Pre-farrowing pregnant sow piglet colibacillosis vaccines and process for their administration to pregnant sows before farrowing

摘要

Piglet colibacillosis vaccine for intramuscular or subcutaneous administration to pregnant sows comprising cell-free heat labile (LT) E. coli enterotoxin with an adjuvant and the method for preventing piglet colibacillosis consisting in administering said vaccine to pregnant sows from 3 to 6 weeks before farrowing.