CONCENTRACIÓN SÉRICA DE PROTEÍNAS E INMUNOGLOBULINAS EN CABRITOS DE BIOTIPO CRIOLLO

ALLEGRETTI, L.; PAEZ, S.; GRILLI, D.; EGEA, V.; CANDELA, L.; SBRIGLIO, L.; COBOS, E.; ROSS, L.; ARENAS, N.

Ciudad de la Punta, San Luis, Argentina.

Jornada; XXVII Reunión Cientifica Anual de la Sociedad de Biología de Cuyo; 2009

Sociedad de Biología de Cuyo- Universidad Nacional de San Luis

In the early postpartum period, serum immunoglobulin levels depend on the intake of antibody-rich colostrum. During this period serum immunoglobulins ensure immunological protection against infectious diseases until the kid goats can actively produce their own antibodies. The aim of this study was to estimate the age from which the kid’s immune system develops. 5 single-birth kid goats suckled their dams until weaning at 42 days. Blood samples were taken from birth to 135 days of age. Colorimetric Biuret test was used for determination of serum total protein (TP) and electrophoresis using cellulose acetate strips for immunoglobulin (Ig) determination. The correlation coefficient between TP and Ig was 0.85 (p <0.01). Ig reached their peak (2.47 g dL-1) at 48 hours postpartum. The lowest concentrations of TP and Ig (5.27 and 1.84 g dL-1) were observed at weaning (42 days). Then TP and Ig increased progressively up to 64 days (6.28 and 2.31 g dL-1) and remained constant from 85 to 135 days (6.09 and 2.18 g dL-1). Since changes in TP concentration were parallel to those observed in Ig levels, the concentration of TP might be used to estimate postpartum transfer of passive immunity. The progressive rise in levels of Ig after weaning could indicate the time at which the kids begin to produce their own antibodies.