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Bulletin No. 26 - Fall 2006
VirologyPMWS-PCV2-PCVD-PDNS
LE DIVIDICH J, CARIOLET R, BLANCHARD P, BLEUNVEN E, LE COZLER Y
Teneur du colostrum en IgG et titres d'anticorps PCV2: incidence du sevrage à 7 jours sur l'immunité des porcelets [Immunoglobulin G content and circovirus type 2 titres in sow colostrum: effect of weaning at 7 days of age on piglets im
Journées Recherche Porcine, 38, 2006, 347-352
The objective of this study was to compare the immune status of two populations of piglets born of the same dams, half of them being weaned at 7 days of age and the other half at 28 days, by determining the immunoglobulin G (IgG) content and PCV2 antibody titers in colostrum and serum samples. The results show that early weaning had no effect on the immune status of piglets. Among the sows included in this study, two resulted negative for PCV2 antibodies, suggesting that within a naturally infected herd both PCV2 negative and positive sows and offsprings can coexist. Moreover, the positive correlation observed between passive immunity levels at 48 hours of age and PCV2 antibody titers from 28 days of age is noteworthy since it underlines the importance of a proper and homogenous colostrum intake of the offspring for the control of PMWS. In order to limit the circulation of PCV2, piglets should take both the colostrum of their mother and that of the adoptive mother. As a consequence, adoptions should be done within the 24 hours of life of the piglets.
