10 results on '"bat lyssavirus"'
Search Results
2. Retrospective Enhanced Bat Lyssavirus Surveillance in Germany between 2018–2020
- Author
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Antonia Klein, Sten Calvelage, Kore Schlottau, Bernd Hoffmann, Elisa Eggerbauer, Thomas Müller, and Conrad M. Freuling
- Subjects
bat lyssavirus ,bat rabies surveillance ,European bat lyssavirus 1 (EBLV-1) ,Bokeloh bat lyssavirus (BBLV) ,zoonosis ,Microbiology ,QR1-502 - Abstract
Lyssaviruses are the causative agents for rabies, a zoonotic and fatal disease. Bats are the ancestral reservoir host for lyssaviruses, and at least three different lyssaviruses have been found in bats from Germany. Across Europe, novel lyssaviruses were identified in bats recently and occasional spillover infections in other mammals and human cases highlight their public health relevance. Here, we report the results from an enhanced passive bat rabies surveillance that encompasses samples without human contact that would not be tested under routine conditions. To this end, 1236 bat brain samples obtained between 2018 and 2020 were screened for lyssaviruses via several RT-qPCR assays. European bat lyssavirus type 1 (EBLV-1) was dominant, with 15 positives exclusively found in serotine bats (Eptesicus serotinus) from northern Germany. Additionally, when an archived set of bat samples that had tested negative for rabies by the FAT were screened in the process of assay validation, four samples tested EBLV-1 positive, including two detected in Pipistrellus pipistrellus. Subsequent phylogenetic analysis of 17 full genomes assigned all except one of these viruses to the A1 cluster of the EBLV-1a sub-lineage. Furthermore, we report here another Bokeloh bat lyssavirus (BBLV) infection in a Natterer’s bat (Myotis nattereri) found in Lower Saxony, the tenth reported case of this novel bat lyssavirus.
- Published
- 2021
- Full Text
- View/download PDF
3. Tentative novel lyssavirus in a bat in Finland.
- Author
-
Nokireki, T., Tammiranta, N., Kokkonen, U.‐M., Kantala, T., and Gadd, T.
- Subjects
- *
LYSSAVIRUS , *BAT diseases , *PHYLOGENY , *MYOTIS brandtii , *FLUORESCENCE - Abstract
Summary: A tentative novel member of the genus
Lyssavirus , designated asKotalahti bat lyssavirus , was detected in a Brandt's bat (Myotis brandtii ) in Finland. Based on phylogenetic analysis, the virus differs from other known lyssaviruses, being closely related to Khujand virus, Aravan virus, Bokeloh bat lyssavirus and European bat lyssavirus 2. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
4. Retrospective Enhanced Bat Lyssavirus Surveillance in Germany between 2018–2020
- Author
-
Bernd Hoffmann, Antonia Klein, Elisa Eggerbauer, Kore Schlottau, Sten Calvelage, Thomas Müller, and Conrad M. Freuling
- Subjects
Male ,0301 basic medicine ,030106 microbiology ,medicine.disease_cause ,Viral Zoonoses ,Microbiology ,bat lyssavirus ,bat rabies surveillance ,03 medical and health sciences ,Bokeloh bat lyssavirus (BBLV) ,Chiroptera ,Germany ,Rhabdoviridae Infections ,Virology ,medicine ,Animals ,Eptesicus serotinus ,Pipistrellus pipistrellus ,Lyssavirus ,Phylogeny ,Disease Reservoirs ,Retrospective Studies ,biology ,Communication ,Myotis nattereri ,Zoonosis ,zoonosis ,biology.organism_classification ,medicine.disease ,QR1-502 ,030104 developmental biology ,Infectious Diseases ,European bat lyssavirus 1 (EBLV-1) ,Bokeloh bat lyssavirus ,Epidemiological Monitoring ,RNA, Viral ,Fatal disease ,Female ,Rabies - Abstract
Lyssaviruses are the causative agents for rabies, a zoonotic and fatal disease. Bats are the ancestral reservoir host for lyssaviruses, and at least three different lyssaviruses have been found in bats from Germany. Across Europe, novel lyssaviruses were identified in bats recently and occasional spillover infections in other mammals and human cases highlight their public health relevance. Here, we report the results from an enhanced passive bat rabies surveillance that encompasses samples without human contact that would not be tested under routine conditions. To this end, 1236 bat brain samples obtained between 2018 and 2020 were screened for lyssaviruses via several RT-qPCR assays. European bat lyssavirus type 1 (EBLV-1) was dominant, with 15 positives exclusively found in serotine bats (Eptesicus serotinus) from northern Germany. Additionally, when an archived set of bat samples that had tested negative for rabies by the FAT were screened in the process of assay validation, four samples tested EBLV-1 positive, including two detected in Pipistrellus pipistrellus. Subsequent phylogenetic analysis of 17 full genomes assigned all except one of these viruses to the A1 cluster of the EBLV-1a sub-lineage. Furthermore, we report here another Bokeloh bat lyssavirus (BBLV) infection in a Natterer’s bat (Myotis nattereri) found in Lower Saxony, the tenth reported case of this novel bat lyssavirus.
- Published
- 2021
5. Retrospective Enhanced Bat Lyssavirus Surveillance in Germany between 2018–2020.
- Author
-
Klein, Antonia, Calvelage, Sten, Schlottau, Kore, Hoffmann, Bernd, Eggerbauer, Elisa, Müller, Thomas, and Freuling, Conrad M.
- Subjects
RABIES ,ZOONOSES ,BATS ,MYOTIS - Abstract
Lyssaviruses are the causative agents for rabies, a zoonotic and fatal disease. Bats are the ancestral reservoir host for lyssaviruses, and at least three different lyssaviruses have been found in bats from Germany. Across Europe, novel lyssaviruses were identified in bats recently and occasional spillover infections in other mammals and human cases highlight their public health relevance. Here, we report the results from an enhanced passive bat rabies surveillance that encompasses samples without human contact that would not be tested under routine conditions. To this end, 1236 bat brain samples obtained between 2018 and 2020 were screened for lyssaviruses via several RT-qPCR assays. European bat lyssavirus type 1 (EBLV-1) was dominant, with 15 positives exclusively found in serotine bats (Eptesicus serotinus) from northern Germany. Additionally, when an archived set of bat samples that had tested negative for rabies by the FAT were screened in the process of assay validation, four samples tested EBLV-1 positive, including two detected in Pipistrellus pipistrellus. Subsequent phylogenetic analysis of 17 full genomes assigned all except one of these viruses to the A1 cluster of the EBLV-1a sub-lineage. Furthermore, we report here another Bokeloh bat lyssavirus (BBLV) infection in a Natterer's bat (Myotis nattereri) found in Lower Saxony, the tenth reported case of this novel bat lyssavirus. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
6. Tentative novel lyssavirus in a bat in Finland
- Author
-
Niina Tammiranta, Tuija Gadd, Tiina Nokireki, Ulla-Maija Kokkonen, and Tuija Kantala
- Subjects
0301 basic medicine ,Myotis brandtii ,rabies ,medicine.disease_cause ,Virus ,bat lyssavirus ,03 medical and health sciences ,Chiroptera ,medicine ,Animals ,Lyssavirus ,Finland ,Phylogeny ,Genus Lyssavirus ,General Veterinary ,General Immunology and Microbiology ,biology ,Phylogenetic tree ,General Medicine ,medicine.disease ,biology.organism_classification ,Virology ,3. Good health ,Khujand virus ,030104 developmental biology ,Bokeloh bat lyssavirus ,Rabies - Abstract
A tentative novel member of the genus Lyssavirus, designated as Kotalahti bat lyssavirus, was detected in a Brandt's bat (Myotis brandtii) in Finland. Based on phylogenetic analysis, the virus differs from other known lyssaviruses, being closely related to Khujand virus, Aravan virus, Bokeloh bat lyssavirus and European bat lyssavirus 2.
- Published
- 2017
7. Molecular double-check strategy for the identification and characterization of European Lyssaviruses
- Author
-
Anne Wegelt, Martin Beer, Thomas Bruun Rasmussen, Bernd Hoffmann, Anthony R. Fooks, Engbert A. Kooi, Katja Voller, Thomas Müller, Conrad M. Freuling, Melina Fischer, and Denise A. Marston
- Subjects
diagnosis ,Rabies ,rt-pcr ,real-time ,Biology ,medicine.disease_cause ,germany ,human rabies ,Real-Time Polymerase Chain Reaction ,Diagnostics & Crisis Organization ,bat lyssavirus ,Chiroptera ,Virology ,Molecular diagnostics ,medicine ,Animals ,Humans ,Double check ,Multiplex ,Lyssavirus ,virus detection ,Diagnostiek & Crisisorganisatie ,Rabies virus ,Gold standard (test) ,assay ,medicine.disease ,biology.organism_classification ,infection ,Real-time RT-PCR ,Europe ,Bokeloh bat lyssavirus ,Molecular Diagnostic Techniques ,developing-countries ,Algorithms - Abstract
The “gold standard” for post-mortem rabies diagnosis is the direct fluorescent antibody test (FAT). However, in the case of ante-mortem non-neural sample material or decomposed tissues, the FAT reaches its limit, and the use of molecular techniques can be advantageous. In this study, we developed and validated a reverse transcription PCR cascade protocol feasible for the classification of samples, even those for which there is no epidemiological background knowledge. This study emphasises on the most relevant European lyssaviruses.In a first step, two independent N- and L-gene based pan-lyssavirus intercalating dye assays are performed in a double-check application to increase the method's diagnostic safety. For the second step, characterization of the lyssavirus positive samples via two independent multiplex PCR-systems was performed. Both assays were probe-based, species-specific multiplex PCR-systems for Rabies virus, European bat lyssavirus type 1 and 2 as well as Bokeloh bat lyssavirus. All assays were validated successfully with a comprehensive panel of lyssavirus positive samples, as well as negative material from various host species.This double-check strategy allows for both safe and sensitive screening, detection and characterization of all lyssavirus species of humans and animals, as well as the rapid identification of currently unknown lyssaviruses in bats in Europe.
- Published
- 2014
- Full Text
- View/download PDF
8. A Two-Step Lyssavirus Real-Time Polymerase Chain Reaction Using Degenerate Primers with Superior Sensitivity to the Fluorescent Antigen Test
- Author
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Vanessa Suin, Sophie Lamoral, Stéphane De Craeye, Aurélie Francart, Florence Nazé, Steven Van Gucht, and Michael Kalai
- Subjects
Fluorescent Antibody Technique ,lcsh:Medicine ,medicine.disease_cause ,law.invention ,BAT LYSSAVIRUS ,Mice ,Limit of Detection ,law ,Chiroptera ,INFECTION ,ASSAY ,Polymerase chain reaction ,Reverse Transcriptase Polymerase Chain Reaction ,Brain ,General Medicine ,Real-time polymerase chain reaction ,Vesicular stomatitis virus ,RNA, Viral ,GERMANY ,Research Article ,Article Subject ,Molecular Sequence Data ,Biology ,Real-Time Polymerase Chain Reaction ,DIAGNOSIS ,General Biochemistry, Genetics and Molecular Biology ,Virus ,Dogs ,GENUS ,Rhabdoviridae Infections ,medicine ,Animals ,Humans ,Computer Simulation ,Veterinary Sciences ,Lyssavirus ,Base Sequence ,General Immunology and Microbiology ,lcsh:R ,Rabies virus ,Reproducibility of Results ,MOUSE INOCULATION TEST ,GENOTYPES ,biology.organism_classification ,Virology ,Molecular biology ,Reverse transcriptase ,RT-PCR METHOD ,Cats ,Sequence Alignment ,Nested polymerase chain reaction ,RABIES-RELATED VIRUSES - Abstract
A generic two-step lyssavirus real-time reverse transcriptase polymerase chain reaction (qRT-PCR), based on a nested PCR strategy, was validated for the detection of different lyssavirus species. Primers with 17 to 30% of degenerate bases were used in both consecutive steps. The assay could accurately detect RABV, LBV, MOKV, DUVV, EBLV-1, EBLV-2, and ABLV.In silicosequence alignment showed a functional match with the remaining lyssavirus species. The diagnostic specificity was 100% and the sensitivity proved to be superior to that of the fluorescent antigen test. The limit of detection was ≤1 50% tissue culture infectious dose. The related vesicular stomatitis virus was not recognized, confirming the selectivity for lyssaviruses. The assay was applied to follow the evolution of rabies virus infection in the brain of mice from 0 to 10 days after intranasal inoculation. The obtained RNA curve corresponded well with the curves obtained by a one-step monospecific RABV-qRT-PCR, the fluorescent antigen test, and virus titration. Despite the presence of degenerate bases, the assay proved to be highly sensitive, specific, and reproducible.
- Published
- 2014
- Full Text
- View/download PDF
9. Molecular double-check strategy for the identification and characterization of European Lyssaviruses
- Author
-
Fischer, M., Freuling, C.M., Müller, T., Wegelt, A., Kooi, E.A., Rasmussen, T.B., Voller, K., Marston, D.A., Fooks, A.R., Beer, M., Hoffmann, B., Fischer, M., Freuling, C.M., Müller, T., Wegelt, A., Kooi, E.A., Rasmussen, T.B., Voller, K., Marston, D.A., Fooks, A.R., Beer, M., and Hoffmann, B.
- Abstract
The “gold standard” for post-mortem rabies diagnosis is the direct fluorescent antibody test (FAT). However, in the case of ante-mortem non-neural sample material or decomposed tissues, the FAT reaches its limit, and the use of molecular techniques can be advantageous. In this study, we developed and validated a reverse transcription PCR cascade protocol feasible for the classification of samples, even those for which there is no epidemiological background knowledge. This study emphasises on the most relevant European lyssaviruses. In a first step, two independent N- and L-gene based pan-lyssavirus intercalating dye assays are performed in a double-check application to increase the method's diagnostic safety. For the second step, characterization of the lyssavirus positive samples via two independent multiplex PCR-systems was performed. Both assays were probe-based, species-specific multiplex PCR-systems for Rabies virus, European bat lyssavirus type 1 and 2 as well as Bokeloh bat lyssavirus. All assays were validated successfully with a comprehensive panel of lyssavirus positive samples, as well as negative material from various host species. This double-check strategy allows for both safe and sensitive screening, detection and characterization of all lyssavirus species of humans and animals, as well as the rapid identification of currently unknown lyssaviruses in bats in Europe.
- Published
- 2014
10. Advances in rabies prophylaxis and treatment with emphasis on immunoresponse mechanisms.
- Author
-
El-Sayed A
- Abstract
Rabies is a vaccine-preventable fatal disease in man and most mammals. Although rabies is recorded in 150 territories and is responsible for at least 60,000 human deaths every year worldwide, it is a neglected tropical problem. Most of the rabies free countries are considered to be fragile free as the disease may re-emerge easily through wild mammals. For the performance of effective rabies eradication programs, a complex set of strategies and activities is required. At the time, a joint project of WHO-OIE-FAO which was announced in 2015, plans to control animal-human-ecosystems rabies interface. For effective rabies control, prophylactic policies must be applied. These include various educational outreaches for farmers and people living in endemic areas, enforced legislation for responsible dog ownership, control programs for the free-ranging stray dog and cat populations, field large-scale vaccination campaigns, and the development of new vaccine delivery strategies for both humans and animals. The present work presents the advances in the development of new safe, effective and economic vaccines for domestic dogs, and oral vaccines for the control of the disease in wild animals. It presents also some therapeutic protocols used for the treatment of patients.
- Published
- 2018
- Full Text
- View/download PDF
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