Abstract

The aim of this study was to compare the efficacies of parenteral and oral cobalamin supplementation protocols in dogs with chronic enteropathies and low cobalamin concentrations. It was hypothesised that both treatments would increase serum cobalamin concentrations significantly. Fifty-three dogs with chronic enteropathies and serum cobalamin concentrations<285ng/L (reference interval 244–959ng/L) were enrolled. Dogs were randomised to treatment with either daily oral cobalamin tablets (0.25–1.0mg cyanocobalamin daily according to body weight) or parenteral cobalamin (0.4–1.2mg hydroxycobalamin according to body weight). Serum cobalamin concentrations were analysed 28±5days and 90±15days after initiation of supplementation. After 28 days, all dogs had serum cobalamin concentrations within the reference interval or above. In the parenteral group (n=26), median (range) cobalamin concentrations were 228 (150–285) ng/L at inclusion, 2107 (725–10,009) ng/L after 28days and 877 (188–1267) ng/L after 90 days. In the oral group (n=27), median (range) serum cobalamin concentrations were 245 (150–285) ng/L at inclusion, 975 (564–2385) ng/L after 28days and 1244 (738–4999) ng/L after 90 days. In both groups, there were significant differences in serum cobalamin concentrations between baseline and 28 days, and between 28days and 90days (P<0.001). In conclusion, both parenteral and oral cobalamin supplementation effectively increase serum cobalamin concentrations in dogs with chronic enteropathies and low cobalamin concentrations.

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