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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
Fecha : |
18/11/2015 |
Actualizado : |
03/10/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Autor : |
RODRÍGUEZ, A.V.; GOLDBERG, V.; VIOTTI, H.; CIAPPESONI, G. |
Afiliación : |
A.V. RODRÍGUEZ, Universidad de la República (UdelaR)/ Facultad de Veterinaria; VIRGINIA GOLDBERG BIANCHI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; H. VIOTTI, Universidad de la República (UdelaR)/ Facultad de Veterinaria; CARLOS GABRIEL CIAPPESONI SCARONE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Early detection of Haemonchus contortus infection in sheep using three different faecal occult blood tests. |
Fecha de publicación : |
2015 |
Fuente / Imprenta : |
Open Veterinary Journal, 2015, v.5, no.2, p. 90-97. OPEN ACCESS |
Descripción física : |
2-s2.0-84899666262 |
ISSN : |
2226-4485 (Print) ISSN: 2218-6050 (Online) |
Idioma : |
Inglés |
Notas : |
Submitted: 04/03/2015; Accepted: 01/06/2015; Published: 11/07/2015 |
Contenido : |
ABSTRACT.
Haemonchus contortus is a blood-sucking parasite causing the presence of faecal occult blood (FOB). The objective was to study three different FOB tests in order to have a new indicator of H. contortus infection in sheep that could be included in the genetic evaluation system as an alternative selection criterion to faecal worm egg count (FEC). A total
of 29 Corriedale lambs were experimentally infected with 10.000 larvae of H. contortus. Stool samples were recorded for FEC and FOB tests (Hexagon, Hematest® and Multistix®), blood for packed cell volume (PCV), haemoglobin, white and red blood cell count (RBC), and FAMACHA© for scoring anaemia. At the end of the experiment lambs were slaughtered to worm burden count. Field infection was achieved in 309 Merino lambs under natural parasite challenge. FEC data were normalized through logarithmic transformation (LnFEC). Pearson correlation was estimated to examine the relationship between all traits. The three tests were able to detect the presence of FOB at day 11. FEC, PCV and RBC decreased to sub-normal values from day 18. FAMACHA© score 3 was considered to be indicative of anaemia. Most of the correlations were of high magnitude, with the exception of Multistix® test that was moderately correlated with haematological parameters, LnFEC and FEC. In field infection, most samples were negative to FOB tests and the correlations were lower than those calculated under experimental infection. In conclusion, FOB tests were able to detect haemonchosis earlier than FEC under high experimental parasite challenge. However, they were
not able to detect FOB under natural mixed parasite challenge. FAMACHA© and PCV demonstrated to be good indicators of Haemonchosis, having moderate to high correlations with FEC. MenosABSTRACT.
Haemonchus contortus is a blood-sucking parasite causing the presence of faecal occult blood (FOB). The objective was to study three different FOB tests in order to have a new indicator of H. contortus infection in sheep that could be included in the genetic evaluation system as an alternative selection criterion to faecal worm egg count (FEC). A total
of 29 Corriedale lambs were experimentally infected with 10.000 larvae of H. contortus. Stool samples were recorded for FEC and FOB tests (Hexagon, Hematest® and Multistix®), blood for packed cell volume (PCV), haemoglobin, white and red blood cell count (RBC), and FAMACHA© for scoring anaemia. At the end of the experiment lambs were slaughtered to worm burden count. Field infection was achieved in 309 Merino lambs under natural parasite challenge. FEC data were normalized through logarithmic transformation (LnFEC). Pearson correlation was estimated to examine the relationship between all traits. The three tests were able to detect the presence of FOB at day 11. FEC, PCV and RBC decreased to sub-normal values from day 18. FAMACHA© score 3 was considered to be indicative of anaemia. Most of the correlations were of high magnitude, with the exception of Multistix® test that was moderately correlated with haematological parameters, LnFEC and FEC. In field infection, most samples were negative to FOB tests and the correlations were lower than those calculated under experimental infection. In conclusion, FOB tests were a... Presentar Todo |
Palabras claves : |
FAEAL WORM EGG COUNT; FAECAL OCCULT BLOOD TEST; HAEMONCHOSIS; SHEPP. |
Thesagro : |
ENFERMEDADES PARASITARIAS; OVEJAS; OVINOS. |
Asunto categoría : |
L73 Enfermedades de los animales |
URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/5250/1/Goldberg-G.-2015.-Open-Veterinary-Jr.-v.52-p.90-97.pdf
http://www.openveterinaryjournal.com/2015/Volume%205%20(2)/OVJ-038-03-15%20A.V.%20Rodriguez%20et%20al.pdf
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Marc : |
LEADER 02691naa a2200277 a 4500 001 1053938 005 2019-10-03 008 2015 bl uuuu u00u1 u #d 022 $a2226-4485 (Print) ISSN: 2218-6050 (Online) 100 1 $aRODRÍGUEZ, A.V. 245 $aEarly detection of Haemonchus contortus infection in sheep using three different faecal occult blood tests.$h[electronic resource] 260 $c2015 300 $c2-s2.0-84899666262 500 $aSubmitted: 04/03/2015; Accepted: 01/06/2015; Published: 11/07/2015 520 $aABSTRACT. Haemonchus contortus is a blood-sucking parasite causing the presence of faecal occult blood (FOB). The objective was to study three different FOB tests in order to have a new indicator of H. contortus infection in sheep that could be included in the genetic evaluation system as an alternative selection criterion to faecal worm egg count (FEC). A total of 29 Corriedale lambs were experimentally infected with 10.000 larvae of H. contortus. Stool samples were recorded for FEC and FOB tests (Hexagon, Hematest® and Multistix®), blood for packed cell volume (PCV), haemoglobin, white and red blood cell count (RBC), and FAMACHA© for scoring anaemia. At the end of the experiment lambs were slaughtered to worm burden count. Field infection was achieved in 309 Merino lambs under natural parasite challenge. FEC data were normalized through logarithmic transformation (LnFEC). Pearson correlation was estimated to examine the relationship between all traits. The three tests were able to detect the presence of FOB at day 11. FEC, PCV and RBC decreased to sub-normal values from day 18. FAMACHA© score 3 was considered to be indicative of anaemia. Most of the correlations were of high magnitude, with the exception of Multistix® test that was moderately correlated with haematological parameters, LnFEC and FEC. In field infection, most samples were negative to FOB tests and the correlations were lower than those calculated under experimental infection. In conclusion, FOB tests were able to detect haemonchosis earlier than FEC under high experimental parasite challenge. However, they were not able to detect FOB under natural mixed parasite challenge. FAMACHA© and PCV demonstrated to be good indicators of Haemonchosis, having moderate to high correlations with FEC. 650 $aENFERMEDADES PARASITARIAS 650 $aOVEJAS 650 $aOVINOS 653 $aFAEAL WORM EGG COUNT 653 $aFAECAL OCCULT BLOOD TEST 653 $aHAEMONCHOSIS 653 $aSHEPP 700 1 $aGOLDBERG, V. 700 1 $aVIOTTI, H. 700 1 $aCIAPPESONI, G. 773 $tOpen Veterinary Journal, 2015$gv.5, no.2, p. 90-97. OPEN ACCESS
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INIA Las Brujas (LB) |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
Fecha actual : |
16/06/2022 |
Actualizado : |
02/12/2022 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
Internacional - -- |
Autor : |
JÁUREGUI, J.M.; OJEDA, J.J.; BERONE, G.D.; LATTANZI, F.; BAUDRACCO, J.; FARIÑA, S.; MOOT, D.J. |
Afiliación : |
JOSÉ MARTÍN JÁUREGUI, Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Kreder 2807, Esperanza, Santa Fe, 3080 Argentina; Gentos S.A., Dardo Rocha 3197, Martínez, Buenos Aires.; JONATHAN J. OJEDA, Regrow Ag, Brisbane, Queensland, Australia.; GERMÁN DARÍO BERONE, EEA Balcarce, Instituto Nacional de Tecnología Agropecuaria, Ruta 226, Km 73,5, Balcarce, Buenos Aires, 7620 Argentina Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Ruta 226, km 73,5, Balcarce, Buenos Aires,Ar.; FERNANDO A. LATTANZI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JAVIER BAUDRACCO, Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Kreder 2807, Esperanza, Santa Fe, 3080 Argentina.; SANTIAGO FARIÑA, INIA (Instituto Nacional de Investigación Agropecuaria); DERRICK J. MOOT, Faculty of Agriculture and Life Sciences, Field Research Centre, PO Box 7647, Lincoln University, Canterbury, New Zealand. |
Título : |
Yield gaps of lucerne (Medicago sativa L.) in livestock systems of Argentina. |
Fecha de publicación : |
2022 |
Fuente / Imprenta : |
Annals of Applied Biology, July 2022, Volume 181, Issue 1, pages 22-32. doi: https://doi.org/10.1111/aab.12745 |
ISSN : |
0003-4746 |
DOI : |
10.1111/aab.12745 |
Idioma : |
Inglés |
Notas : |
Article history: Received: 24 March 2021/ Revised: 8 October 2021/ Accepted: 9 October 2021. -- Corresponding author: Jáuregui, J.M.; Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Kreder 2807, Santa Fe, Esperanza, Argentina; email:josemartinjauregui@gmail.com -- Funding:
The authors thank Dr Gonzalo Berhongaray for his insightful comments that helped to improve the manuscript and an anonymous referee who provided valuable feedback. The authors also wish to specially thank everyone involved in the data collection of the NLCEN (Valeria Arolfo, Ariel Odorizzi, Daniel Basigalup, Silvia Olivo, Luis Romero, Alejo Re, Cecilia Sardiña, Laura Fontana, Néstor Romero, Mario Funes, Mónica Cornacchione, Elena Di Nucci, Juan José Gallego, Fernanda Neira Zilli, Dante Pueyo and Lourdes Mijoevich). FAL was financially supported by PROCISUR and FONTAGRO through the project “Uso de leguminosas en sistemas ganaderos sudamericanos”. GDB was financially supported by INTA (project “Incremento sostenible de la producción y utilización de pasturas y forrajes conservados”) and FCA-UNMDP (project “Uso responsable del nitrógeno en ganadería: fertilización y leguminosas”). |
Contenido : |
Abstract:
Argentina grows the second-largest area of lucerne in the world. Despite its importance, a yield gap exists between potential and measured yields, but factors contributing to it are still unclear. This study aimed to identify management factors and research needs to reduce the lucerne yield gap to improve the livestock systems in this region. We used meteorological data coupled with lucerne crop modelling and measured yields from the National Lucerne Cultivar Evaluation Network (NLCEN) to quantify the lucerne yield gap in nine sites located within the Argentinian Pampas (between parallels 30?45°S and meridians 58?65°W) and three sites outside the Pampas. Specifically, we used the model developed by McCall & Bishop-Hurley (2003), adapted and calibrated for lucerne in Argentina by Berone et al. (2017) to estimate the potential yield (PY) for 12 locations (three irrigated and nine rainfed), and compared those results with measured yields from the NLCEN to calculate yield gaps. We found the average available photosynthetic active radiation (PAR) and temperatures were sufficient to achieve 21.5 ±?3.7 t dry matter (DM) ha?1 yr?1 under rainfed conditions (environments with mean annual rainfall from 400 to 1,200?mm). However, the average measured yield from the NLCEN was 16.8 ±?2.4 t DM ha?1 yr?1 (a 22% gap). Potential yields ranged between 10 and 25?t DM ha?1 yr?1 under rainfed conditions and between 25 and 39?t DM ha?1 yr?1 for irrigated crops. As latitude increased rainfed locations had lower yields, while irrigated locations had higher yields. Adding irrigation was predicted to increase yields to 35.4 ±?2.0 t DM ha?1 yr?1 (a 53% gap) in rainfed sites. For irrigated locations, the gap was smaller (27.3 ±?3.5 vs 32.4 ±?2.2 t DM ha?1 yr?1 for measured vs potential yield, respectively), and most likely linked to nutrient deficits. Also, current grazing management was estimated to achieve approximately 50% less grazing efficiency than optimal grazing management. Our results demonstrated that the livestock industry can potentially increase animal production under current environmental conditions. The four main adjustments to achieve this are increased use of irrigation, increased use of fertilisers, earlier commencement of grazing in spring and increased stocking rates. The costs of irrigation, fertilisers and grazing management are envisaged to be small compared with potential increases in incomes and thus profitability available to beef and dairy farmers using lucerne as a major feed source in Argentina. MenosAbstract:
Argentina grows the second-largest area of lucerne in the world. Despite its importance, a yield gap exists between potential and measured yields, but factors contributing to it are still unclear. This study aimed to identify management factors and research needs to reduce the lucerne yield gap to improve the livestock systems in this region. We used meteorological data coupled with lucerne crop modelling and measured yields from the National Lucerne Cultivar Evaluation Network (NLCEN) to quantify the lucerne yield gap in nine sites located within the Argentinian Pampas (between parallels 30?45°S and meridians 58?65°W) and three sites outside the Pampas. Specifically, we used the model developed by McCall & Bishop-Hurley (2003), adapted and calibrated for lucerne in Argentina by Berone et al. (2017) to estimate the potential yield (PY) for 12 locations (three irrigated and nine rainfed), and compared those results with measured yields from the NLCEN to calculate yield gaps. We found the average available photosynthetic active radiation (PAR) and temperatures were sufficient to achieve 21.5 ±?3.7 t dry matter (DM) ha?1 yr?1 under rainfed conditions (environments with mean annual rainfall from 400 to 1,200?mm). However, the average measured yield from the NLCEN was 16.8 ±?2.4 t DM ha?1 yr?1 (a 22% gap). Potential yields ranged between 10 and 25?t DM ha?1 yr?1 under rainfed conditions and between 25 and 39?t DM ha?1 yr?1 for irrigated crops. As latitude increased rain... Presentar Todo |
Palabras claves : |
ALFALFA; CROP MANAGEMENT; GRAZING MANAGEMENT; MEDICAGO SATIVA L. |
Thesagro : |
ARGENTINA. |
Asunto categoría : |
-- |
Marc : |
LEADER 04602naa a2200289 a 4500 001 1063318 005 2022-12-02 008 2022 bl uuuu u00u1 u #d 022 $a0003-4746 024 7 $a10.1111/aab.12745$2DOI 100 1 $aJÁUREGUI, J.M. 245 $aYield gaps of lucerne (Medicago sativa L.) in livestock systems of Argentina.$h[electronic resource] 260 $c2022 500 $aArticle history: Received: 24 March 2021/ Revised: 8 October 2021/ Accepted: 9 October 2021. -- Corresponding author: Jáuregui, J.M.; Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Kreder 2807, Santa Fe, Esperanza, Argentina; email:josemartinjauregui@gmail.com -- Funding: The authors thank Dr Gonzalo Berhongaray for his insightful comments that helped to improve the manuscript and an anonymous referee who provided valuable feedback. The authors also wish to specially thank everyone involved in the data collection of the NLCEN (Valeria Arolfo, Ariel Odorizzi, Daniel Basigalup, Silvia Olivo, Luis Romero, Alejo Re, Cecilia Sardiña, Laura Fontana, Néstor Romero, Mario Funes, Mónica Cornacchione, Elena Di Nucci, Juan José Gallego, Fernanda Neira Zilli, Dante Pueyo and Lourdes Mijoevich). FAL was financially supported by PROCISUR and FONTAGRO through the project “Uso de leguminosas en sistemas ganaderos sudamericanos”. GDB was financially supported by INTA (project “Incremento sostenible de la producción y utilización de pasturas y forrajes conservados”) and FCA-UNMDP (project “Uso responsable del nitrógeno en ganadería: fertilización y leguminosas”). 520 $aAbstract: Argentina grows the second-largest area of lucerne in the world. Despite its importance, a yield gap exists between potential and measured yields, but factors contributing to it are still unclear. This study aimed to identify management factors and research needs to reduce the lucerne yield gap to improve the livestock systems in this region. We used meteorological data coupled with lucerne crop modelling and measured yields from the National Lucerne Cultivar Evaluation Network (NLCEN) to quantify the lucerne yield gap in nine sites located within the Argentinian Pampas (between parallels 30?45°S and meridians 58?65°W) and three sites outside the Pampas. Specifically, we used the model developed by McCall & Bishop-Hurley (2003), adapted and calibrated for lucerne in Argentina by Berone et al. (2017) to estimate the potential yield (PY) for 12 locations (three irrigated and nine rainfed), and compared those results with measured yields from the NLCEN to calculate yield gaps. We found the average available photosynthetic active radiation (PAR) and temperatures were sufficient to achieve 21.5 ±?3.7 t dry matter (DM) ha?1 yr?1 under rainfed conditions (environments with mean annual rainfall from 400 to 1,200?mm). However, the average measured yield from the NLCEN was 16.8 ±?2.4 t DM ha?1 yr?1 (a 22% gap). Potential yields ranged between 10 and 25?t DM ha?1 yr?1 under rainfed conditions and between 25 and 39?t DM ha?1 yr?1 for irrigated crops. As latitude increased rainfed locations had lower yields, while irrigated locations had higher yields. Adding irrigation was predicted to increase yields to 35.4 ±?2.0 t DM ha?1 yr?1 (a 53% gap) in rainfed sites. For irrigated locations, the gap was smaller (27.3 ±?3.5 vs 32.4 ±?2.2 t DM ha?1 yr?1 for measured vs potential yield, respectively), and most likely linked to nutrient deficits. Also, current grazing management was estimated to achieve approximately 50% less grazing efficiency than optimal grazing management. Our results demonstrated that the livestock industry can potentially increase animal production under current environmental conditions. The four main adjustments to achieve this are increased use of irrigation, increased use of fertilisers, earlier commencement of grazing in spring and increased stocking rates. The costs of irrigation, fertilisers and grazing management are envisaged to be small compared with potential increases in incomes and thus profitability available to beef and dairy farmers using lucerne as a major feed source in Argentina. 650 $aARGENTINA 653 $aALFALFA 653 $aCROP MANAGEMENT 653 $aGRAZING MANAGEMENT 653 $aMEDICAGO SATIVA L 700 1 $aOJEDA, J.J. 700 1 $aBERONE, G.D. 700 1 $aLATTANZI, F. 700 1 $aBAUDRACCO, J. 700 1 $aFARIÑA, S. 700 1 $aMOOT, D.J. 773 $tAnnals of Applied Biology, July 2022, Volume 181, Issue 1, pages 22-32. doi: https://doi.org/10.1111/aab.12745
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