Evaluation of anti-coccidial vaccines and coccidiostate drugs on growth performance in experimental coccidiosis of broiler chickens

The present study was designed to compare the effect of coccidiostate drugs and cocccidial vaccines on performance of coccidian-infected broiler chickens. Nine hundred and sixty one-day-old broiler chicks from the Ross strain were randomly divided to eight treatment groups that each group contained 3 replicates. The birds of group 1 as negative control and group 2 as positive control did not receive any medicines or vaccines. Treatments 3 and 4 fed diets supplemented with Salinomycine and Diclazoril respectively, but did not immunize. The chickens of groups 5 to 8 immunized with coccidial vaccines (Livacox Q, Paracox 5, Livacox T and Iracoc respectively) by drinking water on day 5 of age. Chicks in treatments 2 to 8 were inoculated with a suspension containing four Eimeria species of 26 days of age. Surveillances for coccidian oocysts of feces samples were carried out from 7 to 13 days of post-challenged. Body weight and feed conversion ratios were determined weekly. Our data indicated that using coccidial vaccines and coccidiostate drugs decreased OPG of feces. The highest mean of body weight was related to the chickens treated with Salinimycine. The lowest feed conversion ratio was related to negative control groups. It could be indicated that coccidial vaccines and coccidiostate medicines could decline OPG and improve growth performance of broiler chickens.