Resumo

L.G, Cooper et al. Dinámica de la transferencia de inmunoglobulina G en el binomio madre-cría de la especie caprina. Rev. vet. [online]. 2014, vol.25, n.2, pp.105-108. ISSN 1669-6840.

The goat placenta prevents the passage of maternal antibodies to fetal circulation so these are transferred via colostrum which must be ingested after birth. The objective of the trial was to establish the kinetics of the concentration of immunoglobulin G (IgG) in goat kids in the first 5 months of life; to relate the concentration of IgG in serum and colostrum of goat with concentration in serum of kid; to evidence differences in the kinetics of IgG concentration of kids regarding litter size. Sixteen Anglo Nubian goats and 26 kids were divided in two groups according to litter size. IgG was measure by single radial immunodiffusion. The concentration of IgG was 1749 mg/dl in serum and 3720 mg/dl in colostrum (p<0.001). In kids at 0 h the values were not detectable, reaching peak at 18 h (1814 mg/dl) with a decrease between 24 h and 60 days (p<0.001). Regarding litter size, it did no influence the concentration of serum IgG and goat colostrum (p 0.77), as well as for the serum kinetics of kids (p 0.48). In conclusion, IgG levels in the kids are kept at a similar concentration of the mothers from 6 h to 150 days. Between 24 h and 60 days there is a reduction in serum IgG compared to the average kinetic obtained. The litter size does not influence the concentration of IgG in goat kids.

Palavras-chave : goat; colostrum; IgG; radial immunodiffusion; litter size.

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