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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha : |
29/10/2020 |
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Actualizado : |
27/01/2021 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
GIANNITTI, F.; GARCÍA, J.P.; ROOD, J.I.; ADAMS, V.; ARMENDANO, J.I.; BEINGESSER, J.; UZAL, F.A. |
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Afiliación : |
FEDERICO GIANNITTI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JORGE P. GARCÍA, Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Tandil, Buenos Aires, Argentina.; JULIAN I. ROOD, Monash University, Clayton, Victoria, Australia.; VICKI ADAMS, Monash University, Clayton, Victoria, Australia; JOAQUÍN I. ARMENDANO, Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA), Tandil, Buenos Aires, Argentina.; JULIANN BEINGESSER, University of California at Davis, San Bernardino, CA, USA.; FRANCISCO A. UZAL, University of California at Davis, San Bernardino, CA, USA. |
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Título : |
Cardiopulmonary Lesions in Sheep Produced by Experimental Acute Clostridium Perfringens Type D Enterotoxemia. |
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Fecha de publicación : |
2021 |
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Fuente / Imprenta : |
Veterinay Pathology, volumen 58, number 1, pag. 103-113, 2021. Doi: https://doi.org/10.1177/0300985820965554 |
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DOI : |
10.1177/0300985820965554 |
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Idioma : |
Inglés |
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Notas : |
Article history: First Published October 15, 2020. Corresponding Author:Francisco A. Uzal, Email: fuzal@cahfs.ucdavis.edu. The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: Federico Giannitti acknowledges support from the Uruguayan ?Agencia Nacional de Investigaci ´on e Innovaci ´on? (ANII) through mobility grant MOV_CA_2018_1_150021. This work was supported by Grant R01 AI056177 from the National Institute of Allergy and Infectious Diseases (NIAID). Research at Monash University was also supported by funding provided by the Australian Research Council to the Australian Research Council Centre of Excellence in Structural and Functional Microbial Genomics (Grant CE0562063). |
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Contenido : |
Abstract:Enterotoxemia caused by Clostridium perfringens type D is one of the most prevalent clostridial diseases of sheep. The lesions of
the acute form of this disease, particularly the cerebral lesions, are well characterized; however, detailed descriptions of the cardiac and pulmonary lesions are lacking. Here we describe cardiopulmonary lesions in experimental acute type D enterotoxemia in sheep and determine the role of epsilon toxin (ETX) in the development of these lesions. Four groups of 6 sheep were intraduodenally inoculated with either a wild-type C. perfringens type D strain; its etx knockout mutant, which is unable to produce ETX; the etx mutant complemented with the wild-type etx gene, which regains the ETX toxigenic ability; or sterile culture
medium as a control. All sheep were subjected to postmortem examination within 24 hours of inoculation. Lesion scores were compared between groups for pulmonary edema; hydrothorax; ascites; hydropericardium; endocardial, myocardial and epicardial hemorrhages; microscopic lesions of acute myocardial degeneration and necrosis; and myocardial, endocardial, and epicardial edema, hemorrhage, and inflammation. Only sheep inoculated with the wild-type and complemented ETX-toxigenic bacterial strains developed cardiopulmonary lesions, which were present in varying degrees of severity and proportions. These lesions were not present in sheep inoculated with the etx mutant or in the negative control. We conclude that severe acute cardiopulmonary lesions in sheep with experimental enterotoxemia are associated with the capacity of the strains to produce ETX. These changes are likely contributors to the clinical signs and even death of affected animals. MenosAbstract:Enterotoxemia caused by Clostridium perfringens type D is one of the most prevalent clostridial diseases of sheep. The lesions of
the acute form of this disease, particularly the cerebral lesions, are well characterized; however, detailed descriptions of the cardiac and pulmonary lesions are lacking. Here we describe cardiopulmonary lesions in experimental acute type D enterotoxemia in sheep and determine the role of epsilon toxin (ETX) in the development of these lesions. Four groups of 6 sheep were intraduodenally inoculated with either a wild-type C. perfringens type D strain; its etx knockout mutant, which is unable to produce ETX; the etx mutant complemented with the wild-type etx gene, which regains the ETX toxigenic ability; or sterile culture
medium as a control. All sheep were subjected to postmortem examination within 24 hours of inoculation. Lesion scores were compared between groups for pulmonary edema; hydrothorax; ascites; hydropericardium; endocardial, myocardial and epicardial hemorrhages; microscopic lesions of acute myocardial degeneration and necrosis; and myocardial, endocardial, and epicardial edema, hemorrhage, and inflammation. Only sheep inoculated with the wild-type and complemented ETX-toxigenic bacterial strains developed cardiopulmonary lesions, which were present in varying degrees of severity and proportions. These lesions were not present in sheep inoculated with the etx mutant or in the negative control. We conclude that severe acute ... Presentar Todo |
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Palabras claves : |
CLOSTRIDIUM PERFRINGENS TYPE D; EPSILON TOXIN; HEART; LUNGS; PATHOLOGY; PLATAFORMA SALUD ANIMAL; SHEEP. |
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Thesagro : |
ENFERMEDADES DE LOS ANIMALES; OVEJA. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 03466naa a2200325 a 4500
001 1061439
005 2021-01-27
008 2021 bl uuuu u00u1 u #d
024 7 $a10.1177/0300985820965554$2DOI
100 1 $aGIANNITTI, F.
245 $aCardiopulmonary Lesions in Sheep Produced by Experimental Acute Clostridium Perfringens Type D Enterotoxemia.$h[electronic resource]
260 $c2021
500 $aArticle history: First Published October 15, 2020. Corresponding Author:Francisco A. Uzal, Email: fuzal@cahfs.ucdavis.edu. The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: Federico Giannitti acknowledges support from the Uruguayan ?Agencia Nacional de Investigaci ´on e Innovaci ´on? (ANII) through mobility grant MOV_CA_2018_1_150021. This work was supported by Grant R01 AI056177 from the National Institute of Allergy and Infectious Diseases (NIAID). Research at Monash University was also supported by funding provided by the Australian Research Council to the Australian Research Council Centre of Excellence in Structural and Functional Microbial Genomics (Grant CE0562063).
520 $aAbstract:Enterotoxemia caused by Clostridium perfringens type D is one of the most prevalent clostridial diseases of sheep. The lesions of the acute form of this disease, particularly the cerebral lesions, are well characterized; however, detailed descriptions of the cardiac and pulmonary lesions are lacking. Here we describe cardiopulmonary lesions in experimental acute type D enterotoxemia in sheep and determine the role of epsilon toxin (ETX) in the development of these lesions. Four groups of 6 sheep were intraduodenally inoculated with either a wild-type C. perfringens type D strain; its etx knockout mutant, which is unable to produce ETX; the etx mutant complemented with the wild-type etx gene, which regains the ETX toxigenic ability; or sterile culture medium as a control. All sheep were subjected to postmortem examination within 24 hours of inoculation. Lesion scores were compared between groups for pulmonary edema; hydrothorax; ascites; hydropericardium; endocardial, myocardial and epicardial hemorrhages; microscopic lesions of acute myocardial degeneration and necrosis; and myocardial, endocardial, and epicardial edema, hemorrhage, and inflammation. Only sheep inoculated with the wild-type and complemented ETX-toxigenic bacterial strains developed cardiopulmonary lesions, which were present in varying degrees of severity and proportions. These lesions were not present in sheep inoculated with the etx mutant or in the negative control. We conclude that severe acute cardiopulmonary lesions in sheep with experimental enterotoxemia are associated with the capacity of the strains to produce ETX. These changes are likely contributors to the clinical signs and even death of affected animals.
650 $aENFERMEDADES DE LOS ANIMALES
650 $aOVEJA
653 $aCLOSTRIDIUM PERFRINGENS TYPE D
653 $aEPSILON TOXIN
653 $aHEART
653 $aLUNGS
653 $aPATHOLOGY
653 $aPLATAFORMA SALUD ANIMAL
653 $aSHEEP
700 1 $aGARCÍA, J.P.
700 1 $aROOD, J.I.
700 1 $aADAMS, V.
700 1 $aARMENDANO, J.I.
700 1 $aBEINGESSER, J.
700 1 $aUZAL, F.A.
773 $tVeterinay Pathology, volumen 58, number 1, pag. 103-113, 2021. Doi: https://doi.org/10.1177/0300985820965554
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INIA La Estanzuela (LE) |
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Registro completo
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Biblioteca (s) : |
INIA Treinta y Tres. |
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Fecha actual : |
24/02/2021 |
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Actualizado : |
24/02/2021 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
-- - -- |
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Autor : |
TSENG, M.C.; ROEL, A.; MACEDO, I.; MARELLA, M.; TERRA, J.A.; ZORRILLA DE SAN MARTÍN, G.; PITTELKOW, C. M. |
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Afiliación : |
MENG-CHUN TSENG, University of Illinois-Urbana-Champaign. Department of Crop Sciences. USA.; ALVARO ROEL DELLAZOPPA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; IGNACIO MACEDO YAPOR, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MUZIO MARELLA, SAMAN (Sociedad Anónima Molinos Arroceros Nacionales), Uruguay.; JOSÉ ALFREDO TERRA FERNÁNDEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; GONZALO ROBERTO ZORRILLA DE SAN MARTÍN PEREYRA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; CAMERON M. PITTELKOW, University of Illinois-Urbana-Champaign. Department of Crop Sciences. USA / UC Davis. Department of Plant Sciences. USA. |
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Título : |
Field-level factors for closing yield gaps in high-yielding rice systems of Uruguay. |
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Fecha de publicación : |
2021 |
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Fuente / Imprenta : |
Field Crops Research, February 2021, vol. 264, no. 108097. Doi: https://doi.org/10.1016/j.fcr.2021.108097 |
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Páginas : |
12 p. |
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DOI : |
10.1016/j.fcr.2021.108097 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 9 April 2020 / Received in revised form 12 January 2021 / Accepted 5 February 2021 / Available online 24 February 2021. |
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Contenido : |
Abstract:
Yield gap assessments at the field-level are key for developing management practices to increase crop production in a sustainable manner. Although rice is an important food crop worldwide, yield gaps remain less investigated in Latin American rice systems. In this study, we evaluated field-level factors for closing yield gaps (based on
attainable farm yield, defined as the mean of top 10 % of farmers) for rice production in Uruguay using crop management and yield records from 2012 to 2017, covering approximately 70,000 ha per year (40 % of total rice area). The mean annual attainable yield gap ranged from 16 % to 22 % in fields with non-hybrid cultivars (90 %
of planted area) and from 14 % to 22 % in fields with hybrid rice (10 % of planted area). Early seeding was identified as the most influential factor for reducing yield gaps in both systems, followed by N rate. Stand establishment was also important for closing yield gap in non-hybrid fields, while rotation with improved pasture was important in hybrid fields. When variables were categorized as input-related, manageable, or nonmanageable, on average manageable factors (e.g. early planting and stand stablishment) were more important than input-related factors (e.g. seed or fertilizer rate). This study highlights a simple, self-contained method using large field-level datasets to quantify yield gaps and develop strategies for improving agricultural productivity. |
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Palabras claves : |
CROP MANAGEMENT; RICE; SISTEMA ARROZ-PASTURAS; SOUTH AMERICA; YIELD GAP. |
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Asunto categoría : |
F01 Cultivo |
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Marc : |
LEADER 02446naa a2200289 a 4500
001 1061757
005 2021-02-24
008 2021 bl uuuu u00u1 u #d
024 7 $a10.1016/j.fcr.2021.108097$2DOI
100 1 $aTSENG, M.C.
245 $aField-level factors for closing yield gaps in high-yielding rice systems of Uruguay.$h[electronic resource]
260 $c2021
300 $a12 p.
500 $aArticle history: Received 9 April 2020 / Received in revised form 12 January 2021 / Accepted 5 February 2021 / Available online 24 February 2021.
520 $aAbstract: Yield gap assessments at the field-level are key for developing management practices to increase crop production in a sustainable manner. Although rice is an important food crop worldwide, yield gaps remain less investigated in Latin American rice systems. In this study, we evaluated field-level factors for closing yield gaps (based on attainable farm yield, defined as the mean of top 10 % of farmers) for rice production in Uruguay using crop management and yield records from 2012 to 2017, covering approximately 70,000 ha per year (40 % of total rice area). The mean annual attainable yield gap ranged from 16 % to 22 % in fields with non-hybrid cultivars (90 % of planted area) and from 14 % to 22 % in fields with hybrid rice (10 % of planted area). Early seeding was identified as the most influential factor for reducing yield gaps in both systems, followed by N rate. Stand establishment was also important for closing yield gap in non-hybrid fields, while rotation with improved pasture was important in hybrid fields. When variables were categorized as input-related, manageable, or nonmanageable, on average manageable factors (e.g. early planting and stand stablishment) were more important than input-related factors (e.g. seed or fertilizer rate). This study highlights a simple, self-contained method using large field-level datasets to quantify yield gaps and develop strategies for improving agricultural productivity.
653 $aCROP MANAGEMENT
653 $aRICE
653 $aSISTEMA ARROZ-PASTURAS
653 $aSOUTH AMERICA
653 $aYIELD GAP
700 1 $aROEL, A.
700 1 $aMACEDO, I.
700 1 $aMARELLA, M.
700 1 $aTERRA, J.A.
700 1 $aZORRILLA DE SAN MARTÍN, G.
700 1 $aPITTELKOW, C. M.
773 $tField Crops Research, February 2021, vol. 264, no. 108097. Doi: https://doi.org/10.1016/j.fcr.2021.108097
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