Hanem Khater is the Professor of Parasitology in Benha University, Egypt. She completed her doctoral degree at the Department of Entomology, College of Agriculture, food and Natural resources, University of Missouri- Columbia, USA. Her research mainly focused on natural control of arthropods of medical and veterinary importance such as mosquitoes, house flies, lice, green bottle fly, camel nasal botfly, soft and hard ticks, and mite to avoid environmental pollution with pesticides as well as control of several parasites using safe and natural materials to avoid drug resistances and environmental contamination.


The efficacy of synbiotic (a combination of probiotic and prebiotic) with and without diclazuril on Eimeria acervulina on growth and associated biochemical variables was investigated in broiler chickens. One-day-old chicks were divided into 5 equal groups (Gps) of 30 chicks each. Gp 1, negative control, was not infected and not treated. Chicks of the other groups were directly inoculated intra-crop with 1x105 sporulated oocysts of E. acervulina on the 8th day of age. Gp 2, the positive control, was infected and not treated. Chicks in the remaining groups were given diets mixed with the tested drugs for 6 successive weeks. Gp 3 was fed on a diet mixed with diclazuril (1 ppm). Gp 4 was given a diet mixed with synbiotic (Clostat HC SP Dry®, containing a probiotic, Bacillus subtilis 2x 108 CFU/gm and a prebiotic, Lactose 99.8%) (1 kg/ton feed). Gp 5 was fed on a diet mixed with both diclazuril (1 ppm) and synbiotic (1 kg/ton). Our findings revealed that birds in symbiotic- treated groups, Gps 4 and 5, showed superior reduction in the mean oocyst counts and lesion scores and improved growth and biochemical variables. It was concluded that synbiotic supplementation enhanced growth and production of healthy broilers and could be used as a worthwhile and stand-alone supplement in broiler diets instead of growth promoters and anticoccidial drugs.

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