Babesia bovis biological clones and the inter-strain allelic diversity of the Bv80 gene support subpopulation selection as a mechanism involved in the attenuation of two virulent i...

Autores
Baravalle, María Eugenia; Thompson, Carolina Soledad; Valentini, Beatriz Susana; Ferreira, Mariano B.; Torioni, Susana Marta; Florin-Christensen, Mónica; Echaide, Ignacio Eduardo
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The virulence phenotype of Babesia bovis subpopulations was evaluated using biological clones derived from the high-virulence BboS2P and the low-virulence BboR1A strain and two original virulent isolates, BboL15 and BboL17, multiplied extensively in vitro or attenuated by successive passages in splenectomized calves. The virulence phenotype was assessed both by inoculation of normal Holstein adult steers and by analyses of polymorphic fragments of the single-copy Bv80 gene as a subpopulation marker. BboS2P and its nine derived clones contained a single 750 bp fragment with identical nucleotide sequences and numbers of repeats. A single fragment of approximately 850 bp was observed in BboR1A and its derived clones (Ca3B1, Ca2B1). Ca3B1 and Ca2B1 were differentiated by a stable deletion of 15 contiguous nucleotides in the Bv80 allele of Ca3B1. Both alleles were identified in the parental strain. Original isolates BboL15 and BboL17 contained two Bv80 fragments of different sizes. Interestingly, the heavy and light fragments persisted in the in vivo-attenuated strains and the virulent in vitro-multiplied strains, respectively. Despite the inter-strain allelic diversity of the Bv80 gene, the fragments had identical nucleotide sequences and numbers of repeats compared to their respective parental Bv80 genes. The high-virulence and low-virulence phenotypes remained unchanged after they were multiplied in vitro. In conclusion, the polymorphic B. bovis Bv80 gene, was a useful marker for differentiating subpopulations with different phenotypes. The brevity of the procedure to isolate one parasite from the original isolate or strain before in vitro cloning and the fact that the continuous in vitro multiplication did not modify the virulence phenotype of B. bovis clones strongly suggest that the in vivo-attenuated subpopulations existed in the original isolates before they were selected by passages in splenectomized calves.
EEA Rafaela
Fil: Baravalle, María Eugenia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Thompson, Carolina Soledad. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Valentini, Beatriz Susana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Ferreira, Mariano B. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Torioni, Susana Marta. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Florin-Christensen, Mónica. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Echaide, Ignacio Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fuente
Veterinary Parasitology 190 (3–4) : 391-400 (December 2012)
Materia
Babesia bovis
Virulencia
Clones
Genética
Enfermedades de los Animales
Ternero
Virulence
Genetics
Animal Diseases
Calves
Bv80
Nivel de accesibilidad
acceso restringido
Condiciones de uso
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/4284
Acceder
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oai_identifier_str oai:localhost:20.500.12123/4284
network_acronym_str INTADig
repository_id_str l
network_name_str INTA Digital (INTA)
spelling Babesia bovis biological clones and the inter-strain allelic diversity of the Bv80 gene support subpopulation selection as a mechanism involved in the attenuation of two virulent isolatesBaravalle, María EugeniaThompson, Carolina SoledadValentini, Beatriz SusanaFerreira, Mariano B.Torioni, Susana MartaFlorin-Christensen, MónicaEchaide, Ignacio EduardoBabesia bovisVirulenciaClonesGenéticaEnfermedades de los AnimalesTerneroVirulenceGeneticsAnimal DiseasesCalvesBv80The virulence phenotype of Babesia bovis subpopulations was evaluated using biological clones derived from the high-virulence BboS2P and the low-virulence BboR1A strain and two original virulent isolates, BboL15 and BboL17, multiplied extensively in vitro or attenuated by successive passages in splenectomized calves. The virulence phenotype was assessed both by inoculation of normal Holstein adult steers and by analyses of polymorphic fragments of the single-copy Bv80 gene as a subpopulation marker. BboS2P and its nine derived clones contained a single 750 bp fragment with identical nucleotide sequences and numbers of repeats. A single fragment of approximately 850 bp was observed in BboR1A and its derived clones (Ca3B1, Ca2B1). Ca3B1 and Ca2B1 were differentiated by a stable deletion of 15 contiguous nucleotides in the Bv80 allele of Ca3B1. Both alleles were identified in the parental strain. Original isolates BboL15 and BboL17 contained two Bv80 fragments of different sizes. Interestingly, the heavy and light fragments persisted in the in vivo-attenuated strains and the virulent in vitro-multiplied strains, respectively. Despite the inter-strain allelic diversity of the Bv80 gene, the fragments had identical nucleotide sequences and numbers of repeats compared to their respective parental Bv80 genes. The high-virulence and low-virulence phenotypes remained unchanged after they were multiplied in vitro. In conclusion, the polymorphic B. bovis Bv80 gene, was a useful marker for differentiating subpopulations with different phenotypes. The brevity of the procedure to isolate one parasite from the original isolate or strain before in vitro cloning and the fact that the continuous in vitro multiplication did not modify the virulence phenotype of B. bovis clones strongly suggest that the in vivo-attenuated subpopulations existed in the original isolates before they were selected by passages in splenectomized calves.EEA RafaelaFil: Baravalle, María Eugenia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaFil: Thompson, Carolina Soledad. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaFil: Valentini, Beatriz Susana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaFil: Ferreira, Mariano B. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaFil: Torioni, Susana Marta. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaFil: Florin-Christensen, Mónica. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Echaide, Ignacio Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaElsevier2019-01-17T14:33:09Z2019-01-17T14:33:09Z2012-12-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttps://www.sciencedirect.com/science/article/pii/S0304401712003512http://hdl.handle.net/20.500.12123/42840304-4017https://doi.org/10.1016/j.vetpar.2012.06.037Veterinary Parasitology 190 (3–4) : 391-400 (December 2012)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccess2025-10-23T11:16:47Zoai:localhost:20.500.12123/4284instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-10-23 11:16:48.344INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Babesia bovis biological clones and the inter-strain allelic diversity of the Bv80 gene support subpopulation selection as a mechanism involved in the attenuation of two virulent isolates
title Babesia bovis biological clones and the inter-strain allelic diversity of the Bv80 gene support subpopulation selection as a mechanism involved in the attenuation of two virulent isolates
spellingShingle Babesia bovis biological clones and the inter-strain allelic diversity of the Bv80 gene support subpopulation selection as a mechanism involved in the attenuation of two virulent isolates
Baravalle, María Eugenia
Babesia bovis
Virulencia
Clones
Genética
Enfermedades de los Animales
Ternero
Virulence
Genetics
Animal Diseases
Calves
Bv80
title_short Babesia bovis biological clones and the inter-strain allelic diversity of the Bv80 gene support subpopulation selection as a mechanism involved in the attenuation of two virulent isolates
title_full Babesia bovis biological clones and the inter-strain allelic diversity of the Bv80 gene support subpopulation selection as a mechanism involved in the attenuation of two virulent isolates
title_fullStr Babesia bovis biological clones and the inter-strain allelic diversity of the Bv80 gene support subpopulation selection as a mechanism involved in the attenuation of two virulent isolates
title_full_unstemmed Babesia bovis biological clones and the inter-strain allelic diversity of the Bv80 gene support subpopulation selection as a mechanism involved in the attenuation of two virulent isolates
title_sort Babesia bovis biological clones and the inter-strain allelic diversity of the Bv80 gene support subpopulation selection as a mechanism involved in the attenuation of two virulent isolates
dc.creator.none.fl_str_mv Baravalle, María Eugenia
Thompson, Carolina Soledad
Valentini, Beatriz Susana
Ferreira, Mariano B.
Torioni, Susana Marta
Florin-Christensen, Mónica
Echaide, Ignacio Eduardo
author Baravalle, María Eugenia
author_facet Baravalle, María Eugenia
Thompson, Carolina Soledad
Valentini, Beatriz Susana
Ferreira, Mariano B.
Torioni, Susana Marta
Florin-Christensen, Mónica
Echaide, Ignacio Eduardo
author_role author
author2 Thompson, Carolina Soledad
Valentini, Beatriz Susana
Ferreira, Mariano B.
Torioni, Susana Marta
Florin-Christensen, Mónica
Echaide, Ignacio Eduardo
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Babesia bovis
Virulencia
Clones
Genética
Enfermedades de los Animales
Ternero
Virulence
Genetics
Animal Diseases
Calves
Bv80
topic Babesia bovis
Virulencia
Clones
Genética
Enfermedades de los Animales
Ternero
Virulence
Genetics
Animal Diseases
Calves
Bv80
dc.description.none.fl_txt_mv The virulence phenotype of Babesia bovis subpopulations was evaluated using biological clones derived from the high-virulence BboS2P and the low-virulence BboR1A strain and two original virulent isolates, BboL15 and BboL17, multiplied extensively in vitro or attenuated by successive passages in splenectomized calves. The virulence phenotype was assessed both by inoculation of normal Holstein adult steers and by analyses of polymorphic fragments of the single-copy Bv80 gene as a subpopulation marker. BboS2P and its nine derived clones contained a single 750 bp fragment with identical nucleotide sequences and numbers of repeats. A single fragment of approximately 850 bp was observed in BboR1A and its derived clones (Ca3B1, Ca2B1). Ca3B1 and Ca2B1 were differentiated by a stable deletion of 15 contiguous nucleotides in the Bv80 allele of Ca3B1. Both alleles were identified in the parental strain. Original isolates BboL15 and BboL17 contained two Bv80 fragments of different sizes. Interestingly, the heavy and light fragments persisted in the in vivo-attenuated strains and the virulent in vitro-multiplied strains, respectively. Despite the inter-strain allelic diversity of the Bv80 gene, the fragments had identical nucleotide sequences and numbers of repeats compared to their respective parental Bv80 genes. The high-virulence and low-virulence phenotypes remained unchanged after they were multiplied in vitro. In conclusion, the polymorphic B. bovis Bv80 gene, was a useful marker for differentiating subpopulations with different phenotypes. The brevity of the procedure to isolate one parasite from the original isolate or strain before in vitro cloning and the fact that the continuous in vitro multiplication did not modify the virulence phenotype of B. bovis clones strongly suggest that the in vivo-attenuated subpopulations existed in the original isolates before they were selected by passages in splenectomized calves.
EEA Rafaela
Fil: Baravalle, María Eugenia. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Thompson, Carolina Soledad. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Valentini, Beatriz Susana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Ferreira, Mariano B. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Torioni, Susana Marta. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Florin-Christensen, Mónica. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Echaide, Ignacio Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
description The virulence phenotype of Babesia bovis subpopulations was evaluated using biological clones derived from the high-virulence BboS2P and the low-virulence BboR1A strain and two original virulent isolates, BboL15 and BboL17, multiplied extensively in vitro or attenuated by successive passages in splenectomized calves. The virulence phenotype was assessed both by inoculation of normal Holstein adult steers and by analyses of polymorphic fragments of the single-copy Bv80 gene as a subpopulation marker. BboS2P and its nine derived clones contained a single 750 bp fragment with identical nucleotide sequences and numbers of repeats. A single fragment of approximately 850 bp was observed in BboR1A and its derived clones (Ca3B1, Ca2B1). Ca3B1 and Ca2B1 were differentiated by a stable deletion of 15 contiguous nucleotides in the Bv80 allele of Ca3B1. Both alleles were identified in the parental strain. Original isolates BboL15 and BboL17 contained two Bv80 fragments of different sizes. Interestingly, the heavy and light fragments persisted in the in vivo-attenuated strains and the virulent in vitro-multiplied strains, respectively. Despite the inter-strain allelic diversity of the Bv80 gene, the fragments had identical nucleotide sequences and numbers of repeats compared to their respective parental Bv80 genes. The high-virulence and low-virulence phenotypes remained unchanged after they were multiplied in vitro. In conclusion, the polymorphic B. bovis Bv80 gene, was a useful marker for differentiating subpopulations with different phenotypes. The brevity of the procedure to isolate one parasite from the original isolate or strain before in vitro cloning and the fact that the continuous in vitro multiplication did not modify the virulence phenotype of B. bovis clones strongly suggest that the in vivo-attenuated subpopulations existed in the original isolates before they were selected by passages in splenectomized calves.
publishDate 2012
dc.date.none.fl_str_mv 2012-12-21
2019-01-17T14:33:09Z
2019-01-17T14:33:09Z
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://www.sciencedirect.com/science/article/pii/S0304401712003512
http://hdl.handle.net/20.500.12123/4284
0304-4017
https://doi.org/10.1016/j.vetpar.2012.06.037
url https://www.sciencedirect.com/science/article/pii/S0304401712003512
http://hdl.handle.net/20.500.12123/4284
https://doi.org/10.1016/j.vetpar.2012.06.037
identifier_str_mv 0304-4017
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
eu_rights_str_mv restrictedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv Veterinary Parasitology 190 (3–4) : 391-400 (December 2012)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 12.982451

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