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Article: The 28S rRNA RT-qPCR assay for host depletion evaluation to enhance avian virus detection in Illumina and Nanopore sequencing.

Goraichuk, Iryna V / Harden, Mark / Spackman, Erica / Suarez, David L

2024 Volume 15, Page(s) 1328987

Abstract: Abundant host and bacterial sequences can obscure the detection of less prevalent viruses in untargeted next-generation sequencing (NGS). Efficient removal of these non-targeted sequences is vital for accurate viral detection. This study presents a novel ...

Abstract	Abundant host and bacterial sequences can obscure the detection of less prevalent viruses in untargeted next-generation sequencing (NGS). Efficient removal of these non-targeted sequences is vital for accurate viral detection. This study presents a novel 28S ribosomal RNA (rRNA) RT-qPCR assay designed to assess the efficiency of avian rRNA depletion before conducting costly NGS for the detection of avian RNA viruses. The comprehensive evaluation of this 28S-test focuses on substituting DNase I with alternative DNases in our established depletion protocols and finetuning essential parameters for reliable host rRNA depletion. To validate the effectiveness of the 28S-test, we compared its performance with NGS results obtained from both Illumina and Nanopore sequencing platforms. This evaluation utilized swab samples from chickens infected with highly pathogenic avian influenza virus, subjected to established and modified depletion protocols. Both methods significantly reduced host rRNA levels, but using the alternative DNase had superior performance. Additionally, utilizing the 28S-test, we explored cost- and time-effective strategies, such as reduced probe concentrations and other alternative DNase usage, assessed the impact of filtration pre-treatment, and evaluated various experimental parameters to further optimize the depletion protocol. Our findings underscore the value of the 28S-test in optimizing depletion methods for advancing improvements in avian disease research through NGS.
Language	English
Publishing date	2024-01-31
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2587354-4
ISSN	1664-302X
ISSN	1664-302X
DOI	10.3389/fmicb.2024.1328987
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Article ; Online: Alternative probe hybridization buffers for target RNA depletion and viral sequence recovery in NGS for poultry samples.

Bakre, Abhijeet / Kariithi, Henry M / Suarez, David L

Journal of virological methods

2023 Volume 321, Page(s) 114793

Abstract: Non-targeted next generation sequencing (NGS) is widely applied to identify the diversity of pathogens in field samples. However, abundance of host RNA (especially rRNA) and other environmental nucleic acids can reduce the abundance of pathogen specific ... ...

Abstract	Non-targeted next generation sequencing (NGS) is widely applied to identify the diversity of pathogens in field samples. However, abundance of host RNA (especially rRNA) and other environmental nucleic acids can reduce the abundance of pathogen specific reads of interest, reduce depth of coverage and increase surveillance costs. We presently deplete chicken- and selected bacterial-specific rRNAs in poultry field RNA samples with complementary DNA probes in a commercially available probe hybridization buffer followed by digestion of the RNA:DNA hybrids with RNase H. Because the current buffer is an expensive special order reagent of proprietary composition, we tested in-house and other commercially available buffers and identified a viable alternative that yields equivalent host rRNA depletion and viral-specific reads in poultry samples as the current special order reagent but at a reduced cost.
MeSH term(s)	Animals ; RNA ; Poultry ; Nucleic Acid Hybridization ; Nucleic Acids ; High-Throughput Nucleotide Sequencing
Chemical Substances	RNA (63231-63-0) ; Nucleic Acids
Language	English
Publishing date	2023-08-20
Publishing country	Netherlands
Document type	Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	8013-5
ISSN	1879-0984 ; 0166-0934
ISSN (online)	1879-0984
ISSN	0166-0934
DOI	10.1016/j.jviromet.2023.114793
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Article: Non-target RNA depletion strategy to improve sensitivity of next-generation sequencing for the detection of RNA viruses in poultry

Parris, D. Joshua / Kariithi, Henry / Suarez, David L.

Journal of veterinary diagnostic investigation. 2022 July, v. 34, no. 4

2022

Abstract: PCR-based assays have become the benchmark for detecting pathogens of poultry and other livestock; however, these techniques are limited in their ability to detect multiple infecting agents, provide limited genetic information on the pathogen, and, for ... ...

Abstract	PCR-based assays have become the benchmark for detecting pathogens of poultry and other livestock; however, these techniques are limited in their ability to detect multiple infecting agents, provide limited genetic information on the pathogen, and, for RNA viruses, must be reviewed frequently to assure high sensitivity and specificity. In contrast, untargeted, high-throughput sequencing can rapidly detect all infecting agents in a sample while providing genomic sequence information to allow more in-depth characterization of viruses. Although next-generation sequencing (NGS) offers many advantages, one of its primary limitations is low sensitivity to pathogens given the abundance of host and other non-target sequences in sequencing libraries. We explored methods for improving the sensitivity of NGS to detect respiratory and enteric viruses in poultry from RNA extracts of swab samples. We employed commercial and custom-designed negative enrichment strategies to selectively deplete the most abundant rRNA reads from the host and non-target bacteria; host RNA was diminished from up to 40% of total reads to as low as 3%, and the total number of reads assigned to abundant bacterial classes were reduced greatly. Our treatment resulted in up to a 700-fold increase in the number of viral reads, detection of a greater number of viral agents, and higher average genome coverage for pathogens. Depletion assays added only 2 h to the NGS library preparation workflow. Custom depletion probe design offered significant cost savings (US$7–12 per sample) compared to commercial kits (US$30–50 per sample).
Keywords	genome ; nucleotide sequences ; pathogens ; polymerase chain reaction ; poultry
Language	English
Dates of publication	2022-07
Size	p. 638-645.
Publishing place	SAGE Publications
Document type	Article
ZDB-ID	287603-6
ISSN	1943-4936 ; 1040-6387
ISSN (online)	1943-4936
ISSN	1040-6387
DOI	10.1177/10406387221102430
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Article ; Online: Non-target RNA depletion strategy to improve sensitivity of next-generation sequencing for the detection of RNA viruses in poultry.

Parris, D Joshua / Kariithi, Henry / Suarez, David L

Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc

2022 Volume 34, Issue 4, Page(s) 638–645

Abstract	PCR-based assays have become the benchmark for detecting pathogens of poultry and other livestock; however, these techniques are limited in their ability to detect multiple infecting agents, provide limited genetic information on the pathogen, and, for RNA viruses, must be reviewed frequently to assure high sensitivity and specificity. In contrast, untargeted, high-throughput sequencing can rapidly detect all infecting agents in a sample while providing genomic sequence information to allow more in-depth characterization of viruses. Although next-generation sequencing (NGS) offers many advantages, one of its primary limitations is low sensitivity to pathogens given the abundance of host and other non-target sequences in sequencing libraries. We explored methods for improving the sensitivity of NGS to detect respiratory and enteric viruses in poultry from RNA extracts of swab samples. We employed commercial and custom-designed negative enrichment strategies to selectively deplete the most abundant rRNA reads from the host and non-target bacteria; host RNA was diminished from up to 40% of total reads to as low as 3%, and the total number of reads assigned to abundant bacterial classes were reduced greatly. Our treatment resulted in up to a 700-fold increase in the number of viral reads, detection of a greater number of viral agents, and higher average genome coverage for pathogens. Depletion assays added only 2 h to the NGS library preparation workflow. Custom depletion probe design offered significant cost savings (US$7-12 per sample) compared to commercial kits (US$30-50 per sample).
MeSH term(s)	Animals ; Genomics ; High-Throughput Nucleotide Sequencing/veterinary ; Poultry ; RNA ; RNA Viruses
Chemical Substances	RNA (63231-63-0)
Language	English
Publishing date	2022-07-05
Publishing country	United States
Document type	Journal Article
ZDB-ID	287603-6
ISSN	1943-4936 ; 1040-6387
ISSN (online)	1943-4936
ISSN	1040-6387
DOI	10.1177/10406387221102430
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Article: Protection against Different Genotypes of Newcastle Disease Viruses (NDV) Afforded by an Adenovirus-Vectored Fusion Protein and Live NDV Vaccines in Chickens.

Ferreira, Helena L / Miller, Patti J / Suarez, David L

Vaccines

2021 Volume 9, Issue 2

Abstract: The efficacy of an adenovirus-vectored Newcastle disease virus (NDV) vaccine expressing the fusion (F) NDV protein (adeno-F) was evaluated against challenges with virulent heterologous and homologous NDV strains to the F protein. In a preliminary study, ... ...

Abstract	The efficacy of an adenovirus-vectored Newcastle disease virus (NDV) vaccine expressing the fusion (F) NDV protein (adeno-F) was evaluated against challenges with virulent heterologous and homologous NDV strains to the F protein. In a preliminary study, two different doses (low and high) of adeno-F were tested against a virulent NDV strain containing the homologous NDV F protein, CA02. In a second study, at three weeks post-vaccination, the efficacy of the high dose of adeno-F was compared to a live attenuated NDV vaccine strain (LaSota) against three antigenically distinct virulent NDV challenge strains, one homologous (CA02) and two heterologous (TZ12, EG14) to F in the vectored vaccine. In both experiments, clinical signs, mortality, virus shedding, and humoral response were evaluated. In the first experiment, the survival rates from birds vaccinated with adeno-F at a high and low dose were 100% and 25%, respectively. In the second experiment, birds vaccinated with the high dose of adeno-F had a survival rate of 80%, 75%, and 65% after challenge with the CA02, TZ12, and EG14 viruses, respectively. All of the LaSota-vaccinated birds survived post-challenge no matter the NDV challenge strain. High antibody titers were detected after vaccination with LaSota by HI and ELISA tests. The majority of adeno-F-vaccinated birds had detectable antibodies using the ELISA test, but not using the HI test, before the challenge. The data show that both the similarity of the F protein of the adeno-F vaccine to the challenge virus and the adeno-F vaccination dose affect the efficacy of an adenovirus-vectored NDV vaccine against a virulent NDV challenge.
Language	English
Publishing date	2021-02-21
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2703319-3
ISSN	2076-393X
ISSN	2076-393X
DOI	10.3390/vaccines9020182
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Article ; Online: Unraveling frontiers in poultry health (part 1) - Mitigating economically important viral and bacterial diseases in commercial Chicken and Turkey production.

Fasina, Yewande O / Suarez, David L / Ritter, George D / Gerken, Elise C / Farnell, Yuhua Z / Wolfenden, Ross / Hargis, Billy

Poultry science

2024 Volume 103, Issue 4, Page(s) 103500

Abstract: This symposium offered up-to-date perspectives on field experiences and the latest research on significant viral and bacterial diseases affecting poultry. A highlight was the discussion on the use of enteroids as advanced in vitro models for exploring ... ...

Abstract	This symposium offered up-to-date perspectives on field experiences and the latest research on significant viral and bacterial diseases affecting poultry. A highlight was the discussion on the use of enteroids as advanced in vitro models for exploring disease pathogenesis. Outcomes of this symposium included identifying the urgent need to improve the prevention and control of avian influenza by focusing research on vaccine effectiveness. In this regard, efforts should focus on enhancing the relatedness of vaccine antigen to the field (challenge) virus strain and improving immunogenicity. It was also revealed that gangrenous dermatitis could be controlled through withholding or restricting the administration of ionophores during broiler life cycle, and that administration of microscopic polymer beads (gel) based-live coccidia vaccines to chicks could be used to reduce necrotic enteritis-induced mortality. It was emphasized that effective diagnosis of re-emerging Turkey diseases (such as blackhead, fowl cholera, and coccidiosis) and emerging Turkey diseases such as reoviral hepatitis, reoviral arthritis, Ornithobacterium rhinotracheale infection, and strepticemia require complementarity between investigative research approaches and production Veterinarian field approaches. Lastly, it was determined that the development of a variety of functionally-specific enteroids would expedite the delineation of enteric pathogen mechanisms and the identification of novel vaccine adjuvants.
MeSH term(s)	Animals ; Chickens ; Poultry ; Bacterial Infections/veterinary ; Influenza in Birds/prevention & control ; Poultry Diseases/microbiology
Language	English
Publishing date	2024-02-07
Publishing country	England
Document type	Journal Article
ZDB-ID	242586-5
ISSN	1525-3171 ; 0032-5791
ISSN (online)	1525-3171
ISSN	0032-5791
DOI	10.1016/j.psj.2024.103500
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Article ; Online: SARS-CoV-2 utilization of ACE2 from different bat species allows for virus entry and replication in vitro.

Briggs, Kelsey / Sweeney, Ryan / Blehert, David S / Spackman, Erica / Suarez, David L / Kapczynski, Darrell R

Virology

2023 Volume 586, Page(s) 122–129

Abstract: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is believed to have a zoonotic origin with bats suspected as a natural host. In this work, we individually express the ACE2 of seven bat species including, little brown, great roundleaf, ... ...

Abstract	Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is believed to have a zoonotic origin with bats suspected as a natural host. In this work, we individually express the ACE2 of seven bat species including, little brown, great roundleaf, Pearson's horseshoe, greater horseshoe, Brazilian free-tailed, Egyptian rousette, and Chinese rufous horseshoe in DF1 cells and determine their ability to support attachment and replication of SARS-CoV-2 viruses. We demonstrate that the ACE2 receptor of all seven species made DF1 cells permissible to SARS-CoV-2. The level of virus replication differed between bat species and variants tested. The Wuhan lineage SARS-CoV-2 virus replicated to higher titers than either variant virus tested. All viruses tested grew to higher titers in cells expressing the human ACE2 gene compared to a bat ACE2. This study provides a practical in vitromethod for further testing of animal species for potential susceptibility to current and emerging SARS-CoV-2 viruses.
MeSH term(s)	Animals ; Humans ; SARS-CoV-2/genetics ; Chiroptera ; Angiotensin-Converting Enzyme 2/genetics ; COVID-19 ; Receptors, Virus/genetics ; Virus Internalization ; Spike Glycoprotein, Coronavirus/genetics
Chemical Substances	Angiotensin-Converting Enzyme 2 (EC 3.4.17.23) ; Receptors, Virus ; Spike Glycoprotein, Coronavirus ; spike protein, SARS-CoV-2
Language	English
Publishing date	2023-07-05
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, P.H.S. ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, N.I.H., Extramural
ZDB-ID	200425-2
ISSN	1096-0341 ; 0042-6822
ISSN (online)	1096-0341
ISSN	0042-6822
DOI	10.1016/j.virol.2023.07.002
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Article ; Online: Development of an in vitro model for animal species susceptibility to SARS-CoV-2 replication based on expression of ACE2 and TMPRSS2 in avian cells

Kapczynski, Darrell R. / Sweeney, Ryan / Spackman, Erica / Pantin-Jackwood, Mary / Suarez, David L.

Virology. 2022 Apr., v. 569 p.1-12

2022

Abstract: The SARS-CoV-2 (SARS-CoV-2) virus has caused a worldwide pandemic because of the virus's ability to transmit efficiently human-to-human. A key determinant of infection is the attachment of the viral spike protein to the host receptor angiotensin- ... ...

Abstract	The SARS-CoV-2 (SARS-CoV-2) virus has caused a worldwide pandemic because of the virus's ability to transmit efficiently human-to-human. A key determinant of infection is the attachment of the viral spike protein to the host receptor angiotensin-converting enzyme 2 (ACE2). Because of the presumed zoonotic origin of SARS-CoV-2, there is no practical way to assess the susceptibility of every species to SARS-CoV-2 by direct challenge studies. In an effort to have a better predictive model of animal host susceptibility to SARS-CoV-2, we expressed the ACE2 and/or transmembrane serine protease 2 (TMPRSS2) genes from humans and other animal species in the avian fibroblast cell line, DF1, that is not permissive to infection. We demonstrated that expression of both human ACE2 and TMPRSS2 genes is necessary to support SARS-CoV-2 infection and replication in DF1 and a non-permissive sub-lineage of MDCK cells. Titers of SARS-CoV-2 in these cell lines were comparable to those observed in control Vero cells. To further test the model, we developed seven additional transgenic cell lines expressing the ACE2 and TMPRSS2 derived from Felis catus (cat), Equus caballus (horse), Sus domesticus (pig), Capra hircus (goat), Mesocricetus auratus (Golden hamster), Myotis lucifugus (Little Brown bat) and Hipposideros armiger (Great Roundleaf bat) in DF1 cells. Results demonstrate permissive replication of SARS-CoV-2 in cat, Golden hamster, and goat species, but not pig or horse, which correlated with the results of reported challenge studies. Cells expressing genes from either bat species tested demonstrated temporal replication of SARS-CoV-2 that peaked early and was not sustained. The development of this cell culture model allows for more efficient testing of the potential susceptibility of many different animal species for SARS-CoV-2 and emerging variant viruses.
Keywords	Capra hircus ; Hipposideros ; Mesocricetus auratus ; Myotis lucifugus ; Severe acute respiratory syndrome coronavirus 2 ; birds ; cats ; cell culture ; cell lines ; fibroblasts ; genetically modified organisms ; goats ; horses ; humans ; models ; pandemic ; peptidyl-dipeptidase A ; serine proteinases ; swine ; virology ; viruses ; SARS-CoV-2 ; ACE2 ; TMPRSS2 ; Animal ; Replication ; Model
Language	English
Dates of publication	2022-04
Size	p. 1-12.
Publishing place	Elsevier Inc.
Document type	Article ; Online
Note	Use and reproduction
ZDB-ID	200425-2
ISSN	1096-0341 ; 0042-6822
ISSN (online)	1096-0341
ISSN	0042-6822
DOI	10.1016/j.virol.2022.01.014
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Article ; Online: The Multifaceted Zoonotic Risk of H9N2 Avian Influenza.

Pusch, Elizabeth A / Suarez, David L

Veterinary sciences

2018 Volume 5, Issue 4

Abstract: Poultry-adapted H9N2 avian influenza viruses (AIVs) are commonly found in many countries in Asia, the Middle East, Africa, and Europe, and although classified as low pathogenic viruses, they are an economically important disease. Besides the importance ... ...

Abstract	Poultry-adapted H9N2 avian influenza viruses (AIVs) are commonly found in many countries in Asia, the Middle East, Africa, and Europe, and although classified as low pathogenic viruses, they are an economically important disease. Besides the importance of the disease in the poultry industry, some H9N2 AIVs are also known to be zoonotic. The disease in humans appears to cause primarily a mild upper respiratory disease, and doesn't cause or only rarely causes the severe pneumonia often seen with other zoonotic AIVs like H5N1 or H7N9. Serologic studies in humans, particularly in occupationally exposed workers, show a large number of people with antibodies to H9N2, suggesting infection is commonly occurring. Of the four defined H9N2 poultry lineages, only two lineages, the G1 and the Y280 lineages, are associated with human infections. Almost all of the viruses from humans have a leucine at position 226 (H3 numbering) of the hemagglutinin associated with a higher affinity of binding with α2,6 sialic acid, the host cell receptor most commonly found on glycoproteins in the human upper respiratory tract. For unknown reasons there has also been a shift in recent years of poultry viruses in the G1 and Y280 lineages to also having leucine instead of glutamine, the amino acid found in most avian viruses, at position 226. The G1 and Y280 poultry lineages because of their known ability to infect humans, the high prevalence of the virus in poultry in endemic countries, the lack of antibody in most humans, and the shift of poultry viruses to more human-like receptor binding makes these viruses a human pandemic threat. Increased efforts for control of the virus, including through effective vaccine use in poultry, is warranted for both poultry and public health goals.
Language	English
Publishing date	2018-09-21
Publishing country	Switzerland
Document type	Journal Article ; Review
ZDB-ID	2768971-2
ISSN	2306-7381 ; 2306-7381
ISSN (online)	2306-7381
ISSN	2306-7381
DOI	10.3390/vetsci5040082
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Article ; Online: Development of an in vitro model for animal species susceptibility to SARS-CoV-2 replication based on expression of ACE2 and TMPRSS2 in avian cells.

Kapczynski, Darrell R / Sweeney, Ryan / Spackman, Erica / Pantin-Jackwood, Mary / Suarez, David L

Virology

2022 Volume 569, Page(s) 1–12

Abstract	The SARS-CoV-2 (SARS-CoV-2) virus has caused a worldwide pandemic because of the virus's ability to transmit efficiently human-to-human. A key determinant of infection is the attachment of the viral spike protein to the host receptor angiotensin-converting enzyme 2 (ACE2). Because of the presumed zoonotic origin of SARS-CoV-2, there is no practical way to assess the susceptibility of every species to SARS-CoV-2 by direct challenge studies. In an effort to have a better predictive model of animal host susceptibility to SARS-CoV-2, we expressed the ACE2 and/or transmembrane serine protease 2 (TMPRSS2) genes from humans and other animal species in the avian fibroblast cell line, DF1, that is not permissive to infection. We demonstrated that expression of both human ACE2 and TMPRSS2 genes is necessary to support SARS-CoV-2 infection and replication in DF1 and a non-permissive sub-lineage of MDCK cells. Titers of SARS-CoV-2 in these cell lines were comparable to those observed in control Vero cells. To further test the model, we developed seven additional transgenic cell lines expressing the ACE2 and TMPRSS2 derived from Felis catus (cat), Equus caballus (horse), Sus domesticus (pig), Capra hircus (goat), Mesocricetus auratus (Golden hamster), Myotis lucifugus (Little Brown bat) and Hipposideros armiger (Great Roundleaf bat) in DF1 cells. Results demonstrate permissive replication of SARS-CoV-2 in cat, Golden hamster, and goat species, but not pig or horse, which correlated with the results of reported challenge studies. Cells expressing genes from either bat species tested demonstrated temporal replication of SARS-CoV-2 that peaked early and was not sustained. The development of this cell culture model allows for more efficient testing of the potential susceptibility of many different animal species for SARS-CoV-2 and emerging variant viruses.
MeSH term(s)	Angiotensin-Converting Enzyme 2/genetics ; Animals ; COVID-19 ; Cats ; Chiroptera/metabolism ; Chlorocebus aethiops ; Horses ; SARS-CoV-2/genetics ; Spike Glycoprotein, Coronavirus/genetics ; Spike Glycoprotein, Coronavirus/metabolism ; Swine ; Vero Cells
Chemical Substances	Spike Glycoprotein, Coronavirus ; spike protein, SARS-CoV-2 ; Angiotensin-Converting Enzyme 2 (EC 3.4.17.23)
Language	English
Publishing date	2022-02-12
Publishing country	United States
Document type	Journal Article ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, U.S. Gov't, P.H.S.
ZDB-ID	200425-2
ISSN	1096-0341 ; 0042-6822
ISSN (online)	1096-0341
ISSN	0042-6822
DOI	10.1016/j.virol.2022.01.014
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