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  • Title: Influence of D-lactate on metabolic acidosis and on prognosis in neonatal calves with diarrhoea.
    Author: Lorenz I.
    Journal: J Vet Med A Physiol Pathol Clin Med; 2004 Dec; 51(9-10):425-8. PubMed ID: 15610486.
    Abstract:
    Three hundred bucket-fed diarrhoeic calves up to the age of 21 days were used to investigate the degree in which D-lactic acid contributes to metabolic acidosis in bucket-fed calves with naturally acquired neonatal diarrhoea. Fifty-five percent of all diarrhoeic calves had serum D-lactate concentrations higher than 3 mmol/l. Mean (+/-SD) D-lactate values were 5.7 mmol/l (+/-5.3, median: 4.1 mmol/l). D-lactate values were distributed over the entire range of detected values from 0 to 17.8 mmol/l in calves with base excess of -10 to -25 mmol/l. Serum D-lactate concentration was higher in patients with ruminal acidosis (6.6 +/- 5.2 mmol/l; median: 5.9 mmol/l) than in those with physiological rumen pH (5.3 +/- 5.4 mmol/l; median: 3.7 mmol/l). There was no evidence of a correlation (r = 0.051) between the serum levels of D-lactate and creatinine (as an indicator of dehydration). D-lactate was correlated significantly with both base excess (r = -0.685) and anion gap (r = 0.647). The proportion of cured patients was not significantly different between the groups with elevated (>3 mmol/l) and normal serum D-lactate concentrations. This study shows that hyper-D-lactataemia occurs frequently in diarrhoeic calves, has no impact on prognosis but may contribute to the clinical picture associated with metabolic acidosis in these animals.
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