2025;15(6):e098344
Determinants of post COVID-19 clinic attendance among SARS-CoV-2-infected individuals in Stockholm, Sweden: a population-based cohort study
Hedberg P; Geijerstam PA; Valik JK; Almgren-Lidman C; Ternhag A; Naucler P
Article: COMMUNICATIONS MEDICINE. 2024;4(1):264
Genomic virulence markers are associated with severe outcomes in patients with Pseudomonas aeruginosa bloodstream infection
Valik JK; Giske CG; Hasan B; Gozalo-Marguello M; Martinez-Martinez L; Premru MM; Martincic Z; Beovic B; Maraki S; Zacharioudaki M; Kofteridis D; Mccarthy K; Paterson D; Cueto MD; Morales I; Leibovici L; Babich T; Granath F; Rodriguez-Bano J; Oliver A; Yahav D; Naucler P
Article: CLINICAL INFECTIOUS DISEASES. 2024;78(4):900-907
Outcomes of SARS-CoV-2 Omicron Variant Infections Compared With Seasonal Influenza and Respiratory Syncytial Virus Infections in Adults Attending the Emergency Department: A Multicenter Cohort Study
Hedberg P; Valik JK; Abdel-Halim L; Alfven T; Naucler P
Article: INFECTION. 2023;51(4):1003-1012
Outcomes of octogenarians and nonactogenarians with Pseudomonas aeruginosa bacteremia: a multicenter retrospective study
Atamna A; Margalit I; Ayada G; Babich T; Naucler P; Valik JK; Giske CG; Benito N; Cardona R; Rivera A; Pulcini C; Fattah MA; Haquin J; Macgowan A; Chazan B; Yanovskay A; Ben Ami R; Landes M; Nesher L; Zaidman-Shimshovitz A; McCarthy K; Paterson DL; Tacconelli E; Buhl M; Mauer S; Rodriguez-Bano J; de Cueto M; Oliver A; Ruiz de Gopegui E; Cano A; Machuca I; Gozalo-Marguello M; Martinez-Martinez L; Gonzalez-Barbera EM; Gomez Alfaro I; Salavert M; Beovic B; Saje A; Mueller-Premru M; Pagani L; Vitrat V; Kofteridis D; Zacharioudaki M; Maraki S; Weissman Y; Paul M; Dickstei Y; Yahav D
Article: SCIENTIFIC REPORTS. 2023;13(1):11760
Predicting sepsis onset using a machine learned causal probabilistic network algorithm based on electronic health records data
Valik JK; Ward L; Tanushi H; Johansson AF; Farnert A; Mogensen ML; Pickering BW; Herasevich V; Dalianis H; Henriksson A; Naucler P
Article: CLINICAL INFECTIOUS DISEASES. 2023;76(3):469-478
Association Between Time to Appropriate Antimicrobial Treatment and 30-day Mortality in Patients With Bloodstream Infections: A Retrospective Cohort Study
Van Heuverswyn J; Valik JK; van der Werff SD; Hedberg P; Giske C; Naucler P
Article: INFECTIOUS DISEASES AND THERAPY. 2022;11(4):1505-1519
Duration of Treatment for Pseudomonas aeruginosa Bacteremia: a Retrospective Study
Babich T; Naucler P; Valik JK; Giske CG; Benito N; Cardona R; Rivera A; Pulcini C; Fattah MA; Haquin J; Macgowan A; Grier S; Chazan B; Yanovskay A; Ben Ami R; Landes M; Nesher L; Zaidman-Shimshovitz A; McCarthy K; Paterson DL; Tacconelli E; Buhl M; Mauer S; Rodriguez-Bano J; de Cueto M; Oliver A; de Gopegui ER; Cano A; Machuca I; Gozalo-Marguello M; Martinez-Martinez L; Gonzalez-Barbera EM; Alfaro IG; Salavert M; Beovic B; Saje A; Mueller-Premru M; Pagani L; Vitrat V; Kofteridis D; Zacharioudaki M; Maraki S; Weissman Y; Paul M; Dickstein Y; Leibovici L; Yahav D
Article: BMJ QUALITY & SAFETY. 2022;31(5):379-382
Impact of the COVID-19 pandemic on the incidence and mortality of hospital-onset bloodstream infection: a cohort study
Valik JK; Hedberg P; Holmberg F; van der Werff SD; Naucler P
Article: CRITICAL CARE MEDICINE. 2022;50(3):e272-e283
Peripheral Oxygen Saturation Facilitates Assessment of Respiratory Dysfunction in the Sequential Organ Failure Assessment Score With Implications for the Sepsis-3 Criteria
Valik JK; Mellhammar L; Sunden-Cullberg J; Ward L; Unge C; Dalianis H; Henriksson A; Stralin K; Linder A; Naucler P
Article: THORAX. 2022;77(2):154-163
Clinical phenotypes and outcomes of SARS-CoV-2, influenza, RSV and seven other respiratory viruses: a retrospective study using complete hospital data
Hedberg P; Karlsson Valik J; van der Werff S; Tanushi H; Requena Mendez A; Granath F; Bell M; Martensson J; Dyrdak R; Hertting O; Farnert A; Ternhag A; Naucler P
Article: JOURNAL OF ANTIMICROBIAL CHEMOTHERAPY. 2021;76(8):2172-2181
Combination versus monotherapy as definitive treatment for Pseudomonas aeruginosa bacteraemia: a multicentre retrospective observational cohort study
Babich T; Naucler P; Valik JK; Giske CG; Benito N; Cardona R; Rivera A; Pulcini C; Fattah MA; Haquin J; MacGowan A; Grier S; Gibbs J; Chazan B; Yanovskay A; Ben Ami R; Landes M; Nesher L; Zaidman-Shimshovitz A; McCarthy K; Paterson DL; Tacconelli E; Buhl M; Mauer S; Rodriguez-Bano J; Morales I; Oliver A; Ruiz de Gopegui E; Cano A; Machuca I; Gozalo-Marguello M; Martinez Martinez L; Gonzalez-Barbera EM; Gomez Alfaro I; Salavert M; Beovic B; Saje A; Mueller-Premru M; Pagani L; Vitrat V; Kofteridis D; Zacharioudaki M; Maraki S; Weissman Y; Paul M; Dickstein Y; Leibovici L; Yahav D
Article: CLINICAL MICROBIOLOGY AND INFECTION. 2021;27 Suppl 1:S29-S39
Information technology aspects of large-scale implementation of automated surveillance of healthcare-associated infections.
Behnke M; Valik JK; Gubbels S; Teixeira D; Kristensen B; Abbas M; van Rooden SM; Gastmeier P; van Mourik MSM; PRAISE network
Article: CLINICAL MICROBIOLOGY AND INFECTION. 2021;27:S3-S19
PRAISE: providing a roadmap for automated infection surveillance in Europe
van Mourik MSM; van Rooden SM; Abbas M; Aspevall O; Astagneau P; Bonten MJM; Carrara E; Gomila-Grange A; de Greeff SC; Gubbels S; Harrison W; Humphreys H; Johansson A; Koek MBG; Kristensen B; Lepape A; Lucet J-C; Mookerjee S; Naucler P; Palacios-Baena ZR; Presterl E; Pujol M; Reilly J; Roberts C; Tacconelli E; Teixeira D; Tangden T; Valik JK; Behnke M; Gastmeier P
Article: JOURNAL OF HOSPITAL INFECTION. 2021;110:139-147
The accuracy of fully automated algorithms for surveillance of healthcare-associated urinary tract infections in hospitalized patients
van der Werff SD; Thiman E; Tanushi H; Valik JK; Henriksson A; Ul Alam M; Dalianis H; Ternhag A; Naucler P
Article: CLINICAL INFECTIOUS DISEASES. 2020;70(11):2270-2280
Ceftazidime, Carbapenems, or Piperacillin-tazobactam as Single Definitive Therapy for Pseudomonas aeruginosa Bloodstream Infection: A Multisite Retrospective Study
Babich T; Naucler P; Karlsson Valik J; Giske CG; Benito N; Cardona R; Rivera A; Pulcini C; Fattah MA; Haquin J; Macgowan A; Grier S; Gibbs J; Chazan B; Yanovskay A; Ben Ami R; Landes M; Nesher L; Zaidman-Shimshovitz A; McCarthy K; Paterson DL; Tacconelli E; Buhl M; Mauer S; Rodriguez-Bano J; Morales I; Oliver A; De Gopegui ER; Cano A; Machuca I; Gozalo-Marguello M; Martinez Martinez L; Gonzalez-Barbera EM; Gomez Alfaro I; Salavert M; Beovic B; Saje A; Mueller-Premru M; Pagani L; Vitrat V; Kofteridis D; Zacharioudaki M; Maraki S; Weissman Y; Paul M; Dickstein Y; Leibovici L; Yahav D
Article: INTERNATIONAL JOURNAL OF ANTIMICROBIAL AGENTS. 2020;55(2):105847
Risk factors for mortality among patients with Pseudomonas aeruginosa bacteraemia: a retrospective multicentre study
Babich T; Naucler P; Valik JK; Giske CG; Benito N; Cardona R; Rivera A; Pulcini C; Fattah MA; Haquin J; MacGowan A; Grier S; Chazan B; Yanovskay A; Ben Ami R; Landes M; Nesher L; Zaidman-Shimshovitz A; McCarthy K; Paterson DL; Tacconelli E; Buhl M; Maurer S; Rodriguez-Bano J; Morales I; Oliver A; Ruiz de Gopegui E; Cano A; Machuca I; Gozalo-Marguello M; Martinez-Martinez L; Gonzalez-Barbera EM; Gomez Alfaro I; Salavert M; Beovic B; Saje A; Mueller-Premru M; Pagani L; Vitrat V; Kofteridis D; Zacharioudaki M; Maraki S; Weissman Y; Paul M; Dickstein Y; Leibovici L; Yahav D
Article: INTERNATIONAL JOURNAL OF ANTIMICROBIAL AGENTS. 2019;53(6):820-829
Prediction of bloodstream infection caused by extended-spectrum β-lactamase-producing Enterobacterales in patients with suspected community-onset sepsis
Froding I; Valik JK; Bolinder L; Naucler P; Giske CG
Article: APMIS. 2018;126(12):892-898
Early depletion of contact system in patients with sepsis: a prospective matched control observational study
Berkestedt I; Andersson P; Herwald H; Valik JK; Sorensen O; Bodelsson M
Article: EUROPEAN JOURNAL OF CLINICAL MICROBIOLOGY & INFECTIOUS DISEASES. 2018;37(9):1735-1744
Vitamin D supplementation to persistent carriers of MRSA-a randomized and placebo-controlled clinical trial
Bjorkhem-Bergman L; Missailidis C; Karlsson-Valik J; Tammelin A; Ekstrom L; Bottai M; Hammar U; Lindh G; Bergman P
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Alla övriga publikationer

Letter: CLINICAL INFECTIOUS DISEASES. 2024;79(1):277-278
Reducing Diagnostic Bias Through Multiplex Polymerase Chain Reaction (PCR) Testing for SARS-CoV-2, Influenza A/B, and RSV
Hedberg P; Valik JK; Halim LA; Alfven T; Naucler P
Letter: JAMA PEDIATRICS. 2024;178(2):197
Outcomes of Pediatric SARS-CoV-2 Omicron Infection vs Influenza and Respiratory Syncytial Virus Infections
Hedberg P; Abdel-Halim L; Valik JK; Alfven T; Naucler P
Letter: JAMA INTERNAL MEDICINE. 2023;183(10):1178
Immortal Time Bias Possibly Affecting Fludrocortisone-Hydrocortisone Findings
Valik JK; Ternhag A; Naucler P
Doctoral thesis: 2022
Improved diagnosis and management of sepsis and bloodstream infection
Karlsson Valik J
Review: BMJ QUALITY & SAFETY. 2020;29(9):735-745
Validation of automated sepsis surveillance based on the Sepsis-3 clinical criteria against physician record review in a general hospital population: observational study using electronic health records data
Valik JK; Ward L; Tanushi H; Mullersdorf K; Ternhag A; Aufwerber E; Farnert A; Johansson AF; Mogensen ML; Pickering B; Dalianis H; Henriksson A; Herasevich V; Naucler P

Anställningar

Anknuten till Forskning, Institutionen för mikrobiologi, tumör- och cellbiologi, Karolinska Institutet, 2025-2027

Examina och utbildning

Medicine Doktorsexamen, Institutionen för medicin, Solna, Karolinska Institutet, 2022

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