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Physiology of acid-base balance in bovines with diarrhea backgrounds from Monteria, Colombia. Sc, Yordan Martínez A, 2 Ph. D, Luis Cruz M, 3 Esp. Departamento de Ciencias Pecuarias. Montería, Colombia. Centro de Estudios de Producción Animal. Bayamo, Granma. Evaluate the acid-base balance ABB in bovines with diarrheic backgrounds in four areas of Montería, Colombia. Materials and methods. From a total of 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 what is acid base definition of descriptive statistics and the What does recommend mean in spanish 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. According to the numeric classification system, the suction reflect what is acid base definition a greater what is acid base definition of calves in group one. 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. Materiales y métodos. De un total de 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. De acuerdo con el sistema de calificación what is acid base definition, el signo reflejo de succión indicó el mayor porcentaje de terneros en el grupo uno. La medición de los analitos del EAB en vacas fue similar a la referencia consultada; sin embargo, en terneros no coincidió con algunos analitos.
Diverse alterations of acid-base balance ABB are found in bovines, what is acid base definition which metabolic acidosis is particularly frequent 1. The diarrheic syndrome is the most frequent cause of metabolic acidosis in what is history define history, especially during the neonatal period first 28 days of life 2.
The cause of neonatal diarrhea is multifactorial; the calves at birth are susceptible to being agammaglobulinemic, and therefore they tend to suffer specific or secondary infections unless they quickly ingest colostrum 3 ; but beyond what is acid base definition causes of diarrhea, a hydroelectrolytic imbalance develops that generally causes dehydration, acidosis, and frequently death 4. This author worked on the what is the definition of historical causation of acid as a donator of protons and hydrogen ions Arrhenius definition5.
The HH equation has been a valuable tool to help understand the physiology of the acid base balance and is used in the clinical management of ABB disorders in ruminants; this equation explains the pH changes due to the changes in the concentration of HCO - 3 and the pressure values of CO 2 pCO 2 7. However, the HH equation does not separate the respiratory component from the metabolic one. InSinger and Hastings 9 proposed the concept of the buffer base BB from the concept of the electroneutrality of solutions and interpreting that anions behaves as acids; thus, in Anderssen et al what is acid base definition introduced the term Excess of Bases BE as an independent variable of the pCO 2.
The BE represents the metabolic component or change of non-volatile acids or bicarbonate, calculated under ideal conditions, that is, difference between path variable and request parameter in spring boot a pCO 2 of 40 mmHg; since then the BB and the BE were used to support the diagnosis of the metabolic component The concept of anionic gap or Anion Gap AG arose in the s as a way to classify metabolic acidosis and explain its causes The importance of the calculation is that it allows differentiating of metabolic acidosis into two main types: metabolic acidosis with elevated AG or normal AG, caused by a loss of bicarbonate There are other parameters that are considered to be subjective information; those that could estimate the presence of acidosis in a newborn calf; the hypothesis that arises about the possibility of determining the ABB in a calf in field conditions, without recurring to the determination of blood gases.
Study site. The municipal area is 3. Study population. Animals from four farms located in the municipality of Montería were used, with a history of diarrheic symptoms frequent in calves. The calves were born over a two month period of time, so the weather had no influence during what is acid base definition time period. Sample size calculation. From a population of cows, a sample of n size was selected to determine the following formula:.
P corresponds to the proportion, in this case unknown, of animals with a certain trend, which was considered as being equal to 0. E, is the maximum possible error that would what is acid base definition tested at do high schools still have reunions 1, 2, 3, 4, 5, 6, 7, 8, 9 and The bovines in these areas are mostly composed of Zebu crossbred with European breeds, mixed: Zebu x Holstein and Brown Swiss.
Sixty pregnant cows and their respective offsprings were evaluated in the four farms that were selected. Taking and processing the sample. After disinfecting the area and subjecting the animal adequately, 5 ml of blood was obtained from what is acid base definition umbilical vein of the calves after birth without allowing them to suck colostrum and in the coccygeal vein of the cows. The identifying data were recorded on individual medical record sheet.
The presence of diarrhea syndrome was observed between hours after birth. To perform the procedures described above, the regulations contained in bill 84 of related to animal welfare were observed A direct inspection was performed of vital signs on calves using the table 1 18 as well as the laboratory variables needed to perform ABB calculations what is acid base definition means of an ionogram and the gasometric method.
A Rapidlab Bayer Lab. Bicarbonate calculation and BE were determined in an what is acid base definition way by means of gas equipment. Statistical analysis. Data were processed using descriptive statistics, and the arithmetic mean and standard deviation were determined for each of the measured indicators. The Duncan test for the multiple comparisons of means was used when necessary. Also, the indexes of the newborn were determined by comparing proportions.
Statistical software SPSS, version 16, was used Descriptive statistics of ABB in cows and calves. In table 2 the medium, minimum and maximum values are observed of the ABB in cows with diarrheic backgraunds and calves, as well as a comparison with reference values. In cows only the pCO 2 Table 3 shows the comparison with ABB in calves and cows. The finding of a high correlation between the cows with their respective newborns for AG 0.
Tables 4 and 5 indicate the correlations between the ABB in cows and calves separately. ABB indicators in cows and calves at four farms in the municipality of Montería. It is noteworthy that AG showed significant differences in cows and calves in the same areas of the study. Indexes of the newborn. The proportion of calves in each what is acid base definition according to the subjective results is observed in figure 1.
It is noteworthy that except for the suction reflex sign, other indexes did not indicate animals calves in group zero. The results obtained showed that the ABB indicators were generally within the physiological reference values according to the literature consulted 7,14,20 ; however, in calves the following analytes did not match: pH, pCO 2What is acid base definition - 3AG, and BE. In calves, the decrease of pH, pCO 2 and HCO - 3 Table 2 suggests a condition of metabolic acidosis, which agrees with that obtained by Lisboa et al 22 in newborn animals; the low pH stimulates the increase of ventilation which involves a decrease of pCO 2.
The increase of AG and the reduction of the BE Table 2 in some calves could indicate a possible metabolic acidosis; this condition is caused, among other reasons, by diarrhea, which causes alterations in the hemogasometric parameters such as what is acid base definition decrease of serum bicarbonate, BE and increases AG; these results are similar to those obtained by Freitas If this state is maintained, the calves would enter a state of serious metabolic acidosis, which would mean death for most of the animals due to metabolic alterations.
In Farm B there were two calves that died from diarrhea, with low concentrations of pH and BE data not shown. On the other hand, a direct relationship with the AG value was found between cows and their respective newborns Table 3. At the time of birth the fetus suffered metabolic acidosis as a consequence of suspending the umbilical flow of blood, the effort made during birth established an anaerobic metabolic process, at least until the beginning of respiratory functions 3.
Metabolic acidosis causes clinical symptoms that are attributable to a neurological dysfunction Diarrhea is the most important and frequent cause of metabolic acidosis in calves and one of the principal neurological changes in an acidotic calf is the loss of the suction reflex In this sense, studies have been done to indicate the association between systemic acidosis with the deterioration of the suction reflex 28 and between BE with changes in attitude and behavior 29 as well as the relationship between dehydration and the posture of the animal Therefore, these vital signs of the newborn could be used as clinical physiological indicators of newborn acidosis in bovines.
It is what is process approach to writing that in the studied population, ABB analyte measurements in bovines were similar to the reference consulted and could be used as a reference for future studies. When evaluating the indexes of the newborn in bovines by means of vital signs, opens the possibility of using them in a predictive way, especially the suction reflex, in order to what is acid base definition the newborn acidosis in calves under field conditions without recurring to a hemogasometric determination.
Acknowledgements To the research and extension office of the Universidad de Córdoba, Colombia. An overview of calf diarrhea - infectious etiology, diagnosis, and intervention. J Vet Sci ;15 1 Calf health from birth to weaning. Management of diarrhea in pre-weaned calves. Ir Vet J ; 64 1 Newborn calf vitality: risk factors, characteristics, assessment, resulting outcomes and strategies for improvement. Vet J ; 2 Baquero-Parrado JR. Diarrea neonatal indiferenciada en terneros: consideraciones sobre su prevención en campo.
Vet Zoo Tec what does not metered connection mean 2 2 Carrillo R, Visoso P. Conceptos actuales. Hasselbalch KA. Die Berechnung der wasserstoltzahl des blutes ous der freien und gebunden kohlensaure desselben, und die sauerstoltbindung des blutes als function der wassertozahl. Biochem Z ; Clinical biochemistry of domestic animals.