\r\n\t\t\t\r\n\t\t\tFigura 1. Los bovinos presentan placenta cotiledonaria (Lezcano, 2017). <\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n<\/table>\r\n<\/div>\r\n\r\n\r\n
Debido al tipo de placenta de los rumiantes, no se lleva a cabo el paso de inmunoglobulinas de la sangre materna hacia el feto, por lo que el recién nacido es agammaglobulinémico al parto; es decir tiene niveles muy bajos de proteínas protectoras del sistema inmunitario llamadas inmunoglobulinas.<\/span><\/p>\r\n\r\nLas primeras horas de vida están marcadas por un paso no selectivo de macromoléculas y transporte a través del intestino delgado, por lo que la entrada de virus y bacterias puede darse sin dificultades. Por esto, la ingestión de calostro es de suma importancia para el recién nacido porque es especialmente rico en Ig o anticuerpos, los cuáles proveen al becerro protección inmunológica y estimulación del desarrollo del tracto gastrointestinal durante las primeras semanas de vida.<\/span><\/p>\r\n\r\nLas enfermedades que causan diarrea son las más importantes en el recién nacido, siendo responsables de las mayores pérdidas económicas que cualquier otra enfermedad en becerros. El periodo de mayor riesgo es el que va desde el nacimiento hasta aproximadamente un mes de edad. La condición ocurre tanto en hatos lecheros como en productores de carne y representa una limitante en la producción. En el cuadro 1 se muestran los agentes etiológicos potenciales de la diarrea en becerros.<\/span><\/p>\r\n\r\nLos becerros afectados presentan diarrea severa, la cual lleva a una deshidratación, desbalance electrolítico y acidosis. Si el pronóstico es favorable, los becerros afectados nunca alcanzan a desarrollar su máximo potencial genético.<\/span><\/p>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n\r\n
\r\n
\r\n
En becerros con diarrea aguda, existe una pérdida de iones de sodio y agua, bicarbonato, cloro y potasio hacia los intestinos y subsecuentemente hacia las heces.<\/span><\/p>\r\n\r\nEstas pérdidas tienen consecuencias en grados diferentes de deshidratación, hipovolemia disminución del volumen total de sangre que circula en el organismo), acidosis metabólica, hiponatremia (niveles bajos sodio) e hipocloremia (deficiencia del cloro en el líquido extracelular).<\/span><\/p>\r\n\r\nMecanismos de la diarrea<\/span><\/strong><\/h4>\r\n\r\n\r\n\tHipermotilidad del intestino<\/span><\/li>\r\n\tPermeabilidad aumentada del intestino<\/span><\/li>\r\n\tHipersecreción intestinal<\/span><\/li>\r\n\tMala absorción intestinal<\/span><\/li>\r\n<\/ul>\r\n\r\n <\/p>\r\n<\/div>\r\n\r\n
<\/div>\r\n<\/div>\r\n\r\n
\r\n
<\/div>\r\n\r\n
\r\n
\r\n\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t <\/strong><\/span>Cuadro 1. Factores etiológicos potenciales de diarrea en becerros (Olguín, 2003).<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t\t\r\n\t\t\t\r\n\t\t\tFactor<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t\t\r\n\t\t\tDescripción<\/span><\/strong><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t\t\r\n\t\t\t\r\n\t\t\tBacterias<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t\t\r\n\t\t\tE. coli, Salmonella, Clostridium perfringens<\/em> tipo C<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t\t\r\n\t\t\t\r\n\t\t\tProtozoarios<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t\t\r\n\t\t\tCoccidia, Eimeria surni, E. bovis<\/em> y Cryptosporidia<\/em><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t\t\r\n\t\t\t\r\n\t\t\tHongos<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t\t\r\n\t\t\tCandida albicans<\/em>.<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t\t\r\n\t\t\t\r\n\t\t\tVirus<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t\t\r\n\t\t\tRotavirus, Coronavirus, Parvovirus, Diarrea Viral Bovina, Rinotraqueítis Infecciosa Bovina<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t\t\r\n\t\t\t\r\n\t\t\tDietarias<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t\t\r\n\t\t\tSobrealimentación, administración de substitutos de leche con proteína poco digestible para el becerro.<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n<\/table>\r\n<\/div>\r\n\r\n <\/div>\r\n<\/div>\r\n\r\n
\r\n
\r\n
Deshidratación <\/strong><\/span><\/h4>\r\n\r\nLa deshidratación juega un papel muy importante ya que sin importar el agente etiológico, la diarrea y el desbalance electrolítico son las principales causas de muerte.<\/span><\/p>\r\n\r\nUn becerro sano presenta un estado de balance fisiológico con respecto al agua y electrólitos, perdiendo algo en las heces, orina y otras secreciones para balancear lo ingerido en la dieta. En un becerro con diarrea, el agua perdida en las heces es mucho mayor. Los signos de deshidratación se muestran en el Cuadro 2.<\/span><\/p>\r\n\r\nTratamiento y prevención<\/strong><\/span><\/h4>\r\n\r\nEl tratamiento se basa en terapia de líquidos por las consecuencias que puede tener la deshidratación así como el uso de antibioterapia una vez que sea conocido el agente etiológico. Se deben identificar los factores relacionados con el manejo, nutrición e higiene para minimizar la presencia de agentes etiológicos.<\/span><\/p>\r\n\r\nLa clave es mantener un buen nivel nutricional, adecuado consumo de calostro y aumentar la resistencia de los neonatos mediante la vacunación de las hembras gestantes de 30 a 60 días antes del parto para incrementar la concentración de anticuerpos en el calostro contra patógenos entéricos.<\/span><\/p>\r\n<\/div>\r\n\r\n \r\n
\r\n\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t Cuadro 2. Signos de deshidratación (Olguín, 2003).<\/span><\/strong><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t\t\r\n\t\t\t\r\n\t\t\tSignos<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t\t\r\n\t\t\tPorcentaje de deshidratación<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t\t\r\n\t\t\t\r\n\t\t\tInaparente<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t\t\r\n\t\t\t<5 %<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t\t\r\n\t\t\t\r\n\t\t\tOjos hundidos<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t\t\r\n\t\t\t6-7 %<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t\t\r\n\t\t\t\r\n\t\t\tDepresión, membranas mucosas secas<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t\t\r\n\t\t\t8-10%<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t\t\r\n\t\t\t\r\n\t\t\tPostración, extremidades frías, pulso débil<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t\t\r\n\t\t\t11-12%<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t\t\r\n\t\t\t\r\n\t\t\tSignos nerviosos, muerte<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t\t\r\n\t\t\t>12%<\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n
\r\n
Cita correcta de este artículo<\/strong><\/span><\/h4>\r\n\r\nINTAGRI. 2020. Diarrea en becerros. Ganadería. Serie Ganadería, Núm. 44. Artículos técnicos de INTAGRI. México. 4 p.<\/span><\/p>\r\n\r\nFuentes Consultadas<\/strong><\/span><\/h4>\r\n\r\n\r\n\tBovine Veterinary Forum. Focus: Calf Immunology. Bovine Veterinary Forum. 9, 1: 1994.<\/span><\/li>\r\n\tDaugschies; Najdrowski, M. 2005. Eimeriosis in Cattle: Current Understanding. J. Vet. Med. 52: 417–427.<\/span><\/li>\r\n\tGodden, S. 2007. Colostrum management for dairy calves. Proceedings from the conference Calf Management Steinkjer, Norway. Pp7-14.<\/span><\/li>\r\n\tOlguín y Bernal Arturo. 2003. Síndrome diarreico neonatal. Clínica de Bovinos. Facultad de Medicina Veterinaria y Zootecnia. UNAM.<\/span><\/li>\r\n<\/ul>\r\n<\/div>\r\n\r\n\r\n
\r\n\t\r\n\t\t\r\n\t\t\t\r\n\t\t\tFigura 3. El suministro de electrolitos y terapia de líquidos es importante para un tratamiento exitoso de la diarrea (Del Cura, 2009).<\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n<\/table>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\nContinuar leyendo<\/button><\/center>\r\n\r\n","has_cost":0,"creation":"2020-05-05 09:05:00","updated":"2020-05-05 10:39:31","published":"2020-04-25 16:59:46","cost":0,"badge":"mxn"},"availPoints":0,"articleCosts":[],"conversion":[0.004400000000000000265065747129256124026142060756683349609375,1,5634,19],"guest":true,"countries":[{"country_ID":1,"name":"Argentina","iso2":"ar","badge":"USD","conversion":19},{"country_ID":2,"name":"Belice","iso2":"bz","badge":"USD","conversion":19},{"country_ID":3,"name":"Bolivia","iso2":"bo","badge":"USD","conversion":19},{"country_ID":4,"name":"Canada","iso2":"ca","badge":"USD","conversion":19},{"country_ID":5,"name":"Chile","iso2":"cl","badge":"USD","conversion":19},{"country_ID":6,"name":"Colombia","iso2":"co","badge":"COP","conversion":0.004400000000000000265065747129256124026142060756683349609375},{"country_ID":7,"name":"Costa Rica","iso2":"cr","badge":"USD","conversion":19},{"country_ID":8,"name":"Cuba","iso2":"cu","badge":"USD","conversion":19},{"country_ID":9,"name":"Ecuador","iso2":"ec","badge":"USD","conversion":19},{"country_ID":10,"name":"El Salvador","iso2":"sv","badge":"USD","conversion":19},{"country_ID":11,"name":"Estados Unidos","iso2":"us","badge":"USD","conversion":19},{"country_ID":12,"name":"Guatemala","iso2":"gt","badge":"USD","conversion":19},{"country_ID":13,"name":"Guyana","iso2":"gy","badge":"USD","conversion":19},{"country_ID":14,"name":"Guayana Francesa","iso2":"gf","badge":"USD","conversion":19},{"country_ID":15,"name":"Honduras","iso2":"hn","badge":"USD","conversion":19},{"country_ID":16,"name":"México","iso2":"mx","badge":"MXN","conversion":1},{"country_ID":17,"name":"Nicaragua","iso2":"ni","badge":"USD","conversion":19},{"country_ID":18,"name":"Panamá","iso2":"pa","badge":"USD","conversion":19},{"country_ID":19,"name":"Paraguay","iso2":"py","badge":"USD","conversion":19},{"country_ID":20,"name":"Perú","iso2":"pe","badge":"PEN","conversion":5634},{"country_ID":21,"name":"Puerto Rico","iso2":"pr","badge":"USD","conversion":19},{"country_ID":22,"name":"Rep. 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El síndrome diarreico neonatal provoca muertes y es considerado como la principal causa de pérdidas en los becerros. Debido a esto se sugieren medidas de prevención tales como la ingesta de calostro en las primeras horas de vida, buenas prácticas de manejo y vacunación de vacas y vaquillas gestantes.","fb_desc":"","thumb":"\/assets\/images\/articulos\/categoria1\/ganaderia\/art44-diarrea-becerros\/becerros.jpg","fb_thumb":"","category":18,"related":"","keywords":"diarrea neonatal, síndrome diarreico, deshidratación, becerro, becerros, diarrea","pdfLink":"Articulos\/Ganaderia\/44. Diarrea en becerros.pdf","text":"\r\n
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Autor: Equipo Editorial INTAGRI<\/em><\/strong><\/span><\/p>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n
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El sistema inmunológico en el bovino recién nacido no está desarrollado completamente, por lo cual el becerro es altamente susceptible a una cantidad numerosa de patógenos, lo que provoca muertes en esta etapa.<\/span><\/p>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n
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\r\n\t\r\n\t\t\r\n\t\t\t\r\n\t\t\tFigura 1. Los bovinos presentan placenta cotiledonaria (Lezcano, 2017). <\/strong><\/span><\/p>\r\n\t\t\t<\/td>\r\n\t\t<\/tr>\r\n\t<\/tbody>\r\n<\/table>\r\n<\/div>\r\n\r\n\r\n
Debido al tipo de placenta de los rumiantes, no se lleva a cabo el paso de inmunoglobulinas de la sangre materna hacia el feto, por lo que el recién nacido es agammaglobulinémico al parto; es decir tiene niveles muy bajos de proteínas protectoras del sistema inmunitario llamadas inmunoglobulinas.<\/span><\/p>\r\n\r\nLas primeras horas de vida están marcadas por un paso no selectivo de macromoléculas y transporte a través del intestino delgado, por lo que la entrada de virus y bacterias puede darse sin dificultades. Por esto, la ingestión de calostro es de suma importancia para el recién nacido porque es especialmente rico en Ig o anticuerpos, los cuáles proveen al becerro protección inmunológica y estimulación del desarrollo del tracto gastrointestinal durante las primeras semanas de vida.<\/span><\/p>\r\n\r\nLas enfermedades que causan diarrea son las más importantes en el recién nacido, siendo responsables de las mayores pérdidas económicas que cualquier otra enfermedad en becerros. El periodo de mayor riesgo es el que va desde el nacimiento hasta aproximadamente un mes de edad. La condición ocurre tanto en hatos lecheros como en productores de carne y representa una limitante en la producción. En el cuadro 1 se muestran los agentes etiológicos potenciales de la diarrea en becerros.<\/span><\/p>\r\n\r\nLos becerros afectados presentan diarrea severa, la cual lleva a una deshidratación, desbalance electrolítico y acidosis. Si el pronóstico es favorable, los becerros afectados nunca alcanzan a desarrollar su máximo potencial genético.<\/span><\/p>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n\r\n
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En becerros con diarrea aguda, existe una pérdida de iones de sodio y agua, bicarbonato, cloro y potasio hacia los intestinos y subsecuentemente hacia las heces.<\/span><\/p>\r\n\r\nEstas pérdidas tienen consecuencias en grados diferentes de deshidratación, hipovolemia disminución del volumen total de sangre que circula en el organismo), acidosis metabólica, hiponatremia (niveles bajos sodio) e hipocloremia (deficiencia del cloro en el líquido extracelular).<\/span><\/p>\r\n\r\nMecanismos de la diarrea<\/span><\/strong><\/h4>\r\n\r\n