Dietary antibiotic increased (Pb0.05) N and energy digestibility at d 21. Antibiotic
supplemented diets led to a higher (Pb0.05) DM digestibility in pigs at d 42. The coefficient of
apparent total tract digestibility (CATTD) of DM and N was increased (Pb0.05) by HEM treatments
at d 42 compared with non-HEM treatments. The blood lymphocyte concentration in
HEM groups was greater (Pb0.05) than the non-HEM treatments at d 42. Pigs fed HEM supplemented
diets had decreased fecal Escherichia coli concentration (Pb0.05) at the end of the current
study. In conclusion, administration of HEM in weaning pigs diet had no effect on the
growth performance during the whole experiment. However, the beneficial effect on nutrient
digestibilities, lymphocyte and fecal E. coli concentration suggested that those kind of HEM
have a positive role in weaning pigs.