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  1. AU="Friedrich, Thomas C"
  2. AU="Sheri, Amna"
  3. AU=Antonaci Fabio
  4. AU="Amilien, Virginie"
  5. AU=Bellomo Rinaldo AU=Bellomo Rinaldo
  6. AU="Wada, Jun"
  7. AU="Evan, Gerard"
  8. AU="Natale, Darren A"
  9. AU="Neznanov, Nickolay S"
  10. AU="Richards, Emily D"
  11. AU="Cho, Kyung-Jin"
  12. AU=Hodos Rachel A
  13. AU="Sahin, Kazim"
  14. AU="Bieri, Jan"
  15. AU="Procter-Murphy, R"
  16. AU=Hauguel-Moreau Marie
  17. AU="Cheng, Delfine"
  18. AU="Stephanie C. Pennington"
  19. AU="O'Hanlon, Karen A"
  20. AU="Heide Glaesmer"
  21. AU="Paget-Bailly, Philippe"
  22. AU="Rory J McCrimmon"
  23. AU="Ahdoot, Aaron I."
  24. AU="Neote, Kuldeep S"
  25. AU="Shen, Congcong"
  26. AU="Rahi, Kosar"
  27. AU="Channabasavaiah, Jagadish Puralae"
  28. AU="Anselmi, Maurizio"
  29. AU="Chauhan, D."
  30. AU="Nicoll, Roger A"
  31. AU="Kwon, Young-Sam"
  32. AU="Mihwa Lee"
  33. AU="Yuanting Jin"
  34. AU="Ter Haar, Eva"
  35. AU="Wolin, Dan L"
  36. AU="Zhang, Tenan"
  37. AU="Piedrafita, Lídia"
  38. AU="Nandy, Ananya"
  39. AU="Bansemer, Sven"
  40. AU="Kochetov, O"
  41. AU="Liu, Fen"

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  1. Artikel ; Online: Influenza evolution with little host selection.

    Braun, Katarina M / Friedrich, Thomas C

    Nature ecology & evolution

    2019  Band 3, Heft 2, Seite(n) 159–160

    Mesh-Begriff(e) Humans ; Influenza, Human/immunology ; Orthomyxoviridae ; Seasons ; Selection, Genetic
    Sprache Englisch
    Erscheinungsdatum 2019-01-07
    Erscheinungsland England
    Dokumenttyp Journal Article ; Comment
    ISSN 2397-334X
    ISSN (online) 2397-334X
    DOI 10.1038/s41559-018-0782-1
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Persistent SARS-CoV-2 infection: significance and implications.

    Machkovech, Heather M / Hahn, Anne M / Garonzik Wang, Jacqueline / Grubaugh, Nathan D / Halfmann, Peter J / Johnson, Marc C / Lemieux, Jacob E / O'Connor, David H / Piantadosi, Anne / Wei, Wanting / Friedrich, Thomas C

    The Lancet. Infectious diseases

    2024  

    Abstract: SARS-CoV-2 causes persistent infections in a subset of individuals, which is a major clinical and public health problem that should be prioritised for further investigation for several reasons. First, persistent SARS-CoV-2 infection often goes ... ...

    Abstract SARS-CoV-2 causes persistent infections in a subset of individuals, which is a major clinical and public health problem that should be prioritised for further investigation for several reasons. First, persistent SARS-CoV-2 infection often goes unrecognised, and therefore might affect a substantial number of people, particularly immunocompromised individuals. Second, the formation of tissue reservoirs (including in non-respiratory tissues) might underlie the pathophysiology of the persistent SARS-CoV-2 infection and require new strategies for diagnosis and treatment. Finally, persistent SARS-CoV-2 replication, particularly in the setting of suboptimal immune responses, is a possible source of new, divergent virus variants that escape pre-existing immunity on the individual and population levels. Defining optimal diagnostic and treatment strategies for patients with persistent virus replication and monitoring viral evolution are therefore urgent medical and public health priorities.
    Sprache Englisch
    Erscheinungsdatum 2024-02-07
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Review
    ZDB-ID 2061641-7
    ISSN 1474-4457 ; 1473-3099
    ISSN (online) 1474-4457
    ISSN 1473-3099
    DOI 10.1016/S1473-3099(23)00815-0
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel: Determining the source of transmission of SARS-CoV-2 infection in a healthcare worker.

    Safdar, Nasia / Moreno, Gage K / Braun, Katarina M / Friedrich, Thomas C / O'Connor, David H

    medRxiv : the preprint server for health sciences

    2020  

    Abstract: Healthcare workers (HCWs) are at the frontlines of the COVID-19 pandemic and are at risk of exposure to SARS-CoV-2 infection from their interactions with patients and in the community. Limited availability of recommended personal protective equipment ( ... ...

    Abstract Healthcare workers (HCWs) are at the frontlines of the COVID-19 pandemic and are at risk of exposure to SARS-CoV-2 infection from their interactions with patients and in the community. Limited availability of recommended personal protective equipment (PPE), in particular N95 respirators, has fueled concerns about whether HCWs are adequately protected from exposure while caring for patients. Understanding the source of SARS-CoV-2 infection in a HCW - the community or the healthcare system - is critical for understanding the effectiveness of hospital infection control and PPE practices. In Dane County, Wisconsin, community prevalence of SARS-CoV-2 is relatively low (cumulative prevalence of ~0.06% - positive cases / total population in Dane county as of April 17). Although SARS-CoV-2 infections in HCWs are often presumed to be acquired during the course of patient care, there are few reports unambiguously identifying the source of acquisition. The objective of this brief report was to determine the source of transmission of SARS-CoV-2 in a healthcare worker.
    Schlagwörter covid19
    Sprache Englisch
    Erscheinungsdatum 2020-05-01
    Erscheinungsland United States
    Dokumenttyp Preprint
    DOI 10.1101/2020.04.27.20077016
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Using Virus Sequencing to Determine Source of SARS-CoV-2 Transmission for Healthcare Worker.

    Safdar, Nasia / Moreno, Gage K / Braun, Katarina M / Friedrich, Thomas C / O'Connor, David H

    Emerging infectious diseases

    2020  Band 26, Heft 10, Seite(n) 2489–2491

    Abstract: Whether a healthcare worker's severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection is community or hospital acquired affects prevention practices. We used virus sequencing to determine that infection of a healthcare worker who cared for ...

    Abstract Whether a healthcare worker's severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection is community or hospital acquired affects prevention practices. We used virus sequencing to determine that infection of a healthcare worker who cared for 2 SARS-CoV-2-infected patients was probably community acquired. Appropriate personal protective equipment may have protected against hospital-acquired infection.
    Mesh-Begriff(e) Betacoronavirus ; COVID-19 ; Community-Acquired Infections/virology ; Coronavirus Infections/transmission ; Coronavirus Infections/virology ; Health Personnel ; Humans ; Infectious Disease Transmission, Patient-to-Professional/prevention & control ; Occupational Diseases/prevention & control ; Pandemics ; Personal Protective Equipment ; Pneumonia, Viral/transmission ; Pneumonia, Viral/virology ; RNA, Viral/analysis ; SARS-CoV-2 ; Sequence Analysis, RNA
    Chemische Substanzen RNA, Viral
    Schlagwörter covid19
    Sprache Englisch
    Erscheinungsdatum 2020-08-06
    Erscheinungsland United States
    Dokumenttyp Case Reports ; Letter
    ZDB-ID 1380686-5
    ISSN 1080-6059 ; 1080-6040
    ISSN (online) 1080-6059
    ISSN 1080-6040
    DOI 10.3201/eid2610.202322
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel ; Online: Wolbachia-mediated resistance to Zika virus infection in Aedes aegypti is dominated by diverse transcriptional regulation and weak evolutionary pressures.

    Boehm, Emma C / Jaeger, Anna S / Ries, Hunter J / Castañeda, David / Weiler, Andrea M / Valencia, Corina C / Weger-Lucarelli, James / Ebel, Gregory D / O'Connor, Shelby L / Friedrich, Thomas C / Zamanian, Mostafa / Aliota, Matthew T

    PLoS neglected tropical diseases

    2023  Band 17, Heft 10, Seite(n) e0011674

    Abstract: A promising candidate for arbovirus control and prevention relies on replacing arbovirus-susceptible Aedes aegypti populations with mosquitoes that have been colonized by the intracellular bacterium Wolbachia and thus have a reduced capacity to transmit ... ...

    Abstract A promising candidate for arbovirus control and prevention relies on replacing arbovirus-susceptible Aedes aegypti populations with mosquitoes that have been colonized by the intracellular bacterium Wolbachia and thus have a reduced capacity to transmit arboviruses. This reduced capacity to transmit arboviruses is mediated through a phenomenon referred to as pathogen blocking. Pathogen blocking has primarily been proposed as a tool to control dengue virus (DENV) transmission, however it works against a range of viruses, including Zika virus (ZIKV). Despite years of research, the molecular mechanisms underlying pathogen blocking still need to be better understood. Here, we used RNA-seq to characterize mosquito gene transcription dynamics in Ae. aegypti infected with the wMel strain of Wolbachia that are being released by the World Mosquito Program in Medellín, Colombia. Comparative analyses using ZIKV-infected, uninfected tissues, and mosquitoes without Wolbachia revealed that the influence of wMel on mosquito gene transcription is multifactorial. Importantly, because Wolbachia limits, but does not completely prevent, replication of ZIKV and other viruses in coinfected mosquitoes, there is a possibility that these viruses could evolve resistance to pathogen blocking. Therefore, to understand the influence of Wolbachia on within-host ZIKV evolution, we characterized the genetic diversity of molecularly barcoded ZIKV virus populations replicating in Wolbachia-infected mosquitoes and found that within-host ZIKV evolution was subject to weak purifying selection and, unexpectedly, loose anatomical bottlenecks in the presence and absence of Wolbachia. Together, these findings suggest that there is no clear transcriptional profile associated with Wolbachia-mediated ZIKV restriction, and that there is no evidence for ZIKV escape from this restriction in our system.
    Mesh-Begriff(e) Animals ; Zika Virus/genetics ; Zika Virus Infection ; Aedes/physiology ; Wolbachia/physiology ; Dengue Virus/physiology ; Mosquito Vectors
    Sprache Englisch
    Erscheinungsdatum 2023-10-02
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 2429704-5
    ISSN 1935-2735 ; 1935-2735
    ISSN (online) 1935-2735
    ISSN 1935-2735
    DOI 10.1371/journal.pntd.0011674
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel: Wolbachia

    Boehm, Emma C / Jaeger, Anna S / Ries, Hunter J / Castañeda, David / Weiler, Andrea M / Valencia, Corina C / Weger-Lucarelli, James / Ebel, Gregory D / O'Connor, Shelby L / Friedrich, Thomas C / Zamanian, Mostafa / Aliota, Matthew T

    bioRxiv : the preprint server for biology

    2023  

    Abstract: A promising candidate for arbovirus control and prevention relies on replacing arbovirus-susceptible : Author summary: ... ...

    Abstract A promising candidate for arbovirus control and prevention relies on replacing arbovirus-susceptible
    Author summary: When
    Sprache Englisch
    Erscheinungsdatum 2023-06-26
    Erscheinungsland United States
    Dokumenttyp Preprint
    DOI 10.1101/2023.06.26.546271
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel ; Online: Gain without pain: adaptation and increased virulence of Zika virus in vertebrate host without fitness cost in mosquito vector.

    Jaeger, Anna S / Marano, Jeffrey / Riemersma, Kasen K / Castaneda, David / Pritchard, Elise M / Pritchard, Julia C / Bohm, Ellie K / Baczenas, John J / O'Connor, Shelby L / Weger-Lucarelli, James / Friedrich, Thomas C / Aliota, Matthew T

    Journal of virology

    2023  Band 97, Heft 10, Seite(n) e0116223

    Abstract: Importance: Previously, we modeled direct transmission chains of Zika virus (ZIKV) by serially passaging ZIKV in mice and mosquitoes and found that direct mouse transmission chains selected for viruses with increased virulence in mice and the ... ...

    Abstract Importance: Previously, we modeled direct transmission chains of Zika virus (ZIKV) by serially passaging ZIKV in mice and mosquitoes and found that direct mouse transmission chains selected for viruses with increased virulence in mice and the acquisition of non-synonymous amino acid substitutions. Here, we show that these same mouse-passaged viruses also maintain fitness and transmission capacity in mosquitoes. We used infectious clone-derived viruses to demonstrate that the substitution in nonstructural protein 4A contributes to increased virulence in mice.
    Mesh-Begriff(e) Animals ; Mice ; Culicidae/virology ; Mosquito Vectors/virology ; Virulence/genetics ; Zika Virus/chemistry ; Zika Virus/genetics ; Zika Virus/pathogenicity ; Zika Virus Infection/transmission ; Zika Virus Infection/virology ; Serial Passage ; Amino Acid Substitution ; Genetic Fitness/genetics
    Sprache Englisch
    Erscheinungsdatum 2023-10-06
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 80174-4
    ISSN 1098-5514 ; 0022-538X
    ISSN (online) 1098-5514
    ISSN 0022-538X
    DOI 10.1128/jvi.01162-23
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel: Gain without pain: Adaptation and increased virulence of Zika virus in vertebrate host without fitness cost in mosquito vector.

    Jaeger, Anna S / Marano, Jeffrey / Riemersma, Kasen / Castañeda, David / Pritchard, Elise / Pritchard, Julia / Bohm, Ellie K / Baczenas, John J / O'Connor, Shelby L / Weger-Lucarelli, James / Friedrich, Thomas C / Aliota, Matthew T

    bioRxiv : the preprint server for biology

    2023  

    Abstract: Zika virus (ZIKV) is now in a post-pandemic period, for which the potential for re-emergence and future spread is unknown. Adding to this uncertainty is the unique capacity of ZIKV to directly transmit between humans via sexual transmission. Recently, we ...

    Abstract Zika virus (ZIKV) is now in a post-pandemic period, for which the potential for re-emergence and future spread is unknown. Adding to this uncertainty is the unique capacity of ZIKV to directly transmit between humans via sexual transmission. Recently, we demonstrated that direct transmission of ZIKV between vertebrate hosts leads to rapid adaptation resulting in enhanced virulence in mice and the emergence of three amino acid substitutions (NS2A-A117V, NS2A-A117T, and NS4A-E19G) shared among all vertebrate-passaged lineages. Here, we further characterized these host-adapted viruses and found that vertebrate-passaged viruses also have enhanced transmission potential in mosquitoes. To understand the contribution of genetic changes to the enhanced virulence and transmission phenotype, we engineered these amino acid substitutions, singly and in combination, into a ZIKV infectious clone. We found that NS4A-E19G contributed to the enhanced virulence and mortality phenotype in mice. Further analyses revealed that NS4A-E19G results in increased neurotropism and distinct innate immune signaling patterns in the brain. None of the substitutions contributed to changes in transmission potential in mosquitoes. Together, these findings suggest that direct transmission chains could enable the emergence of more virulent ZIKV strains without compromising mosquito transmission capacity, although the underlying genetics of these adaptations are complex.
    Sprache Englisch
    Erscheinungsdatum 2023-03-20
    Erscheinungsland United States
    Dokumenttyp Preprint
    DOI 10.1101/2023.03.20.533515
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  9. Artikel: Avian H7N9 influenza viruses are evolutionarily constrained by stochastic processes during replication and transmission in mammals.

    Braun, Katarina M / Haddock Iii, Luis A / Crooks, Chelsea M / Barry, Gabrielle L / Lalli, Joseph / Neumann, Gabriele / Watanabe, Tokiko / Imai, Masaki / Yamayoshi, Seiya / Ito, Mutsumi / Moncla, Louise H / Koelle, Katia / Kawaoka, Yoshihiro / Friedrich, Thomas C

    Virus evolution

    2023  Band 9, Heft 1, Seite(n) vead004

    Abstract: H7N9 avian influenza viruses (AIVs) have caused over 1,500 documented human infections since emerging in 2013. Although wild-type H7N9 AIVs can be transmitted by respiratory droplets in ferrets, they have not yet caused widespread outbreaks in humans. ... ...

    Abstract H7N9 avian influenza viruses (AIVs) have caused over 1,500 documented human infections since emerging in 2013. Although wild-type H7N9 AIVs can be transmitted by respiratory droplets in ferrets, they have not yet caused widespread outbreaks in humans. Previous studies have revealed molecular determinants of H7N9 AIV host switching, but little is known about potential evolutionary constraints on this process. Here, we compare patterns of sequence evolution for H7N9 AIV and mammalian H1N1 viruses during replication and transmission in ferrets. We show that three main factors-purifying selection, stochasticity, and very narrow transmission bottlenecks-combine to severely constrain the ability of H7N9 AIV to effectively adapt to mammalian hosts in isolated, acute spillover events. We find rare evidence of natural selection favoring new, potentially mammal-adapting mutations within ferrets but no evidence of natural selection acting during transmission. We conclude that human-adapted H7N9 viruses are unlikely to emerge during typical spillover infections. Our findings are instead consistent with a model in which the emergence of a human-transmissible virus would be a rare and unpredictable, though highly consequential, 'jackpot' event. Strategies to control the total number of spillover infections will limit opportunities for the virus to win this evolutionary lottery.
    Sprache Englisch
    Erscheinungsdatum 2023-01-19
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2818949-8
    ISSN 2057-1577
    ISSN 2057-1577
    DOI 10.1093/ve/vead004
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  10. Artikel ; Online: Influenza Evolution: New Insights into an Old Foe.

    Moncla, Louise H / Florek, Kelsey R / Friedrich, Thomas C

    Trends in microbiology

    2017  Band 25, Heft 6, Seite(n) 432–434

    Abstract: Influenza viruses steadily evolve to escape detection by antibodies, necessitating vaccine updates. A new study uses a massively parallel approach, deep mutational scanning, to catalogue antibody escape mutations. This approach defines potential pathways ...

    Abstract Influenza viruses steadily evolve to escape detection by antibodies, necessitating vaccine updates. A new study uses a massively parallel approach, deep mutational scanning, to catalogue antibody escape mutations. This approach defines potential pathways of viral evolution, beyond those already observed in natural infections, and may help predict its future directions.
    Mesh-Begriff(e) Antibodies, Neutralizing/immunology ; Antibodies, Viral/immunology ; Antigens, Viral/genetics ; Antigens, Viral/immunology ; Evolution, Molecular ; Genetic Variation ; Humans ; Influenza A virus/genetics ; Influenza A virus/immunology ; Influenza Vaccines ; Influenza, Human/immunology ; Influenza, Human/virology ; Mutation
    Chemische Substanzen Antibodies, Neutralizing ; Antibodies, Viral ; Antigens, Viral ; Influenza Vaccines
    Sprache Englisch
    Erscheinungsdatum 2017-05-03
    Erscheinungsland England
    Dokumenttyp Journal Article ; Comment
    ZDB-ID 1158963-2
    ISSN 1878-4380 ; 0966-842X
    ISSN (online) 1878-4380
    ISSN 0966-842X
    DOI 10.1016/j.tim.2017.04.003
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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