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  1. Article ; Online: Correction to: The Unyvero Hospital-Acquired pneumonia panel for diagnosis of secondary bacterial pneumonia in COVID-19 patients.

    Tellapragada, Chaitanya / Giske, Christian G

    European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology

    2021  Volume 40, Issue 12, Page(s) 2487–2488

    Language English
    Publishing date 2021-09-19
    Publishing country Germany
    Document type Published Erratum
    ZDB-ID 603155-9
    ISSN 1435-4373 ; 0934-9723 ; 0722-2211
    ISSN (online) 1435-4373
    ISSN 0934-9723 ; 0722-2211
    DOI 10.1007/s10096-021-04331-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The Unyvero Hospital-Acquired pneumonia panel for diagnosis of secondary bacterial pneumonia in COVID-19 patients.

    Tellapragada, Chaitanya / Giske, Christian G

    European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology

    2021  Volume 40, Issue 12, Page(s) 2479–2485

    Abstract: The study was undertaken to evaluate the performance of Unyvero Hospitalized Pneumonia (HPN) panel application, a multiplex PCR-based method for the detection of bacterial pathogens from lower respiratory tract (LRT) samples, obtained from COVID-19 ... ...

    Abstract The study was undertaken to evaluate the performance of Unyvero Hospitalized Pneumonia (HPN) panel application, a multiplex PCR-based method for the detection of bacterial pathogens from lower respiratory tract (LRT) samples, obtained from COVID-19 patients with suspected secondary hospital-acquired pneumonia. Residual LRT samples obtained from critically ill COVID-19 patients with predetermined microbiological culture results were tested using the Unyvero HPN Application. Performance evaluation of the HPN Application was carried out using the standard-of-care (SoC) microbiological culture findings as the reference method. Eighty-three LRT samples were used in the evaluation. The HPN Application had a full concordance with SoC findings in 59/83 (71%) samples. The new method detected additional bacterial species in 21 (25%) and failed at detecting a bacterial species present in lower respiratory culture in 3 (3.6%) samples. Overall the sensitivity, specificity, positive, and negative predictive values of the HPN Application were 95.1% (95%CI 96.5-98.3%), 98.3% (95% CI 97.5-98.9%), 71.6% (95% CI 61.0-80.3%), and 99.8% (95% CI 99.3-99.9%), respectively. In conclusion, the HPN Application demonstrated higher diagnostic yield in comparison with the culture and generated results within 5 h.
    MeSH term(s) Adult ; Aged ; Bacteria/classification ; Bacteria/genetics ; Bacteria/isolation & purification ; COVID-19/complications ; COVID-19/virology ; Cross Infection/etiology ; Cross Infection/microbiology ; Female ; Hospitals ; Humans ; Lung/microbiology ; Male ; Middle Aged ; Multiplex Polymerase Chain Reaction/methods ; Pneumonia, Bacterial/diagnosis ; Pneumonia, Bacterial/etiology ; Pneumonia, Bacterial/microbiology ; SARS-CoV-2/genetics ; SARS-CoV-2/physiology ; Sweden
    Language English
    Publishing date 2021-03-04
    Publishing country Germany
    Document type Evaluation Study ; Journal Article
    ZDB-ID 603155-9
    ISSN 1435-4373 ; 0934-9723 ; 0722-2211
    ISSN (online) 1435-4373
    ISSN 0934-9723 ; 0722-2211
    DOI 10.1007/s10096-021-04194-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Recurrent bacteremia with Enterococcus faecalis, the clinical findings predicting endocarditis, and genomic characterization of the isolates: a retrospective cohort study.

    Tellapragada, Chaitanya / Östlund, Helena / Giske, Christian / Rasmussen, Magnus / Berge, Andreas

    European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology

    2023  Volume 42, Issue 8, Page(s) 1001–1009

    Abstract: Multiple episodes of Enterococcus faecalis bacteremia (EfsB) may indicate a relapse and be due to an undiagnosed infective endocarditis (IE). The aims were to study the clinical presentation of patients with EfsB with focus on the risk of recurrent ... ...

    Abstract Multiple episodes of Enterococcus faecalis bacteremia (EfsB) may indicate a relapse and be due to an undiagnosed infective endocarditis (IE). The aims were to study the clinical presentation of patients with EfsB with focus on the risk of recurrent infection and IE, identify potential improvements of the management, and to investigate whether E. faecalis isolates from different episodes in the same patient were identical. In a retrospective study, a cohort of patients with monomicrobial (M) EfsB episodes was analyzed. Clinical data from medical records were collected. Furthermore, blood culture isolates from patients with multiple episodes were subjected to whole genome sequencing and multilocus sequence typing. In 666 episodes of MEfsB, 69 patients with IE and 43 with recurrent infections were found. Patients without IE, but with a following episode diagnosed as IE, were compared to those without a following episode. Variables significantly correlated with IE were long duration of symptoms, growth in all blood cultures, unknown origin of infection, heart murmur, and predisposition for IE. Transesophageal echocardiography, all negative, was done in 4 out of 11 episodes during the first episodes, later diagnosed with IE. In 28 of 31 patients with two or more EfsB episodes, isolates with identical sequence type were found. Episodes of EfsB in patients later diagnosed with IE showed features of IE already during the first episodes, were not adequately evaluated, are due to identical isolates, and most likely represent true relapses. Risk factor analysis should guide the use of echocardiography.
    MeSH term(s) Humans ; Enterococcus faecalis/genetics ; Retrospective Studies ; Gram-Positive Bacterial Infections/epidemiology ; Gram-Positive Bacterial Infections/microbiology ; Endocarditis/diagnosis ; Endocarditis, Bacterial/diagnosis ; Endocarditis, Bacterial/epidemiology ; Endocarditis, Bacterial/microbiology ; Bacteremia/epidemiology ; Bacteremia/microbiology ; Genomics
    Language English
    Publishing date 2023-07-08
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 603155-9
    ISSN 1435-4373 ; 0934-9723 ; 0722-2211
    ISSN (online) 1435-4373
    ISSN 0934-9723 ; 0722-2211
    DOI 10.1007/s10096-023-04636-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Repurposing of antiviral drugs for COVID-19 and impact of repurposed drugs on the nervous system.

    Punekar, Madhura / Kshirsagar, Manas / Tellapragada, Chaitanya / Patil, Kanchankumar

    Microbial pathogenesis

    2022  Volume 168, Page(s) 105608

    Abstract: The recent pandemic, Coronavirus Disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has devastated humanity and is continuing to threaten us. Due to the high transmissibility of this pathogen, researchers are ... ...

    Abstract The recent pandemic, Coronavirus Disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has devastated humanity and is continuing to threaten us. Due to the high transmissibility of this pathogen, researchers are still trying to cope with the treatment and prevention of this disease. Few of them were successful in finding cure for COVID-19 by including repurposed drugs in the treatment. In such pandemic situations, when it is nearly impossible to design and implement a new drug target, previously designed antiviral drugs could help against novel viruses, referred to as drug repurposing/redirecting/repositioning or re-profiling. This review describes the current landscape of the repurposing of antiviral drugs for COVID-19 and the impact of these drugs on our nervous system. In some cases, specific antiviral therapy has been notably associated with neurological toxicity, characterized by peripheral neuropathy, neurocognitive and neuropsychiatric effects within the central nervous system (CNS).
    MeSH term(s) Antiviral Agents/pharmacology ; Antiviral Agents/therapeutic use ; Drug Repositioning ; Humans ; Nervous System ; SARS-CoV-2 ; COVID-19 Drug Treatment
    Chemical Substances Antiviral Agents
    Language English
    Publishing date 2022-05-30
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 632772-2
    ISSN 1096-1208 ; 0882-4010
    ISSN (online) 1096-1208
    ISSN 0882-4010
    DOI 10.1016/j.micpath.2022.105608
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Evaluation of a pneumonia multiplex PCR panel for detection of bacterial respiratory tract pathogens from serial specimens collected from hospitalized COVID-19 patients.

    Tellapragada, Chaitanya / Ydsten, Karin Andersson / Ternhag, Anders / Giske, Christian G

    European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology

    2022  Volume 41, Issue 7, Page(s) 1093–1098

    Abstract: We investigated the concordance between the Unyvero Hospitalized Pneumonia (HPN) application and quantitative culture for detection of bacterial pathogens from serial lower respiratory tract (LRT) specimens collected from the same subject. Comparison of ... ...

    Abstract We investigated the concordance between the Unyvero Hospitalized Pneumonia (HPN) application and quantitative culture for detection of bacterial pathogens from serial lower respiratory tract (LRT) specimens collected from the same subject. Comparison of results from HPN application and culture was evaluated using 69 LRT samples from 27 subjects, using two evaluation approaches. False positive detections by the HPN application was 29% (20/69) in Evaluation I vs 10% (7/68) in Evaluation II. Additional pathogens detected by the HPN application could be confirmed in many instances by culture positivity for the same organism from previous or subsequent samples from the same subject.
    MeSH term(s) Bacteria/genetics ; COVID-19/diagnosis ; Humans ; Multiplex Polymerase Chain Reaction/methods ; Pneumonia/diagnosis ; Respiratory System ; Respiratory Tract Infections/diagnosis ; Respiratory Tract Infections/microbiology ; Sensitivity and Specificity
    Language English
    Publishing date 2022-06-21
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 603155-9
    ISSN 1435-4373 ; 0934-9723 ; 0722-2211
    ISSN (online) 1435-4373
    ISSN 0934-9723 ; 0722-2211
    DOI 10.1007/s10096-022-04466-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Therapeutic-oligonucleotides activated by nucleases (TOUCAN): A nanocarrier system for the specific delivery of clinical nucleoside analogues.

    Borsa, Baris A / Hernandez, Luiza I / Jiménez, Tania / Tellapragada, Chaitanya / Giske, Christian G / Hernandez, Frank J

    Journal of controlled release : official journal of the Controlled Release Society

    2023  Volume 361, Page(s) 260–269

    Abstract: Nucleoside analogues have been in clinical use since 1960s and they are still used as the first therapeutic option for several cancers and viral infections, due to their high therapeutic efficacy. However, their wide clinical acceptance has been limited ... ...

    Abstract Nucleoside analogues have been in clinical use since 1960s and they are still used as the first therapeutic option for several cancers and viral infections, due to their high therapeutic efficacy. However, their wide clinical acceptance has been limited due to their high toxicity and severe side effects to patients. Herein, we report on a nanocarrier system that delivers nucleosides analogues in a target-specific manner, making nucleoside-based therapeutics safer and with the possibility to be used in other human conditions. This system, named, Therapeutic OligonUCleotides Activated by Nucleases" (TOUCAN) combines: i) the recognition power of oligonucleotides as substrates, ii) the use of nucleases as enzymatic biomarkers and iii) the clinical efficacy of nucleoside analogues, in a single approach. As a proof-of-concept, we report on a TOUCAN that is activated by a specific nuclease produced by bacteria and releases a therapeutic nucleoside, floxuridine. We demonstrate, for the first time, that, by incorporating a therapeutic nucleoside analogue into oligonucleotide probes, we can specifically inhibit bacterial growth in cultures. In this study, Staphylococcus aureus was selected as the targeted bacteria and the TOUCAN strategy successfully inhibited its growth with minimal inhibitory concentration (MIC) values ranging from 0.62 to 40 mg/L across all tested strains. Moreover, our results indicate that the intravenous administration of TOUCANs at a dose of 20 mg/kg over a 24-h period is a highly effective method for treating bacterial infections in a mouse model of pyomyositis. Importantly, no signs of toxicity were observed in our in vitro and in vivo studies. This work can significantly impact the current management of bacterial infections, laying the grounds for the development of a different class of antibiotics. Furthermore, it can provide a safer delivery platform for clinical nucleoside therapeutics in any human conditions, such as cancer and viral infection, where specific nuclease activity has been reported.
    MeSH term(s) Animals ; Mice ; Humans ; Nucleosides/therapeutic use ; Nucleosides/pharmacology ; Oligonucleotides/therapeutic use ; Neoplasms/drug therapy
    Chemical Substances Nucleosides ; Oligonucleotides
    Language English
    Publishing date 2023-08-08
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 632533-6
    ISSN 1873-4995 ; 0168-3659
    ISSN (online) 1873-4995
    ISSN 0168-3659
    DOI 10.1016/j.jconrel.2023.07.057
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Repurposing of antiviral drugs for COVID-19 and impact of repurposed drugs on the nervous system

    Punekar, Madhura / Kshirsagar, Manas / Tellapragada, Chaitanya / Patil, Kanchankumar

    Microbial pathogenesis. 2022 July, v. 168

    2022  

    Abstract: The recent pandemic, Coronavirus Disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has devastated humanity and is continuing to threaten us. Due to the high transmissibility of this pathogen, researchers are ... ...

    Abstract The recent pandemic, Coronavirus Disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has devastated humanity and is continuing to threaten us. Due to the high transmissibility of this pathogen, researchers are still trying to cope with the treatment and prevention of this disease. Few of them were successful in finding cure for COVID-19 by including repurposed drugs in the treatment. In such pandemic situations, when it is nearly impossible to design and implement a new drug target, previously designed antiviral drugs could help against novel viruses, referred to as drug repurposing/redirecting/repositioning or re-profiling. This review describes the current landscape of the repurposing of antiviral drugs for COVID-19 and the impact of these drugs on our nervous system. In some cases, specific antiviral therapy has been notably associated with neurological toxicity, characterized by peripheral neuropathy, neurocognitive and neuropsychiatric effects within the central nervous system (CNS).
    Keywords COVID-19 infection ; Severe acute respiratory syndrome coronavirus 2 ; central nervous system ; drugs ; landscapes ; pandemic ; pathogenesis ; pathogens ; peripheral nervous system diseases ; therapeutics ; toxicity
    Language English
    Dates of publication 2022-07
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 632772-2
    ISSN 1096-1208 ; 0882-4010
    ISSN (online) 1096-1208
    ISSN 0882-4010
    DOI 10.1016/j.micpath.2022.105608
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: New evidence for managing Gram-negative bloodstream infections.

    Nutman, Amir / Tellapragada, Chaitanya / Giske, Christian G / Yahav, Dafna

    Current opinion in infectious diseases

    2021  Volume 34, Issue 6, Page(s) 599–610

    Abstract: Purpose of review: Gram-negative bloodstream infections (GNBSI) are common and carry considerable mortality. Treatment is complicated by increasing antimicrobial resistance, posing a challenge for timely appropriate antibiotics and limiting the choices ... ...

    Abstract Purpose of review: Gram-negative bloodstream infections (GNBSI) are common and carry considerable mortality. Treatment is complicated by increasing antimicrobial resistance, posing a challenge for timely appropriate antibiotics and limiting the choices of effective definitive therapy. The present review aims to summarize recent studies addressing the management of GNBSI.
    Recent findings: New rapid diagnostic tests (RDT) for pathogen identification and antibiotic susceptibility are associated with improved antimicrobial stewardship and reduced length of stay. No mortality benefit or patient-related outcomes are reported. Data regarding the use of new beta-lactam beta-lactamase inhibitors (BLBLIs) for treating multidrug resistance Gram-negative bacteria is supportive, though questions regarding combinations, optimal dosing, mode of administration, and resistance emergence remain to be clarified. Current data regarding cefiderocol necessitates further studies in order to support its use in GNBSI. Shortened (≤7 days) duration of therapy and early oral step down for GNBSI are supported by the literature. The role of repeated blood cultures should be further defined.
    Summary: RDTs should be implemented to improve antibiotic stewardship. Clinical implications on patient-related outcomes should be evaluated. New BLBLIs show promise in the treatment of GNBSI. Additional data are needed regarding the use of cefiderocol. Antibiotic therapy should be shortened and early oral step down should be considered.
    MeSH term(s) Anti-Bacterial Agents/therapeutic use ; Antimicrobial Stewardship ; Bacteremia/diagnosis ; Bacteremia/drug therapy ; Gram-Negative Bacteria ; Gram-Negative Bacterial Infections/diagnosis ; Gram-Negative Bacterial Infections/drug therapy ; Humans ; Microbial Sensitivity Tests ; Sepsis/drug therapy
    Chemical Substances Anti-Bacterial Agents
    Language English
    Publishing date 2021-10-12
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 645085-4
    ISSN 1473-6527 ; 1535-3877 ; 0951-7375 ; 1355-834X
    ISSN (online) 1473-6527 ; 1535-3877
    ISSN 0951-7375 ; 1355-834X
    DOI 10.1097/QCO.0000000000000784
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: The Unyvero Hospital-Acquired pneumonia panel for diagnosis of secondary bacterial pneumonia in COVID-19 patients

    Tellapragada, Chaitanya / Giske, Christian

    medRxiv

    Abstract: The study was undertaken to evaluate the performance of Unyvero Hospitalized Pneumonia Panel (HPN) Application, a multiplex PCR based method for the detection of bacterial pathogens from lower respiratory tract (LRT) samples, obtained from COVID-19 ... ...

    Abstract The study was undertaken to evaluate the performance of Unyvero Hospitalized Pneumonia Panel (HPN) Application, a multiplex PCR based method for the detection of bacterial pathogens from lower respiratory tract (LRT) samples, obtained from COVID-19 patients with suspected secondary hospital-acquired pneumonia. Residual LRT samples obtained from critically ill COVID-19 patients with predetermined microbiological culture results were tested using the Unyvero HPN Application. Performance evaluation of the HPN Application was carried out using the standard-of-care (SoC) microbiological culture findings as the reference method. Eighty-three LRT samples were used in the evaluation. The HPN Application had a full concordance with SoC findings in 59/83 (71%) samples. The new method detected additional bacterial species in 21 (25%) and failed at detecting a bacterial species present in lower respiratory culture in 3 (3.6%) samples. Overall the sensitivity, specificity, positive and negative predictive values of the HPN Application were 95.1% (95%CI: 96.5-98.3%); 98.3% (95% CI: 97.5-98.9%); 71.6% (95% CI: 61.0-80.3%) and 99.8% (95% CI: 99.3-99.9%) respectively. In conclusion, the HPN Application demonstrated higher diagnostic yield in comparison with the culture and generated results within 5 hours.
    Keywords covid19
    Language English
    Publishing date 2020-11-27
    Publisher Cold Spring Harbor Laboratory Press
    Document type Article ; Online
    DOI 10.1101/2020.11.24.20237263
    Database COVID19

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  10. Article: Environmental Factors Associated With Soil Prevalence of the Melioidosis Pathogen

    Shaw, Tushar / Assig, Karoline / Tellapragada, Chaitanya / Wagner, Gabriel E / Choudhary, Madhu / Göhler, André / Eshwara, Vandana Kalwaje / Steinmetz, Ivo / Mukhopadhyay, Chiranjay

    Frontiers in microbiology

    2022  Volume 13, Page(s) 902996

    Abstract: Melioidosis is a seasonal infectious disease in tropical and subtropical areas caused by the soil ... ...

    Abstract Melioidosis is a seasonal infectious disease in tropical and subtropical areas caused by the soil bacterium
    Language English
    Publishing date 2022-07-01
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587354-4
    ISSN 1664-302X
    ISSN 1664-302X
    DOI 10.3389/fmicb.2022.902996
    Database MEDical Literature Analysis and Retrieval System OnLINE

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