Caecal Bacterial Concentrations in Turkey Hens Fed Corn or Wheat Based Diets With and Without Supple-

s of papers 17 of E. maxima at the gut level by measuring plasma carotenoid concentrations. Ionophore sensitivity profiles of eight E. maxima field strains were determined using the traditional evaluation of efficacy parameters, including: lesion scores, weight gain and feed conversion. The results demonstrated that Avatec-medicated, infected chickens had a significant (P<.05) improvement in carotenoid concentrations when compared to infected, non-medicated controls (INC’s). In the sensitivity trials all six ionophores yielded significantly (P<.05) lower lesion scores, as compared with the INC’s. The Avatec regimen, however, resulted in a significant improvement of the three assessment parameters, relative to the same from the other five ionophore treatments.