Katarina Widgren

ORCID: 0000-0002-5713-0071
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About
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Research Areas
  • Herpesvirus Infections and Treatments
  • Influenza Virus Research Studies
  • Respiratory viral infections research
  • HIV/AIDS Research and Interventions
  • HIV, Drug Use, Sexual Risk
  • Animal Virus Infections Studies
  • HIV Research and Treatment
  • Hepatitis B Virus Studies
  • COVID-19 epidemiological studies
  • Hepatitis C virus research
  • Viral gastroenteritis research and epidemiology
  • Amoebic Infections and Treatments
  • Bacillus and Francisella bacterial research
  • Poxvirus research and outbreaks
  • Streptococcal Infections and Treatments
  • Virology and Viral Diseases
  • Antimicrobial Resistance in Staphylococcus
  • Reproductive tract infections research
  • Rabies epidemiology and control
  • Congenital Anomalies and Fetal Surgery
  • Parasitic Infections and Diagnostics
  • Animal Disease Management and Epidemiology
  • Veterinary Medicine and Surgery
  • Vector-borne infectious diseases
  • Viral Infections and Immunology Research

Stockholm South General Hospital
2022

Umeå University
2014-2022

Karolinska Institutet
2014-2022

Public Health Agency of Sweden
2014-2022

Stockholm County Council
2022

Karolinska University Hospital
2020-2022

Östersunds Hospital
2014

Mid Sweden University
2014

Swedish Institute
2013

Statens Serum Institut
2009-2011

In November 2010, ≈27,000 (≈45%) inhabitants of Östersund, Sweden, were affected by a waterborne outbreak cryptosporidiosis. The was characterized rapid onset and high attack rate, especially among young middle-aged persons. Young age, number infected family members, amount water consumed daily, gluten intolerance identified as risk factors for acquiring Also, chronic intestinal disease age significantly associated with prolonged diarrhea. Identification Cryptosporidium hominis subtype...

10.3201/eid2004.121415 article EN cc-by Emerging infectious diseases 2014-02-26

A previously healthy male patient had detectable monkeypox virus DNA in saliva 76 days after laboratory confirmation of infection. comprehensive characterization viral kinetics and a detailed follow-up indicated declining risk for transmission during the weeks symptoms appeared.

10.3201/eid2810.221107 article EN cc-by Emerging infectious diseases 2022-09-01

Within I-MOVE (European programme to monitor seasonal and pandemic influenza vaccine effectiveness (IVE)) five countries conducted IVE pilot case-control studies in 2008-9. One hundred sixty sentinel general practitioners (GP) swabbed all elderly consulting for influenza-like illness (ILI). Influenza confirmed cases were compared negative controls. We a pooled analysis obtain summary the age group of >or=65 years. measured each study assessed heterogeneity between qualitatively using I2...

10.2807/ese.14.44.19388-en article EN cc-by Eurosurveillance 2009-11-05

Background and aims: Sharing of unsterile injection equipment contributes to transmission hepatitis C virus (HCV), HIV B (HBV) among people who inject drugs (PWID) but is largely preventable through needle exchange programmes (NEP). Sweden has been one the last countries in Europe scale up access NEP for PWID, consequently have high prevalence rates HCV HIV. The aim study was investigate demographic drug-related determinants risk behaviours, sharing needle/syringe paraphernalia, patterns...

10.1080/23744235.2020.1727002 article EN cc-by-nc-nd Infectious Diseases 2020-02-19

The incidence of invasive group A streptococcal infections in Sweden was 6.1 per 100,000 population 2012, the highest since disease became notifiable 2004. Furthermore, January and February 2013 marked a dramatic increase cases notified, partly explainable by an emm1/T1 isolates, type previously shown to cause severe more often than other types. Healthcare providers health authorities neighbouring countries have been informed about this increase.

10.2807/1560-7917.es2013.18.14.20443 article EN cc-by Eurosurveillance 2013-04-04

Chickenpox vaccine is not included in the routine childhood vaccination programme Sweden. The aim of this study was to estimate baseline national chickenpox disease burden, as comprehensive studies, required for an assessment regarding introduction, are lacking.We used available health care registers and databases; death register, hospitalisations communicable notifications database, Stockholm County on consultations specialist primary care, temporary parental benefit a sick child, searches...

10.1186/s12879-016-1957-5 article EN cc-by BMC Infectious Diseases 2016-11-10

Background: Early diagnosis of HIV is important for the prognosis individual patients, because antiretroviral treatment can be started at appropriate time, and public health, transmission prevented. Methods: Data were collected from 767 patients who diagnosed in Sweden during 2003–2010 infected or born abroad. A recent infection testing algorithm (RITA) was applied to BED-EIA test results (OD-n < 0.8), CD4 counts (≥ 200 cells/μl), clinical information. classification used as indicator early...

10.3109/00365548.2014.953575 article EN Scandinavian Journal of Infectious Diseases 2014-10-07

Background To follow the impact of 2009 influenza pandemic in Denmark, surveillance was extended with a system monitoring potentially influenza-associated hospitalisations. Methodology/Principal Findings National administrative data from 2004–2010 automatic reporting all hospital visits and admissions Denmark (population 5.5 million) were used. In-patient hospitalisations linked to ICD-10 codes for conditions (influenza, viral bacterial pneumonia, respiratory distress, febrile convulsion)...

10.1371/journal.pone.0013939 article EN cc-by PLoS ONE 2010-11-11

Comprehensive cost-effectiveness analyses of introducing varicella and/or herpes zoster vaccination in the Swedish national programme.Cost-effectiveness based on epidemiological results from a specifically developed transmission model.National programme Sweden, over an 85- or 20-year time horizon depending strategy.Hypothetical cohorts people aged 12 months and 65-years at baseline.Four alternative strategies; 1, not to vaccinate; 2, with one dose live attenuated vaccine age second 18...

10.1371/journal.pone.0251644 article EN cc-by PLoS ONE 2021-05-13

Objectives: To describe the current panorama of severe chickenpox disease and seroprevalence in Sweden, as a basis for approaching decision on universal vaccination.Methods: Patients discharged with an International Classificationof Diseases 10th revision-code (B01-B01.9) eight pediatric infectious diseases departments Stockholm Gothenburg 2012-2014 were included study their medical charts reviewed. Further, residual serum samples collected from 11 laboratories across Sweden analyzed...

10.1016/j.ijid.2021.08.012 article EN cc-by International Journal of Infectious Diseases 2021-08-09

For decades, assessments of the impact universal varicella vaccination on epidemiology and herpes zoster (HZ) have been made using mathematical modelling. Decreased virus circulation resulting diminished exogenous boosting predicted to lead a surge in HZ incidence. Lately, hypothesis has challenged due lack an extensive incidence countries with, by now long-standing vaccination.In deterministic compartmental transmission model disease, we various levels duration protection from explore...

10.1016/j.vaccine.2021.11.063 article EN cc-by Vaccine 2021-12-18

Abstract Aim This study explored the differences in demographic and socio‐economic factors between children hospitalised due to four common viral infections. Methods Demographic data were obtained from Statistics Sweden on &gt;3000 admitted Astrid Lindgren Children's Hospital 2009–2014 with rotavirus, influenza, respiratory syncytial virus (RSV) or chickenpox. We compared case groups using logistic regression rotavirus cases as reference. Results There median age at admission; RSV younger...

10.1111/apa.15842 article EN Acta Paediatrica 2021-03-14
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