Impact of Plant Extracts on Zootechnical, Microbiological and Biochemical Parameters of Broiler Chicken of the Cobbs 500 Breed (Gallus gallusdomesticus)

The use of antimicrobials in animal production has promoted resistance of microorganisms, transmissible to humans, thus compromising any treatment of pathologies resulting. The aims of this study is to contribute to the fight against the proliferation of avian pathogens resistant to antibiotics, by the use of plant extracts in broiler chickens. Thus, hydro-ethanolic and aqueous extracts of the plant Mallotus oppositifolius were administered to chicks during breeding. Zootechnical, microbiological parameters and blood constants were evaluated. The search for Salmonella and Eimeria tenella oocysts was carried out on fecals samples of the subjects at the 10th, 21st and 38th days. Weight evolution, feed consumption, average daily gain, evaluated in the subjects of the control group, are similar to those obtained in the subjects of the test groups. No contamination by Salmonella, and no infestation by the parasite Eimeria tenella in all the experiments. Also, creatinine, urea, aspartate aminotransferase, alanine aminotransferase, Blood Sugar and C-reactive protein, subjects are normal, compared to the threshold values. In summary, the extracts of the plant Mallotus oppositifolius have an inhibitory effect on the contamination of potential avian pathogens such as Salmonellasp and Eimeria tenella.