Leandro Redondo

IntroductionThe chicken gastrointestinal tract (GIT) harbors a very diverse microbiota, dominated by Bacteria, that influences health and growth performance of chicken. A healthy microbiota provides nutrients to the host and promotes competitive exclusion [1]. The composition of the GIT microbiota differs according to diet, age and genotype of hosts as well as the portion of the intestinal tract, ...

1. IntroductionFor more than 50 years, antibiotic growth promoters (AGPs) have been used in agricultural animal production as a means to increase growth performance through maintained animal health and improved feed efficiency [1]. During the last decades, global concern about development and transference of antimicrobial resistance from animal to human strains is rising [2]. The benefits of AGPs ...

    Phytogenic compounds, probiotics and organic acids are used in broiler feeds as an option to AGPs due to their ability to emulate properties of antibiotics. This study’s goal was to compare a field AGP (virginiamycin 100 g/MT) program (T1) with two antibiotic free programs: Lactococcusbased probiotic+yeast MOS+a blend of Italian Chestnut-C/Argentine Quebracho-Q bioactive ex ...

The importance of the microbiota in the gastrointestinal tract of animals is recognized to have an important role in host health and productivity. In this study, we sought to assess and characterize the microbiota in the feces of poultry chickens from several farms of 2 different integrators in the same geographical region of South America. These companies were changing AGP program to an AGP-free ...

INTRODUCTIONAntimicrobial agents have been used extensively for prevention and treatment of infectious diseases in food animals (Dibner and Richards, 2005; Niewold, 2007). The concomitant risk of spreading antibiotic resistance to human population through the food supply chain and the environment is important since many classes of these antimicrobial agents are also used in human medicine. Th ...