Hagen Frickmann

ORCID: 0000-0002-8967-9528
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About
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Research Areas
  • Parasitic Infections and Diagnostics
  • Antibiotic Resistance in Bacteria
  • Bacterial Identification and Susceptibility Testing
  • Viral gastroenteritis research and epidemiology
  • Salmonella and Campylobacter epidemiology
  • Antimicrobial Resistance in Staphylococcus
  • Parasites and Host Interactions
  • Antifungal resistance and susceptibility
  • Amoebic Infections and Treatments
  • Bacterial biofilms and quorum sensing
  • Travel-related health issues
  • Burkholderia infections and melioidosis
  • Fungal Infections and Studies
  • Malaria Research and Control
  • Vector-borne infectious diseases
  • Vibrio bacteria research studies
  • Mosquito-borne diseases and control
  • Mycobacterium research and diagnosis
  • Infective Endocarditis Diagnosis and Management
  • HIV/AIDS Research and Interventions
  • Chronic Obstructive Pulmonary Disease (COPD) Research
  • Enterobacteriaceae and Cronobacter Research
  • SARS-CoV-2 and COVID-19 Research
  • Viral Infections and Vectors
  • Hepatitis Viruses Studies and Epidemiology

Bundeswehrkrankenhaus
2014-2025

University of Rostock
2009-2025

Institute of Medical Microbiology and Hygiene
2012-2024

Bernhard Nocht Institute for Tropical Medicine
2013-2022

Universitätsmedizin Rostock
2009-2021

GTx (United States)
2019

Armed Forces Hospital
2013

Friedrich-Loeffler-Institut
2013

RWTH Aachen University
2013

Universitätsklinikum Aachen
2013

Background The two major indications for tonsillectomy are recurrent tonsillitis (RT) and peritonsillar abscess (PTA). Unlike PTAs, which primarily treated surgically, RT is often cured by only after a series of failed drug therapy attempts. Although the bacteriological background has been studied, reason lack success conservative therapeutic approaches not well understood. Methods In prospective study, tonsil specimens from 130 patients 124 PTA were examined presence extra- intracellular...

10.1371/journal.pone.0009452 article EN cc-by PLoS ONE 2010-03-01

Background: Molecular methods, in particular PCR, are increasingly used for the diagnosis of enteric pathogens stool samples. In high-endemicity settings, however, asymptomatic carriage or residual DNA from previous infections will hamper interpretation positive test results. We assessed quantitative dimension this problem schoolchildren rural highlands Madagascar. Methods: Stool samples were collected 410 apparently healthy Madagascan and analysed by multiplex real-time PCR enteroinvasive...

10.3109/23744235.2015.1022212 article EN Infectious Diseases 2015-03-12

Due to the beginning of vaccination against COVID-19, serological discrimination between vaccine-associated humoral response and serology-based surveillance natural SARS-CoV-2 infections as well breakthrough becomes an issue relevance. Here, we assessed differentiated effects application RNA vaccine using spike protein epitopes on results both anti-spike protein–based serology (EUROIMMUN) anti-nucleocapsid-based (VIROTECH). A total 80 serum samples from vaccinees acquired at different time...

10.3390/diagnostics11030426 article EN cc-by Diagnostics 2021-03-03

Abstract Pathogenic strains of Escherichia coli can cause gastrointestinal infections, urinary tract infections (UTIs), bacteremia, and other severe infections. Some isolates this species are capable producing extended-spectrum β-lactamase (ESBL) enzymes, which mediate resistance against penicillin derivates cephalosporins. Fungi the Ascomycota phylum known to produce antibiotics from different classes with activity various bacterial agents. Among them, genera Penicillium, Cephalosporium,...

10.1590/s2175-97902025e23497 article EN cc-by Brazilian Journal of Pharmaceutical Sciences 2025-01-01

Information on the molecular epidemiology and carbapenem resistance mechanisms in Gram-negative bacterial isolates Moldova is scarce. To close this knowledge gap, carbapenem-resistant bacteria were collected over an 11-month period a routine diagnostic laboratory Moldova. Antimicrobial susceptibility was phenotypically genotypically assessed. Phylogenetic relationships investigated multi-locus sequence types provided. The assessment indicated several clusters of phylogenetically closely...

10.3390/microorganisms13020421 article EN cc-by Microorganisms 2025-02-14

Cystoisospora belli is a coccidian parasite commonly associated with enteric infections in immunocompromised individuals. The study was conducted to assess epidemiological, clinical, and immunological features of Ghanaian people living HIV (human immunodeficiency virus) without antiretroviral therapy molecular proof C. belli-specific nucleic acid sequences their stool samples. While detected 4.2% (n = 25) the assessed HIV-positive patients, this case for only 1 (1.2%) control individuum...

10.3390/pathogens14030212 article EN cc-by Pathogens 2025-02-21

Swab-based nasal screening is commonly used to identify asymptomatic carriage of Staphylococcus aureus in patients. Bacterial detection depends on the uptake and release capacities swabs swabbing technique itself. This study investigates performance different swab-types MRSA-screening by utilizing a unique artificial nose model provide realistic standardized conditions.An anatomically correct was inoculated with numerically defined mixture MRSA epidermidis bacteria at quantities 4×10(2)...

10.1371/journal.pone.0111627 article EN cc-by PLoS ONE 2014-10-29

Anthrax is an infectious disease of relevance for military forces. Although spores Bacillus anthracis obiquitously occur in soil, reports on soil-borne transmission to humans are scarce. In this narrative review, the potential anthrax discussed based pathogen-specific characteristics and course several centuries warfare. theory, foci can pose a risk infection animals if sufficient amounts virulent present soil even after extended period time. praxis, however, transmissions usually due...

10.1556/1886.2020.00008 article EN European Journal of Microbiology and Immunology 2020-06-01

At the Bundeswehr Hospitals of Hamburg and Westerstede, patients repatriated from subtropical war crisis zones Northern Africa Middle East were medically treated, including microbiological assessment. Within a six-year interval, 16 Acinetobacter spp. strains, 14 baumannii (Ab) isolates with resistance against carbapenems origins in Afghanistan (n = 4), Iraq 2), Libya Syria 8) collected. While clonal relationships Libyan Syrian strains had been assessed by superficial next generation...

10.3390/antibiotics10030291 article EN cc-by Antibiotics 2021-03-11

We evaluated a one-tube multiplex real-time PCR targeting DNA of Schistosoma haematobium complex and S. mansoni in serum samples obtained at different German diagnostic centers.Simplex protocols for the detection multi-copy DNA-repeats Dra1 Sm1-7 were combined to new format. The was subjected full validation including evaluation real-life setting with travelers migrants. results compared those stool urine microscopy, serology, circulating cathodic antigen (CCA) rapid tests urine. Sensitivity...

10.1016/j.tmaid.2021.102035 article EN cc-by-nc-nd Travel Medicine and Infectious Disease 2021-03-26

Due to considerable differences in pathogenicity, Haemophilus influenzae, H. parainfluenzae and haemolyticus have be reliably discriminated routine diagnostics. Retrospective analyses suggest frequent misidentifications of commensal as influenzae. In a multi-center approach, we assessed the suitability fluorescence situ hybridization (FISH) matrix-assisted laser-desorption-ionization time-of-flight mass-spectrometry (MALDI-TOF-MS) for identification species level.A strain collection 84 spp....

10.1371/journal.pone.0063222 article EN cc-by PLoS ONE 2013-04-30

Introduction. Since 2013, European soldiers have been deployed on the Union Training Mission (EUTM) in Mali. From beginning, diarrhea has among most "urgent" concerns. Diarrhea surveillance based deployable real-time PCR equipment was conducted between December 2013 and August 2014. Material Methods. In total, 53 stool samples were obtained from 51 with acute diarrhea. Multiplex panels comprised enteroinvasive bacteria, diarrhea-associated Escherichia coli (EPEC, ETEC, EAEC, EIEC),...

10.1155/2015/573904 article EN BioMed Research International 2015-01-01

Methicillin-resistant Staphylococcus aureus (MRSA) clones pose a significant threat to hospitalised patients because the bacteria can be transmitted by asymptomatic carriers within healthcare facilities. To date, nothing is known about prevalence of S. and MRSA among workers in Madagascar. The objective our study was examine clonal epidemiology nasal non-medical University students Antananarivo, This cross sectional screened swabs taken from for aureus. Multiplex PCR performed identify...

10.1186/s12879-016-1733-6 article EN cc-by BMC Infectious Diseases 2016-08-15

Non-typhoidal Salmonella (NTS) cause the majority of bloodstream infections in Ghana, however mode transmission and source invasive NTS Africa are poorly understood. This study compares from water sources rural Ghana. Blood hospitalised, febrile children samples drinking were analysed for spp. Strains serotyped to trace possible epidemiological links between human water-derived isolates.. Antibiotic susceptibility testing was performed, In 2720 blood culture samples, 165 (6%) isolated. S....

10.1186/s12879-018-2957-4 article EN cc-by BMC Infectious Diseases 2018-01-19
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