Physiology of acid-base balance in bovines with diarrhea backgrounds from Monteria, Colombia

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Autores

César Betancur H Yordan Martínez A Luis Cruz M

Resumen

ABSTRACT

Objective. Evaluate the acid-base balance (ABB) in bovines with diarrheic backgrounds in four areas of Montería, Colombia. Materials and methods. From a total of 300 pregnant cows, 60 were selected with their newborns. A direct inspection was performed of vital signs on the calves and the ABB indicators were determined using a gasometric method. Data were processed by means of descriptive statistics and the Duncan test was used to differentiate between the averages. The degree of association was established between the ABB indicators in cows and calves by using the Pearson correlation and a comparison of proportions was performed on the indexes of the newborns. Results. Regarding the cows, the ABB indicators were found within the reference values; however, in the calves the pH, pCO2, HCO3-, the anion gap (AG) and the bases excess (BE) varied. A correlation was found between AG, BE and metabolic hydrogen ions (M*H). The AG in cows and calves showed notable differences (p<0.05) among the farms in the study. According to the numeric classification system, the suction reflect indicated a greater percentage of calves in group one. Conclusions. The ABB analyte measurement in cows was similar to the consulted reference; however, in calves some analytes did not coincide. This suggests metabolic acidosis in newborn calves due to the increase of AG and the decrease of BE. Additionally, its correlation with M*H opens the possibility of new proposals to determine ABB in bovines.

RESUMEN

Objetivo. Evaluar el equilibrio ácido-básico (EAB) en bovinos con antecedentes diarreicos de cuatro zonas de Montería, Colombia. Materiales y métodos. De un total de 300 vacas preñadas se seleccionaron 60 vacas y sus recién nacidos. Se realizó una inspección directa de los signos vitales en terneros y los indicadores del EAB se determinaron mediante técnica gasométrica. Los datos se procesaron mediante estadística descriptiva y para la diferencia entre medias se empleó la prueba de Duncan. El grado de asociación se estableció entre los indicadores del EAB en vacas y terneros mediante la correlación de Pearson y una comparación de proporciones se realizó en los índices del recién nacido. Resultados. En las vacas, los indicadores del EAB se encontraron dentro de los valores de referencia; sin embargo, en los terneros varió el pH, pCO2, HCO3-, la brecha aniónica (AG) y el excesode bases (EB). Se encontró correlación entre AG, EB e hidrogeniones metabólicos (H+M). El AG envacas y terneros indicó diferencias notables (p<0.05) entre las fincas de estudio. De acuerdo con elsistema de calificación numérica, el signo reflejo de succión indicó el mayor porcentaje de terneros enel grupo uno. Conclusiones. La medición de los analitos del EAB en vacas fue similar a la referenciaconsultada; sin embargo, en terneros no coincidió con algunos analitos. Se sugiere acidosis metabólicaen los terneros recién nacidos por el aumento del AG y descenso del EB, además, su correlación conlos H+M abre la posibilidad de nuevas propuestas para la determinación del EAB en bovinos.

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Referencias

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