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Biblioteca (s) : |
INIA Treinta y Tres. |
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Fecha : |
24/11/2015 |
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Actualizado : |
24/06/2021 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
COTTLE, D.J.; VELAZCO, J.I.; HEGARTY, R.S.; MAYER, D.G. |
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Afiliación : |
JOSÉ IGNACIO VELAZCO DE LOS REYES, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Estimating daily methane production in individual cattle with irregular feed intake patterns from short-term methane emission measurements. |
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Fecha de publicación : |
2015 |
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Fuente / Imprenta : |
Animal, 2015, v. 9 (12), p. 1949-1957. |
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DOI : |
10.1017/S1751731115001676 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 19 March 2015; Accepted 17 July 2015; First published online 24 August 2015. |
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Contenido : |
Spot measurements of methane emission rate (n = 18 700) by 24 Angus steers fed mixed rations from GrowSafe feeders were made over 3- to 6-min periods by a reenFeed emission monitoring (GEM) unit. The data were analysed to estimate daily methane production (DMP; g/day) and derived methane yield (MY; g/kg dry matter intake (DMI)). A one-compartment dose model of spot emission rate v. time since the preceding meal was compared with the models of Wood (1967) and Dijkstra et al. (1997) and the average of spot measures. Fitted values for DMP were calculated from the area under the curves. Two methods of relating methane and feed intakes were then studied: the classical calculation of MY as DMP/DMI (kg/day); and a novel method of estimating DMP from time and size of preceding meals using either the data for only the two meals preceding a spot measurement, or all meals for 3 days prior. Two approaches were also used to estimate DMP from spot measurements: fitting of
splines on a ?per-animal per-day? basis and an alternate approach of modelling DMP after each feed event by least squares (using Solver), summing (for each animal) the contributions from each feed event by best-fitting a one-compartment model. Time since the preceding meal was of limited value in estimating DMP. Even when the meal sizes and time intervals between a spot measurement and all feeding events in the previous 72 h were assessed, only 16.9% of the variance in spot emission rate
measured by GEM was explained by this feeding information. While using the preceding meal alone gave a biased (underestimate) of DMP, allowing for a longer feed history removed this bias. A power analysis taking into account the sources of variation in DMP indicated that to obtain an estimate of DMP with a 95% confidence interval within 5% of the observed 64 days mean of spot measures would require 40 animals measured over 45 days (two spot measurements per day) or 30 animals measured over 55 days. These numbers suggest that spot measurements could be made in association with feed efficiency tests made over 70 days. Spot measurements of enteric emissions can be used to define DMP but the number of animals and samples are larger than are needed when day-long measures are made. MenosSpot measurements of methane emission rate (n = 18 700) by 24 Angus steers fed mixed rations from GrowSafe feeders were made over 3- to 6-min periods by a reenFeed emission monitoring (GEM) unit. The data were analysed to estimate daily methane production (DMP; g/day) and derived methane yield (MY; g/kg dry matter intake (DMI)). A one-compartment dose model of spot emission rate v. time since the preceding meal was compared with the models of Wood (1967) and Dijkstra et al. (1997) and the average of spot measures. Fitted values for DMP were calculated from the area under the curves. Two methods of relating methane and feed intakes were then studied: the classical calculation of MY as DMP/DMI (kg/day); and a novel method of estimating DMP from time and size of preceding meals using either the data for only the two meals preceding a spot measurement, or all meals for 3 days prior. Two approaches were also used to estimate DMP from spot measurements: fitting of
splines on a ?per-animal per-day? basis and an alternate approach of modelling DMP after each feed event by least squares (using Solver), summing (for each animal) the contributions from each feed event by best-fitting a one-compartment model. Time since the preceding meal was of limited value in estimating DMP. Even when the meal sizes and time intervals between a spot measurement and all feeding events in the previous 72 h were assessed, only 16.9% of the variance in spot emission rate
measured by GEM was explained by ... Presentar Todo |
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Palabras claves : |
GASES DE EFECTO INVERNADERO; GREENFEED; MODELS; SPLINES. |
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Thesagro : |
METANO; MODELOS ANIMALES; VACUNOS. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 03126naa a2200265 a 4500
001 1053984
005 2021-06-24
008 2015 bl uuuu u00u1 u #d
024 7 $a10.1017/S1751731115001676$2DOI
100 1 $aCOTTLE, D.J.
245 $aEstimating daily methane production in individual cattle with irregular feed intake patterns from short-term methane emission measurements.$h[electronic resource]
260 $c2015
500 $aArticle history: Received 19 March 2015; Accepted 17 July 2015; First published online 24 August 2015.
520 $aSpot measurements of methane emission rate (n = 18 700) by 24 Angus steers fed mixed rations from GrowSafe feeders were made over 3- to 6-min periods by a reenFeed emission monitoring (GEM) unit. The data were analysed to estimate daily methane production (DMP; g/day) and derived methane yield (MY; g/kg dry matter intake (DMI)). A one-compartment dose model of spot emission rate v. time since the preceding meal was compared with the models of Wood (1967) and Dijkstra et al. (1997) and the average of spot measures. Fitted values for DMP were calculated from the area under the curves. Two methods of relating methane and feed intakes were then studied: the classical calculation of MY as DMP/DMI (kg/day); and a novel method of estimating DMP from time and size of preceding meals using either the data for only the two meals preceding a spot measurement, or all meals for 3 days prior. Two approaches were also used to estimate DMP from spot measurements: fitting of splines on a ?per-animal per-day? basis and an alternate approach of modelling DMP after each feed event by least squares (using Solver), summing (for each animal) the contributions from each feed event by best-fitting a one-compartment model. Time since the preceding meal was of limited value in estimating DMP. Even when the meal sizes and time intervals between a spot measurement and all feeding events in the previous 72 h were assessed, only 16.9% of the variance in spot emission rate measured by GEM was explained by this feeding information. While using the preceding meal alone gave a biased (underestimate) of DMP, allowing for a longer feed history removed this bias. A power analysis taking into account the sources of variation in DMP indicated that to obtain an estimate of DMP with a 95% confidence interval within 5% of the observed 64 days mean of spot measures would require 40 animals measured over 45 days (two spot measurements per day) or 30 animals measured over 55 days. These numbers suggest that spot measurements could be made in association with feed efficiency tests made over 70 days. Spot measurements of enteric emissions can be used to define DMP but the number of animals and samples are larger than are needed when day-long measures are made.
650 $aMETANO
650 $aMODELOS ANIMALES
650 $aVACUNOS
653 $aGASES DE EFECTO INVERNADERO
653 $aGREENFEED
653 $aMODELS
653 $aSPLINES
700 1 $aVELAZCO, J.I.
700 1 $aHEGARTY, R.S.
700 1 $aMAYER, D.G.
773 $tAnimal, 2015$gv. 9 (12), p. 1949-1957.
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Registro original : |
INIA Treinta y Tres (TT) |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha actual : |
10/12/2020 |
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Actualizado : |
05/09/2022 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - -- |
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Autor : |
MARGINEDA, C.; GIANNITTI, F.; LIGUORI, E.; RUSSO, S.; CASTRO, D.J; ZIELINSKI, G. |
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Afiliación : |
CARLOS MARGINEDA, anidad Animal, Estación Experimental Agropecuaria Marcos Juárez, Instituto Nacional de Tecnología Agropecuaria (INTA), Córdoba, Argentina.; FEDERICO GIANNITTI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ESTEBAN LIGUORI, Cátedra de Enfermedades Infecciosas, Facultad de Ciencias Veterinarias, Universidad Nacional de Rosario, Casilda, Santa Fe, Argentina; SUSANA RUSSO, Departamento de Rabia y Enfermedades de Pequenos ˜ Animales, Virología, Dirección de Laboratorios y Control Técnico (DILAB), Servicio Nacional de Sanidad y Calidad Agroalimentaria (SENASA), Buenos Aires, Argentina.; DAMIAN JESUS CASTRO, Sanidad Animal, Estación Experimental Agropecuaria Marcos Juárez, Instituto Nacional de Tecnología Agropecuaria (INTA), Córdoba, Argentina.; GUSTAVO ZIELINSKI, Sanidad Animal, Estación Experimental Agropecuaria Marcos Juárez, Instituto Nacional de Tecnología Agropecuaria (INTA), Córdoba, Argentina. |
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Título : |
Brote de rabia paresiante bovina en la región libre de enfermedad en la Argentina. [Outbreak of bovine paralytic rabies in a disease-free region of Argentina]. |
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Fecha de publicación : |
2020 |
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Fuente / Imprenta : |
Revista Argentina de Microbiologia, Volume 53, Issue 2, Pages 135-140, April?June 2021. OPEN ACCESS. Doi: https://doi-org.proxy.timbo.org.uy/10.1016/j.ram.2020.09.002 |
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DOI : |
10.1016/j.ram.2020.09.002 |
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Idioma : |
Español |
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Notas : |
Article history: Recibido el 14 de enero de 2020 /Aceptado el 2 de septiembre de 2020. /Disponible en Internet el 28 de noviembre de 2020. Autor para correspondencia: Correo electrónico: margineda.carlos@inta.gov.ar (C. Margineda). |
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Contenido : |
Resumen: Reportamos un brote de rabia paresiante bovina en un engorde a corral ubicado en un área libre de esta enfermedad en el sur de Santa Fe, Argentina. Tras manifestar signos neurológicos murieron 6/122 novillos (morbimortalidad = 4,9%), no vacunados. Todos los afectados habían sido transportados desde un establecimiento de Formosa 40-75 días antes del inicio del brote. El examen patológico encefálico de tres novillos reveló gliosis, meningoencefalitis linfoplasmocítica y cuerpos de inclusión intracitoplasmáticos en neuronas; en dos casos hubo detección intralesional de antígeno del virus rábico mediante inmunohistoquímica. Se confirmó la presencia del virus rábico mediante inmunofluorescencia directa en cerebro; se identificó la variante 3a, típica de murciélagos hematófagos, mediante inoculación en ratones seguida de inmunofluorescencia indirecta. Esta es la primera comunicación de rabia paresiante en la llanura pampeana argentina y evidencia que el transporte de bovinos desde áreas endémicas hacia áreas libres podría representar un mecanismo de diseminación de esta enfermedad zoonótica de denuncia obligatoria.
Abstract: We report an outbreak of bovine paralytic rabies in a feed lot in a disease-free area in southern Santa Fe, Argentina. Six of 122 unvaccinated steers died after showing neurological signs (morbimortality = 4.9%) for 24-72 hours, 40-75 days after being transported to the feed lot from a farm located in Formosa. Pathologic examination of the brain in 3 steers revealed gliosis, lymphoplasmacytic meningoencephalitis, and intracytoplasmic inclusion bodies in neurons, along with intralesional detection of the rabies virus antigen by immunohistochemistry in 2 cases. Rabies virus was confirmed by direct immunofluorescence in the brain, and further identified as variant 3a, typical of hematogenous bats, by inoculation in mice followed by indirect immunofluorescence. This represents the first communication of bovine paralytic rabies described in the Pampas plain in Argentina, and evidences that the transport of cattle from endemic to disease-free areas could represent a mechanism of dissemination of this communicable zoonotic disease MenosResumen: Reportamos un brote de rabia paresiante bovina en un engorde a corral ubicado en un área libre de esta enfermedad en el sur de Santa Fe, Argentina. Tras manifestar signos neurológicos murieron 6/122 novillos (morbimortalidad = 4,9%), no vacunados. Todos los afectados habían sido transportados desde un establecimiento de Formosa 40-75 días antes del inicio del brote. El examen patológico encefálico de tres novillos reveló gliosis, meningoencefalitis linfoplasmocítica y cuerpos de inclusión intracitoplasmáticos en neuronas; en dos casos hubo detección intralesional de antígeno del virus rábico mediante inmunohistoquímica. Se confirmó la presencia del virus rábico mediante inmunofluorescencia directa en cerebro; se identificó la variante 3a, típica de murciélagos hematófagos, mediante inoculación en ratones seguida de inmunofluorescencia indirecta. Esta es la primera comunicación de rabia paresiante en la llanura pampeana argentina y evidencia que el transporte de bovinos desde áreas endémicas hacia áreas libres podría representar un mecanismo de diseminación de esta enfermedad zoonótica de denuncia obligatoria.
Abstract: We report an outbreak of bovine paralytic rabies in a feed lot in a disease-free area in southern Santa Fe, Argentina. Six of 122 unvaccinated steers died after showing neurological signs (morbimortality = 4.9%) for 24-72 hours, 40-75 days after being transported to the feed lot from a farm located in Formosa. Pathologic examination of the brain in 3... Presentar Todo |
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Palabras claves : |
BRAIN; CATTLE; CEREBRO; EPIDEMIOLOGIA; EPIDEMIOLOGY; PARALYTIC RABIES; PLATAFORMA DE SALUD ANIMAL; PSA; RABIA PARESIANTE; RABIES VIRUS; VIRUS DE LA RABIA. |
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Thesagro : |
BOVINO. |
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Asunto categoría : |
L73 Enfermedades de los animales |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/15934/1/Revista-Argentina-de-Microbiologia-v.53p.135-140.pdf
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Marc : |
LEADER 03570naa a2200349 a 4500
001 1061565
005 2022-09-05
008 2020 bl uuuu u00u1 u #d
024 7 $a10.1016/j.ram.2020.09.002$2DOI
100 1 $aMARGINEDA, C.
245 $aBrote de rabia paresiante bovina en la región libre de enfermedad en la Argentina. [Outbreak of bovine paralytic rabies in a disease-free region of Argentina].$h[electronic resource]
260 $c2020
500 $aArticle history: Recibido el 14 de enero de 2020 /Aceptado el 2 de septiembre de 2020. /Disponible en Internet el 28 de noviembre de 2020. Autor para correspondencia: Correo electrónico: margineda.carlos@inta.gov.ar (C. Margineda).
520 $aResumen: Reportamos un brote de rabia paresiante bovina en un engorde a corral ubicado en un área libre de esta enfermedad en el sur de Santa Fe, Argentina. Tras manifestar signos neurológicos murieron 6/122 novillos (morbimortalidad = 4,9%), no vacunados. Todos los afectados habían sido transportados desde un establecimiento de Formosa 40-75 días antes del inicio del brote. El examen patológico encefálico de tres novillos reveló gliosis, meningoencefalitis linfoplasmocítica y cuerpos de inclusión intracitoplasmáticos en neuronas; en dos casos hubo detección intralesional de antígeno del virus rábico mediante inmunohistoquímica. Se confirmó la presencia del virus rábico mediante inmunofluorescencia directa en cerebro; se identificó la variante 3a, típica de murciélagos hematófagos, mediante inoculación en ratones seguida de inmunofluorescencia indirecta. Esta es la primera comunicación de rabia paresiante en la llanura pampeana argentina y evidencia que el transporte de bovinos desde áreas endémicas hacia áreas libres podría representar un mecanismo de diseminación de esta enfermedad zoonótica de denuncia obligatoria. Abstract: We report an outbreak of bovine paralytic rabies in a feed lot in a disease-free area in southern Santa Fe, Argentina. Six of 122 unvaccinated steers died after showing neurological signs (morbimortality = 4.9%) for 24-72 hours, 40-75 days after being transported to the feed lot from a farm located in Formosa. Pathologic examination of the brain in 3 steers revealed gliosis, lymphoplasmacytic meningoencephalitis, and intracytoplasmic inclusion bodies in neurons, along with intralesional detection of the rabies virus antigen by immunohistochemistry in 2 cases. Rabies virus was confirmed by direct immunofluorescence in the brain, and further identified as variant 3a, typical of hematogenous bats, by inoculation in mice followed by indirect immunofluorescence. This represents the first communication of bovine paralytic rabies described in the Pampas plain in Argentina, and evidences that the transport of cattle from endemic to disease-free areas could represent a mechanism of dissemination of this communicable zoonotic disease
650 $aBOVINO
653 $aBRAIN
653 $aCATTLE
653 $aCEREBRO
653 $aEPIDEMIOLOGIA
653 $aEPIDEMIOLOGY
653 $aPARALYTIC RABIES
653 $aPLATAFORMA DE SALUD ANIMAL
653 $aPSA
653 $aRABIA PARESIANTE
653 $aRABIES VIRUS
653 $aVIRUS DE LA RABIA
700 1 $aGIANNITTI, F.
700 1 $aLIGUORI, E.
700 1 $aRUSSO, S.
700 1 $aCASTRO, D.J
700 1 $aZIELINSKI, G.
773 $tRevista Argentina de Microbiologia, Volume 53, Issue 2, Pages 135-140, April?June 2021. OPEN ACCESS. Doi: https://doi-org.proxy.timbo.org.uy/10.1016/j.ram.2020.09.002
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