The biology behind S.E.W. is very simple. S.E.W. stops the transmission of
pathogens that do not cross the placenta. The transfer of colostral
immunity from the sow protects the piglets from infection. Sows are
vaccinated with antigens that stimulate colostral immunity. The colostral
immunity given by the sow lasts for approximately 9 days before levels of
antibodies drop very rapidly, making the piglets susceptible to infection
by any disease the sow has or other pigs have in the barn. The piglets
generate their own immunity at two weeks of age. Between day 9 and day 15,
the piglets are unprotected, and can be heavily infected with disease.
Early weaning at 10 - 12 days prevents the pigs from infection, while
colostral immunity is still at guard.
The success of the S.E.W. system depends on the weaning age. Weaning at
ten days of age has been proven to eliminate Enzootic Pneumonia, Atrophic
Rhinitis, Pasteurella Multocida, Mycoplasmal Pneumonia, and Porcine
Reproductive and Respiratory Syndrome (P.R.R.S.) Weaning at 21 days of age
will eliminate Pseudorabies infection, Swine Dysentery, Transmissable
Gastro Enteritis (TGE), and Actinobacillus Pleuropneumoniae (A.P.P.).
Using S.E.W. increases the performance in the Grower/Finisher herd. These
pigs are healthier and will use their energy towards growing and not
towards fighting infectious disease. With less disease, there is also less
money spent on medication. Not only does S.E.W. improve health, but
weaning at an earlier age will increase the number of litters born per
year, and the help maintain the sows' body condition after weaning.
|