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Archivos de medicina veterinaria

versión impresa ISSN 0301-732X


OLMOS-HERNANDEZ, A et al. Porcine recombinant somatotropin administered to piglets during the first week of life: effects on metabolic and somatometric variables. Arch. med. vet. [online]. 2010, vol.42, n.2, pp.93-99. ISSN 0301-732X.

The aim of this study was to evaluate the effect of porcine recombinant somatotropin (rpST) administered to piglets during their first week of life, on metabolic and somatometric variables. A total of 220 piglets born from 40 hybrid Landrace x Large White sows were used. Piglets were randomly assigned to either Group 1 (G1, Control, n = 106) or Group 2 (G2, rpST treatment, n = 114). The rpST dose was 1mg/kg every 24h during 7 consecutive days. Serum pH at birth showed significant differences between groups (7.42 ± 0.47 and 7.31 ± 0.59), although this difference dissapeared on day 8. There was a significant increase (P < 0,001) in plasma glucose levels for the treated group on day 8 (68.78 ± 10.44 and 103.71 ± 18.44). Average daily weight gain was also higher for the somatotropin treated group compared to the control (137.25 ± 31.31 and 209.21 ± 45.97). Comparisons for interaction between treatment and sex showed dramatic differences (P < 0,001) for glucose, lactate and weight gain for the males from G2 when compared to the females from the same experimental group on day 7 post-treatment. Piglets treated with rpST showed significant differences in abdominal perimeter (28.67 ± 4.41 and 31.79 ± 3.74), dorsal length (28.42 ± 2.66 and 30.21 ± 4.70), and ham roundness (18.79 ± 2.62 and 22.38 ± 2.98). There is an ongoing research that will allow to determine the composition of body mass (bone or muscle) in the treated piglets.

Palabras clave : porcine recombinant somatotropin; piglet; neonatal vitality; weight.

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