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Biblioteca (s) : |
INIA La Estanzuela. |
Fecha : |
21/02/2014 |
Actualizado : |
05/11/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
FRAGA, M.; FERNÁNDEZ, S.; CAJARVILLE, C.; MARTÍNEZ, M.; ABIN-CARRIQUIRY, J.A.; ZUNINO, P. |
Afiliación : |
MARTIN FRAGA COTELO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay./Departamento de Microbiología Instituto de Investigaciones Biológicas Clemente Estable Montevideo Uruguay. |
Título : |
In vitro modulation of rumen microbiota and fermentation by native microorganisms isolated from the rumen of a fed-exclusively-on-pasture bovine. |
Fecha de publicación : |
2015 |
Fuente / Imprenta : |
Annals of Microbiology, v. 65 n. 4, p. 2355-2362, 2015. |
Idioma : |
Inglés |
Notas : |
Article history: Received: 6 January 2015 /Accepted: 17 March 2015. |
Contenido : |
Abstract:
In order to increase productive yields, modulation of rumen fermentation has been a concern in economically relevant species. The ban of antibiotics has driven attention into alternative strategies to modulate ruminal fermentation. Among these, the use of probiotics appears as an interesting approach. The objective of this work was to assess the potential of native bacteria isolated from the rumen of a fed-on-template-pasture cow to modulate fermentation in vitro and to influence the microbiota structure. Seven native ruminal bacteria strains were used in an in vitro gas production experiment. Fermentation dynamics were evaluated, and volatile fatty acids (VFA) and methane were quantified by high-performance liquid chromatography (HPLC) and gas chromatography (GC), respectively. Microbiota structure was assessed by pyrosequencing and methanogens were quantified by quantitative PCR (qPCR). Added strains modulated fermentation dynamics and VFA synthesis. Neither the general structure of the fermenters microbiota, numbers of methanogenic microorganisms nor methane production were altered by added bacteria. However, addition of two strains reduced the volume of gas produced from soluble carbohydrates, while one of them reduced the ratio of gas production in this phase; this was supported by a VFA concentration diminution (4 h incubation) in almost every treatment. Gas produced by fermentation of non-soluble carbohydrates and its fermentation ratio were enhanced by several strains. Also, the abundances of Lachnospiraceae, Veillonellaceae, Rikenellaceae and Succinivibrionaceae were affected by strain supplementation. Modulation of fermentation by selected ruminal native bacteria was achieved, probably enhancing the fermentation of non-soluble carbohydrates. This study represents a new approach in the knowledge related to the use of probiotics in ruminants. MenosAbstract:
In order to increase productive yields, modulation of rumen fermentation has been a concern in economically relevant species. The ban of antibiotics has driven attention into alternative strategies to modulate ruminal fermentation. Among these, the use of probiotics appears as an interesting approach. The objective of this work was to assess the potential of native bacteria isolated from the rumen of a fed-on-template-pasture cow to modulate fermentation in vitro and to influence the microbiota structure. Seven native ruminal bacteria strains were used in an in vitro gas production experiment. Fermentation dynamics were evaluated, and volatile fatty acids (VFA) and methane were quantified by high-performance liquid chromatography (HPLC) and gas chromatography (GC), respectively. Microbiota structure was assessed by pyrosequencing and methanogens were quantified by quantitative PCR (qPCR). Added strains modulated fermentation dynamics and VFA synthesis. Neither the general structure of the fermenters microbiota, numbers of methanogenic microorganisms nor methane production were altered by added bacteria. However, addition of two strains reduced the volume of gas produced from soluble carbohydrates, while one of them reduced the ratio of gas production in this phase; this was supported by a VFA concentration diminution (4 h incubation) in almost every treatment. Gas produced by fermentation of non-soluble carbohydrates and its fermentation ratio were enhanced by seve... Presentar Todo |
Palabras claves : |
FERMENTATION MODULATION; IN VITRO GAS PRODUCTION; MICROBIOTA RUMINAL; NATIVE RUMINAL MICROORGANISMS; PROBIÓTICOS; PROBIOTICS; RUMEN MICROBIOTA. |
Thesagro : |
PRODUCCIÓN ANIMAL. |
Asunto categoría : |
-- |
Marc : |
LEADER 02838naa a2200289 a 4500 001 1049916 005 2019-11-05 008 2015 bl uuuu u00u1 u #d 100 1 $aFRAGA, M. 245 $aIn vitro modulation of rumen microbiota and fermentation by native microorganisms isolated from the rumen of a fed-exclusively-on-pasture bovine. 260 $c2015 500 $aArticle history: Received: 6 January 2015 /Accepted: 17 March 2015. 520 $aAbstract: In order to increase productive yields, modulation of rumen fermentation has been a concern in economically relevant species. The ban of antibiotics has driven attention into alternative strategies to modulate ruminal fermentation. Among these, the use of probiotics appears as an interesting approach. The objective of this work was to assess the potential of native bacteria isolated from the rumen of a fed-on-template-pasture cow to modulate fermentation in vitro and to influence the microbiota structure. Seven native ruminal bacteria strains were used in an in vitro gas production experiment. Fermentation dynamics were evaluated, and volatile fatty acids (VFA) and methane were quantified by high-performance liquid chromatography (HPLC) and gas chromatography (GC), respectively. Microbiota structure was assessed by pyrosequencing and methanogens were quantified by quantitative PCR (qPCR). Added strains modulated fermentation dynamics and VFA synthesis. Neither the general structure of the fermenters microbiota, numbers of methanogenic microorganisms nor methane production were altered by added bacteria. However, addition of two strains reduced the volume of gas produced from soluble carbohydrates, while one of them reduced the ratio of gas production in this phase; this was supported by a VFA concentration diminution (4 h incubation) in almost every treatment. Gas produced by fermentation of non-soluble carbohydrates and its fermentation ratio were enhanced by several strains. Also, the abundances of Lachnospiraceae, Veillonellaceae, Rikenellaceae and Succinivibrionaceae were affected by strain supplementation. Modulation of fermentation by selected ruminal native bacteria was achieved, probably enhancing the fermentation of non-soluble carbohydrates. This study represents a new approach in the knowledge related to the use of probiotics in ruminants. 650 $aPRODUCCIÓN ANIMAL 653 $aFERMENTATION MODULATION 653 $aIN VITRO GAS PRODUCTION 653 $aMICROBIOTA RUMINAL 653 $aNATIVE RUMINAL MICROORGANISMS 653 $aPROBIÓTICOS 653 $aPROBIOTICS 653 $aRUMEN MICROBIOTA 700 1 $aFERNÁNDEZ, S. 700 1 $aCAJARVILLE, C. 700 1 $aMARTÍNEZ, M. 700 1 $aABIN-CARRIQUIRY, J.A. 700 1 $aZUNINO, P. 773 $tAnnals of Microbiology$gv. 65 n. 4, p. 2355-2362, 2015.
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INIA La Estanzuela (LE) |
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Biblioteca (s) : |
INIA Las Brujas. |
Fecha actual : |
22/09/2022 |
Actualizado : |
22/09/2022 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
Internacional - -- |
Autor : |
UMPIÉRREZ , A.; ERNST, E.; CARDOZO, A.; TORRES, A.; FERNÁNDEZ, M.; FRAGA, M.; VIGNOLI, R.; BADO, I.; VIDAL, R.; ZUNINO, P. |
Afiliación : |
ANA UMPIÉRREZ, Departamento de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay; DÉBORAH ERNST, Departamento de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay.; ANDREA CARDOZO, Departamento de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay.; ALEXIA TORRES, Programa de Microbiología y Micología, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile.; MAGALÍ FERNÁNDEZ, Departamento de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay.; MARTIN FRAGA COTELO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; RAFAEL VIGNOLI, Departamento de Bacteriología y Virología, Instituto de Higiene, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.; INÉS BADO, Departamento de Bacteriología y Virología, Instituto de Higiene, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.; ROBERTO VIDAL, Programa de Microbiología y Micología, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile; Instituto Milenio de Inmunología e Inmunoterapia, Facultad de Medicina, Universidad de Chile, Santiago, Chile.; PABLO ZUNINO, Departamento de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay. |
Título : |
Non-O157 Shiga toxin-producing Escherichia coli with potential harmful profiles to humans are isolated from the faeces of calves in Uruguay. |
Fecha de publicación : |
2022 |
Fuente / Imprenta : |
Austral Journal of Veterinary Sciences, 2022, Vol. 54 Issue 2, p.45-53. doi: https://doi.org/10.4067/S0719-81322022000200045 |
Descripción física : |
SSN 0719-8132 (version on-line)
ISSN 0719-8000 (version print) |
ISSN : |
0719-8132 (print); e-ISSN 0719-8000 (electronic) |
DOI : |
10.4067/S0719-81322022000200045 |
Idioma : |
Inglés |
Notas : |
Article history: Received 12 October 2021; Accepted 30 December 2021; Published 09 May 2022.
Corresponding author: Ana Umpiérrez; Avenida Italia 3318, CP 11600, Montevideo, Uruguay; aumpierrez@iibce.edu.uy |
Contenido : |
ABSTRACT.- Shiga toxin-producing Escherichia coli (STEC) infections are responsible for acute illnesses and deaths in humans. Cattle and humans are exposed to STEC through faeces and contaminated food and water. The big six and O157 STEC serogroups are important food and water-borne human pathogens. Additionally, Stx1a, Stx2a and Stx2c subtypes are highly associated with the haemolytic uremic syndrome. This study aimed to determine Shiga toxin-subtypes, the presence of antigen 43 families, the genotypic and phenotypic antimicrobial susceptibility profiles, O-serogrouping, phylotypes and phylogenetic relatedness of STEC of calf origin. Sixteen STEC isolates from calf origin were analysed. PCR was performed to determine Stx subtypes, serogroups, the presence of ag43 I and IIand phylotypes. The antimicrobial profile was evaluated and the presence of PMQR and fosfomycin genes was determined by PCR. The clonal relatedness of STEC was studied by PFGE. The genotypes stx1a+c,stx1a+, stx1a+/stx2e+, stx1a+c/stx2e and stx2awere detected. Ag43 II was the most prevalent among subfamilies. STEC isolates were serotyped as O103 (n=5) and O111 (n=6). Fifty per cent of the isolates were classified as B1 phylogroup, 4/16 as E, 1/16 as C, and 1/16 as F. Non-O157 STEC isolates showed a high level of diversity, independent of the geographical and farm-origin. Isolates were resistant to ampicillin, ciprofloxacin, gentamicin, and fosfomycin-trometamol. The gene fosA7 was detected in 1 isolate. The virulence profiles, including Shiga toxin-subtypes and serogroups, denote the potential harm of non-O157 STEC isolates to humans. We also confirmed that circulating non-O157 STEC from cattle present genetic heterogeneity and are susceptible to antibiotics. MenosABSTRACT.- Shiga toxin-producing Escherichia coli (STEC) infections are responsible for acute illnesses and deaths in humans. Cattle and humans are exposed to STEC through faeces and contaminated food and water. The big six and O157 STEC serogroups are important food and water-borne human pathogens. Additionally, Stx1a, Stx2a and Stx2c subtypes are highly associated with the haemolytic uremic syndrome. This study aimed to determine Shiga toxin-subtypes, the presence of antigen 43 families, the genotypic and phenotypic antimicrobial susceptibility profiles, O-serogrouping, phylotypes and phylogenetic relatedness of STEC of calf origin. Sixteen STEC isolates from calf origin were analysed. PCR was performed to determine Stx subtypes, serogroups, the presence of ag43 I and IIand phylotypes. The antimicrobial profile was evaluated and the presence of PMQR and fosfomycin genes was determined by PCR. The clonal relatedness of STEC was studied by PFGE. The genotypes stx1a+c,stx1a+, stx1a+/stx2e+, stx1a+c/stx2e and stx2awere detected. Ag43 II was the most prevalent among subfamilies. STEC isolates were serotyped as O103 (n=5) and O111 (n=6). Fifty per cent of the isolates were classified as B1 phylogroup, 4/16 as E, 1/16 as C, and 1/16 as F. Non-O157 STEC isolates showed a high level of diversity, independent of the geographical and farm-origin. Isolates were resistant to ampicillin, ciprofloxacin, gentamicin, and fosfomycin-trometamol. The gene fosA7 was detected in 1 isolate. The ... Presentar Todo |
Palabras claves : |
Antimicrobial resistance; Non-O157 STEC; PLATAFORMA EN SALUD ANIMAL; Shiga toxin subtypes. |
Asunto categoría : |
L01 Ganadería |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/16768/1/10.4067-s0719-81322022000200045.pdf
|
Marc : |
LEADER 03084naa a2200325 a 4500 001 1063578 005 2022-09-22 008 2022 bl uuuu u00u1 u #d 022 $a0719-8132 (print); e-ISSN 0719-8000 (electronic) 024 7 $a10.4067/S0719-81322022000200045$2DOI 100 1 $aUMPIÉRREZ , A. 245 $aNon-O157 Shiga toxin-producing Escherichia coli with potential harmful profiles to humans are isolated from the faeces of calves in Uruguay.$h[electronic resource] 260 $c2022 300 $cSSN 0719-8132 (version on-line) ISSN 0719-8000 (version print) 500 $aArticle history: Received 12 October 2021; Accepted 30 December 2021; Published 09 May 2022. Corresponding author: Ana Umpiérrez; Avenida Italia 3318, CP 11600, Montevideo, Uruguay; aumpierrez@iibce.edu.uy 520 $aABSTRACT.- Shiga toxin-producing Escherichia coli (STEC) infections are responsible for acute illnesses and deaths in humans. Cattle and humans are exposed to STEC through faeces and contaminated food and water. The big six and O157 STEC serogroups are important food and water-borne human pathogens. Additionally, Stx1a, Stx2a and Stx2c subtypes are highly associated with the haemolytic uremic syndrome. This study aimed to determine Shiga toxin-subtypes, the presence of antigen 43 families, the genotypic and phenotypic antimicrobial susceptibility profiles, O-serogrouping, phylotypes and phylogenetic relatedness of STEC of calf origin. Sixteen STEC isolates from calf origin were analysed. PCR was performed to determine Stx subtypes, serogroups, the presence of ag43 I and IIand phylotypes. The antimicrobial profile was evaluated and the presence of PMQR and fosfomycin genes was determined by PCR. The clonal relatedness of STEC was studied by PFGE. The genotypes stx1a+c,stx1a+, stx1a+/stx2e+, stx1a+c/stx2e and stx2awere detected. Ag43 II was the most prevalent among subfamilies. STEC isolates were serotyped as O103 (n=5) and O111 (n=6). Fifty per cent of the isolates were classified as B1 phylogroup, 4/16 as E, 1/16 as C, and 1/16 as F. Non-O157 STEC isolates showed a high level of diversity, independent of the geographical and farm-origin. Isolates were resistant to ampicillin, ciprofloxacin, gentamicin, and fosfomycin-trometamol. The gene fosA7 was detected in 1 isolate. The virulence profiles, including Shiga toxin-subtypes and serogroups, denote the potential harm of non-O157 STEC isolates to humans. We also confirmed that circulating non-O157 STEC from cattle present genetic heterogeneity and are susceptible to antibiotics. 653 $aAntimicrobial resistance 653 $aNon-O157 STEC 653 $aPLATAFORMA EN SALUD ANIMAL 653 $aShiga toxin subtypes 700 1 $aERNST, E. 700 1 $aCARDOZO, A. 700 1 $aTORRES, A. 700 1 $aFERNÁNDEZ, M. 700 1 $aFRAGA, M. 700 1 $aVIGNOLI, R. 700 1 $aBADO, I. 700 1 $aVIDAL, R. 700 1 $aZUNINO, P. 773 $tAustral Journal of Veterinary Sciences, 2022, Vol. 54 Issue 2, p.45-53. doi: https://doi.org/10.4067/S0719-81322022000200045
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