مطالعه روند تغييرات OPG در كوكسيديوز تجربي جوجه هاي گوشتي سويه Arbor Acres

Study on OPG changes at Arbor Acres broilers in Experimental Coccidiosis

In order to study and evaluation of production and defecation of Eimerial oocysts in experimental coccidiosis at Arbor Acres broilersn, 20 one-day old male chickens of Arbor Acres strain were chosen and divided accidently into two control and challenge groups. The OPG quantitation test was performed on the chickens feces in both groups on the 10 and 21st days of their breeding period to make sure whether they are infected or not. Then, chickens of challenge group were inuculated with a dosage of 100000 of the mixed oocyst of 4 species including Eimeria maxima, Eimeria tenella, Eimeria acervulina, Eimeria necatrix in 100? solution at the twenty-first day of their breeding period. From the fourth day after Eimerial challenge, samples of the chickens feces were taken from their cages for 10 consecutive days. The number of oocysts were quantitateded by Mac master method. The OPG was zero for the control group on all days of sampling such as we expected, which is indicative of the appropriate qualitative control of the experiment process. In the challenge group,we see increasing process of OPG in days of 4-7 post challenging and the pick level of OPG was seen at seventh day after challenging.From day8 to 9, decreasing of OPG was happened, this decreasing continue with mild,fast and mild process to day of 13, respectively. Vet. Res. Bull. 6,2:149- 153, 2011. Keywords: ArborAcres, Experimental coccidiosis, OPG, Broilers.