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Biblioteca (s) : |
INIA Las Brujas. |
Fecha : |
05/12/2016 |
Actualizado : |
07/12/2018 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
CARLSON, J. S.; GIANNITTI, F.; VALKIÜNAS, G.; TELL, L. A.; SNIPES, J.; WRIGHT, S.; CORNEL, A. J. |
Afiliación : |
JENNY S. CARLSON, Mosquito Control Research Laboratory, Department of Entomology and Nematology, Kearney Agriculture Center, University of California; FEDERICO GIANNITTI, University of Minnesota, Saint Paul, MN, USA; INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; University of California, Davis, CA, USA; GEDIMINAS VALKIÜNAS, Nature Research Centre, Akademijos 2; LISA A. TELL, Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California; JOY SNIPES, Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California; STAN WRIGHT, Sacramento-Yolo Mosquito Vector and Control District; ANTHONY J. CORNEL, Mosquito Control Research Laboratory, Department of Entomology and Nematology, Kearney Agriculture Center, University of California; Vector Genetics Laboratory, Department of Pathology, Microbiology and Immunology, University of California. |
Título : |
A method to preserve low parasitaemia Plasmodium-infected avian blood for host and vector infectivity assays. |
Complemento del título : |
Methodology. |
Fecha de publicación : |
2016 |
Fuente / Imprenta : |
Malaria Journal, 2016, v.15 (5): Article number 1198. OPEN ACCESS |
ISSN : |
1475-2875 |
DOI : |
10.1186/s12936-016-1198-5 |
Idioma : |
Inglés |
Notas : |
Article history: Received 08 July 2015 // Accepted 01 March 2016 //First Online 11 March 2016. |
Contenido : |
ABSTRACT.
Background: Avian malaria vector competence studies are needed to understand more succinctly complex avian parasite-vector-relations. The lack of vector competence trials may be attributed to the difficulty of obtaining gametocytes for the majority of Plasmodium species and lineages. To conduct avian malaria infectivity assays for those Plasmodium spp. and lineages that are refractory to in vitro cultivation, it is necessary to obtain and preserve for short periods sufficient viable merozoites to infect naïve donor birds to be used as gametocyte donors to infect mosquitoes. Currently, there is only one described method for long-term storage of Plasmodium spp. - infected wild avian blood and it is reliable at a parasitaemia of at least 1 %. However, most naturally infected wild-caught birds have a parasitaemia of much less that 1 %. To address this problem, a method for short-term storage of infected wild avian blood with low parasitaemia (even ?0.0005 %) has been explored and validated. Methods: To obtain viable infective merozoites, blood was collected from wild birds using a syringe containing the anticoagulant and the red blood cell preservative citrate phosphate dextrose adenine solution (CPDA). Each blood sample was stored at 4°C for up to 48 h providing sufficient time to determine the species and parasitaemia of Plasmodium spp. in the blood by morphological examination before injecting into donor canaries. Plasmodium spp. - infected blood was inoculated intravenously into canaries and once infection was established, Culex stigmatosoma, Cx. pipiens and Cx. quinquefasciatus mosquitoes were then allowed to feed on the infected canaries to validate the efficacy of this method for mosquito vector competence assays. Results: Storage of Plasmodium spp. - infected donor blood at 4°C yielded viable parasites for 48 h. All five experimentally-infected canaries developed clinical signs and were infectious. Pathologic examination of three canaries that later died revealed splenic lesions typical of avian malaria infection. Mosquito infectivity assays demonstrated that Cx. stigmatosoma and Cx. pipiens were competent vectors for Plasmodium cathemerium. Conclusions: A simple method of collecting and preserving avian whole blood with malaria parasites of low parasitaemia (?0.0005 %) was developed that remained viable for further experimental bird and mosquito infectivity assays. This method allows researchers interested in conducting infectivity assays on target Plasmodium spp. to collect these parasites directly from nature with minimal impact on wild birds.
© 2016 Carlson et al. MenosABSTRACT.
Background: Avian malaria vector competence studies are needed to understand more succinctly complex avian parasite-vector-relations. The lack of vector competence trials may be attributed to the difficulty of obtaining gametocytes for the majority of Plasmodium species and lineages. To conduct avian malaria infectivity assays for those Plasmodium spp. and lineages that are refractory to in vitro cultivation, it is necessary to obtain and preserve for short periods sufficient viable merozoites to infect naïve donor birds to be used as gametocyte donors to infect mosquitoes. Currently, there is only one described method for long-term storage of Plasmodium spp. - infected wild avian blood and it is reliable at a parasitaemia of at least 1 %. However, most naturally infected wild-caught birds have a parasitaemia of much less that 1 %. To address this problem, a method for short-term storage of infected wild avian blood with low parasitaemia (even ?0.0005 %) has been explored and validated. Methods: To obtain viable infective merozoites, blood was collected from wild birds using a syringe containing the anticoagulant and the red blood cell preservative citrate phosphate dextrose adenine solution (CPDA). Each blood sample was stored at 4°C for up to 48 h providing sufficient time to determine the species and parasitaemia of Plasmodium spp. in the blood by morphological examination before injecting into donor canaries. Plasmodium spp. - infected blood was inoculated int... Presentar Todo |
Palabras claves : |
ANIMAL EXPERIMENT; AVIAN MALARIA; BIRD INOCULATION; BLOOD PRESERVATION; CULEX spp. VECTORS; EXPERIMENTAL INFECTION; PATHOLOGY; PLASMODIUM CATHEMERIUM. |
Thesagro : |
MODELOS ANIMALES. |
Asunto categoría : |
-- |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/12151/1/s12936-016-1198-5.pdf
https://malariajournal.biomedcentral.com/articles/10.1186/s12936-016-1198-5
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Marc : |
LEADER 03718naa a2200337 a 4500 001 1056201 005 2018-12-07 008 2016 bl uuuu u00u1 u #d 022 $a1475-2875 024 7 $a10.1186/s12936-016-1198-5$2DOI 100 1 $aCARLSON, J. S. 245 $aA method to preserve low parasitaemia Plasmodium-infected avian blood for host and vector infectivity assays.$h[electronic resource] 260 $c2016 500 $aArticle history: Received 08 July 2015 // Accepted 01 March 2016 //First Online 11 March 2016. 520 $aABSTRACT. Background: Avian malaria vector competence studies are needed to understand more succinctly complex avian parasite-vector-relations. The lack of vector competence trials may be attributed to the difficulty of obtaining gametocytes for the majority of Plasmodium species and lineages. To conduct avian malaria infectivity assays for those Plasmodium spp. and lineages that are refractory to in vitro cultivation, it is necessary to obtain and preserve for short periods sufficient viable merozoites to infect naïve donor birds to be used as gametocyte donors to infect mosquitoes. Currently, there is only one described method for long-term storage of Plasmodium spp. - infected wild avian blood and it is reliable at a parasitaemia of at least 1 %. However, most naturally infected wild-caught birds have a parasitaemia of much less that 1 %. To address this problem, a method for short-term storage of infected wild avian blood with low parasitaemia (even ?0.0005 %) has been explored and validated. Methods: To obtain viable infective merozoites, blood was collected from wild birds using a syringe containing the anticoagulant and the red blood cell preservative citrate phosphate dextrose adenine solution (CPDA). Each blood sample was stored at 4°C for up to 48 h providing sufficient time to determine the species and parasitaemia of Plasmodium spp. in the blood by morphological examination before injecting into donor canaries. Plasmodium spp. - infected blood was inoculated intravenously into canaries and once infection was established, Culex stigmatosoma, Cx. pipiens and Cx. quinquefasciatus mosquitoes were then allowed to feed on the infected canaries to validate the efficacy of this method for mosquito vector competence assays. Results: Storage of Plasmodium spp. - infected donor blood at 4°C yielded viable parasites for 48 h. All five experimentally-infected canaries developed clinical signs and were infectious. Pathologic examination of three canaries that later died revealed splenic lesions typical of avian malaria infection. Mosquito infectivity assays demonstrated that Cx. stigmatosoma and Cx. pipiens were competent vectors for Plasmodium cathemerium. Conclusions: A simple method of collecting and preserving avian whole blood with malaria parasites of low parasitaemia (?0.0005 %) was developed that remained viable for further experimental bird and mosquito infectivity assays. This method allows researchers interested in conducting infectivity assays on target Plasmodium spp. to collect these parasites directly from nature with minimal impact on wild birds. © 2016 Carlson et al. 650 $aMODELOS ANIMALES 653 $aANIMAL EXPERIMENT 653 $aAVIAN MALARIA 653 $aBIRD INOCULATION 653 $aBLOOD PRESERVATION 653 $aCULEX spp. VECTORS 653 $aEXPERIMENTAL INFECTION 653 $aPATHOLOGY 653 $aPLASMODIUM CATHEMERIUM 700 1 $aGIANNITTI, F. 700 1 $aVALKIÜNAS, G. 700 1 $aTELL, L. A. 700 1 $aSNIPES, J. 700 1 $aWRIGHT, S. 700 1 $aCORNEL, A. J. 773 $tMalaria Journal, 2016$gv.15 (5): Article number 1198. OPEN ACCESS
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Registro original : |
INIA Las Brujas (LB) |
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Biblioteca (s) : |
INIA Las Brujas. |
Fecha actual : |
15/04/2021 |
Actualizado : |
15/04/2021 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
Internacional - -- |
Autor : |
COSTA, D.; LÉVESQUE, S.; KUMAR, N.; FRESIA, P.; FERRÉS, I.; LAWLEY, T. D.; IRAOLA, G. |
Afiliación : |
DANIELA COSTA, Microbial Genomics Laboratory, Institut Pasteur Montevideo, Montevideo, Uruguay; Sección Genética Evolutiva, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay; SIMON LÉVESQUE, Laboratoire de Santé Publique du Québec, Quebec City, Canada; NITIN KUMAR, Wellcome Sanger Institute, Hinxton, Cambridgeshire, UK; PABLO FRESIA, Unidad Mixta UMPI, Institut Pasteur Montevideo + INIA, Montevideo, Uruguay; IGNACIO FERRÉS, Microbial Genomics Laboratory, Institut Pasteur Montevideo, Montevideo, Uruguay; TREVOR D. LAWLEY, Wellcome Sanger Institute, Hinxton, Cambridgeshire, UK; GREGORIO IRAOLA, Microbial Genomics Laboratory, Institut Pasteur Montevideo, Montevideo, Uruguay; Wellcome Sanger Institute, Hinxton, Cambridgeshire, UK; Center for Integrative Biology, Universidad Mayor, Santiago de Chile, Chile. |
Título : |
Pangenome analysis reveals genetic isolation in Campylobacter hyointestinalis subspecies adapted to different mammalian hosts. |
Fecha de publicación : |
2021 |
Fuente / Imprenta : |
Scientific Reports, 2021, Volume 11, Issue 1, Article number 3431. OPEN ACCESS. Doi: https://doi.org/10.1038/s41598-021-82993-9 |
ISSN : |
2045-2322 |
DOI : |
10.1038/s41598-021-82993-9 |
Idioma : |
Inglés |
Notas : |
Article history: Received 12 February 2018; Accepted 24 January 2021; Published 09 February 2021. |
Contenido : |
ABSTRACT.
Campylobacter hyointestinalis is an emerging pathogen currently divided in two subspecies: C. hyointestinalis subsp. lawsonii which is predominantly recovered from pigs, and C. hyointestinalis subsp. hyointestinalis which can be found in a much wider range of mammalian hosts. Despite C. hyointestinalis being reported as an emerging pathogen, its evolutionary and host-associated diversification patterns are still vastly unexplored. For this reason, we generated whole-genome sequences of 13 C. hyointestinalis subsp. hyointestinalis strains and performed a comprehensive comparative analysis including publicly available C. hyointestinalis subsp. hyointestinalis and C. hyointestinalis subsp. lawsonii genomes, to gain insight into the genomic variation of these differentially-adapted subspecies. Both subspecies are distinct phylogenetic lineages which present an apparent barrier to homologous recombination, suggesting genetic isolation. This is further supported by accessory gene patterns that recapitulate the core genome phylogeny. Additionally, C. hyointestinalis subsp. hyointestinalis presents a bigger and more diverse accessory genome, which probably reflects its capacity to colonize different mammalian hosts unlike C. hyointestinalis subsp. lawsonii that is presumably host-restricted. This greater plasticity in the accessory genome of C. hyointestinalis subsp. hyointestinalis correlates to a higher incidence of genome-wide recombination events, that may be the underlying mechanism driving its diversification. Concordantly, both subspecies present distinct patterns of gene families involved in genome plasticity and DNA repair like CRISPR-associated proteins and restriction-modification systems. Together, our results provide an overview of the genetic mechanisms shaping the genomes of C. hyointestinalis subspecies, contributing to understand the biology of Campylobacter species that are increasingly recognized as emerging pathogens.
© 2021, The Author(s). MenosABSTRACT.
Campylobacter hyointestinalis is an emerging pathogen currently divided in two subspecies: C. hyointestinalis subsp. lawsonii which is predominantly recovered from pigs, and C. hyointestinalis subsp. hyointestinalis which can be found in a much wider range of mammalian hosts. Despite C. hyointestinalis being reported as an emerging pathogen, its evolutionary and host-associated diversification patterns are still vastly unexplored. For this reason, we generated whole-genome sequences of 13 C. hyointestinalis subsp. hyointestinalis strains and performed a comprehensive comparative analysis including publicly available C. hyointestinalis subsp. hyointestinalis and C. hyointestinalis subsp. lawsonii genomes, to gain insight into the genomic variation of these differentially-adapted subspecies. Both subspecies are distinct phylogenetic lineages which present an apparent barrier to homologous recombination, suggesting genetic isolation. This is further supported by accessory gene patterns that recapitulate the core genome phylogeny. Additionally, C. hyointestinalis subsp. hyointestinalis presents a bigger and more diverse accessory genome, which probably reflects its capacity to colonize different mammalian hosts unlike C. hyointestinalis subsp. lawsonii that is presumably host-restricted. This greater plasticity in the accessory genome of C. hyointestinalis subsp. hyointestinalis correlates to a higher incidence of genome-wide recombination events, that may be the under... Presentar Todo |
Palabras claves : |
Computational biology and bioinformatics; Evolution; Microbiology. |
Asunto categoría : |
A50 Investigación agraria |
URL : |
https://www.nature.com/articles/s41598-021-82993-9.pdf
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Marc : |
LEADER 02962naa a2200265 a 4500 001 1061986 005 2021-04-15 008 2021 bl uuuu u00u1 u #d 022 $a2045-2322 024 7 $a10.1038/s41598-021-82993-9$2DOI 100 1 $aCOSTA, D. 245 $aPangenome analysis reveals genetic isolation in Campylobacter hyointestinalis subspecies adapted to different mammalian hosts.$h[electronic resource] 260 $c2021 500 $aArticle history: Received 12 February 2018; Accepted 24 January 2021; Published 09 February 2021. 520 $aABSTRACT. Campylobacter hyointestinalis is an emerging pathogen currently divided in two subspecies: C. hyointestinalis subsp. lawsonii which is predominantly recovered from pigs, and C. hyointestinalis subsp. hyointestinalis which can be found in a much wider range of mammalian hosts. Despite C. hyointestinalis being reported as an emerging pathogen, its evolutionary and host-associated diversification patterns are still vastly unexplored. For this reason, we generated whole-genome sequences of 13 C. hyointestinalis subsp. hyointestinalis strains and performed a comprehensive comparative analysis including publicly available C. hyointestinalis subsp. hyointestinalis and C. hyointestinalis subsp. lawsonii genomes, to gain insight into the genomic variation of these differentially-adapted subspecies. Both subspecies are distinct phylogenetic lineages which present an apparent barrier to homologous recombination, suggesting genetic isolation. This is further supported by accessory gene patterns that recapitulate the core genome phylogeny. Additionally, C. hyointestinalis subsp. hyointestinalis presents a bigger and more diverse accessory genome, which probably reflects its capacity to colonize different mammalian hosts unlike C. hyointestinalis subsp. lawsonii that is presumably host-restricted. This greater plasticity in the accessory genome of C. hyointestinalis subsp. hyointestinalis correlates to a higher incidence of genome-wide recombination events, that may be the underlying mechanism driving its diversification. Concordantly, both subspecies present distinct patterns of gene families involved in genome plasticity and DNA repair like CRISPR-associated proteins and restriction-modification systems. Together, our results provide an overview of the genetic mechanisms shaping the genomes of C. hyointestinalis subspecies, contributing to understand the biology of Campylobacter species that are increasingly recognized as emerging pathogens. © 2021, The Author(s). 653 $aComputational biology and bioinformatics 653 $aEvolution 653 $aMicrobiology 700 1 $aLÉVESQUE, S. 700 1 $aKUMAR, N. 700 1 $aFRESIA, P. 700 1 $aFERRÉS, I. 700 1 $aLAWLEY, T. D. 700 1 $aIRAOLA, G. 773 $tScientific Reports, 2021, Volume 11, Issue 1, Article number 3431. OPEN ACCESS. Doi: https://doi.org/10.1038/s41598-021-82993-9
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