... carried gens encoding F4-pili determined by PCR and at least one of the enterotoxin gens (LT/STa/STb) determined by multiplex PCR. The treatment dose of yolk product KT04 for the abovementioned ... 640 in Ab-ELISA. The objectives were the post-weaning piglets that have diarhea in the real field, where there was at least 11/30 (36,67 %) fecal sample bearing heamographic colonies, of which ... combination) have curable effect specifically to the diarrhea due to E. coli in post-weaning piglets. The results in this study put forward the potentiality for the development of specific treatment bio-products...