Document Type : Research Paper

Authors

Abstract

This study aimed to investigate the genetic resistance of different sheep breeds against coccidiosis, as well as, parasitic effects of chemical medicines and tannins on its treatment. Thirty-six single replacement ram lambs belonged to the ewes at the 2nd parity from Baluchi, Iran Black and Arman breeds, at the age of 8-9 month and average weight of 30±6(Kg) were selected and examined for 60 days. This study was conducted in a 2×3 factorial completely random designed with 6 treatments and replicates. Feeding was based on standards of Iran’s organic ISO11000 and diets were balanced according to NRC1985. On the 10th day of this experiment for 3 days, commercial tannin was added to the first diet at a rate of 1.6 g/Kg of body weight, as well as, 5 g of anti-coccidiosis medicine amprolium200 per each 20 kg for the second diet. Serum protein and albumin, hemoglobin and PCV blood, as well as, fecal OPG levels was recorded. There was no mortality during the experiment. The results showed the amount of fecal OPG were affected by time duration and medicine, so that, medicine had much effect rather than tannin type (P<0.01). Although time series were significant, none of parameters affected by breed(P<0.01). This study shows there is no significant effect among different breeds regarding to genetic resistance. On the other hand, regarding to the effect of tannin on reducing the amount of Eimeria and level of contamination, it can be considered as a substitution for chemical medicine in organic rearing systems.

Keywords

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