1994, Number 3
Vet Mex 1994; 25 (3)
López RM, Fragoso SH, Rojas RE, Trejo CL, Sánchez AA, Giles HI, Quiroz RH, Anzurez KC
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ABSTRACTIn order to compare the vaccine efficiency with Eimeria tenella, E. necatrix, E. acervulina and E. maxima against the narazine ionofore in the feed for coccidiosis prevention, 320 chickens were divided in four groups. Every group had four repetitions with 20 chickens each. Group A was treated with the vaccine in the feed without coccidiostatic; group B was treated with feed plus narazine, group C was treated without narazine in the feed and group D was the control. Three weeks afterwards, Groups B and C were challenged to a mixed inoculum composed by E. tenella, E. necatrix, E. acervulina and E. maxima. Results showed significant differences like weight gain and feeding convertion in chickens aged 0-4 weeks. The best weight gain was obtained in group D, followed by groups A, B and C, respectively. Feeding convertion was analyzed in chicken aged 4-7 and 0-7 weeks, and it did not show statistical differences. The anticoccidial index was good in group A, regular in group B and bad in group C. This indicates that the vaccine provided with a suitable protection against poultry coccidiosis.