
Keywords: qPCR; quantitative polymerase chain reaction; ADG; average daily weight gain (from 14 to 35âdays after weaning); F4; Escherichia coli F4; F18; Escherichia coli F18; LI; Lawsonia intracellularis; PILO; Brachyspira pilosicoli; S1; treatment strategy 1; S2