Dr. Maria TERRA-LONG
Dr. Terra-Long lives in Alabama-US and started working with Phileo this February as the North America Poultry Technical Services Manager.
She is originally from Brazil where she graduated from her Veteriny Degree at the Federal University of Minas Gerais.
After vet school, she worked as a field poultry veterinarian in a cooperative for 2 years before moving to the U.S. to start her Ph.D. in Poultry Science at Auburn University.
Her research focus was on gut health. She studied the effect of alternative treatments for parasites on citokyne gene expression, microbiota and nutrient digestibility. Dr. Terra-Long is an active member of the American Association of Avian Pathologists and chairs the Enteric Diseases Committee since last year.
Yeast Probiotics and Their Remarkable Impact on the Chicken Microbiota.
The aim of this study was to evaluate the effects of various doses of a yeast probiotic on the performance and gut microbiota of commercial broilers. Ross 708 broilers were house at day-old, challenged with coccidiosis vaccine at a 2x dose and divided into 5 groups: negative control (NC), BMD (50g/T) and Actisaf® (yeast probiotic) at 250g/T, 375g/T, and 500g/T.
Birds were reared on used litter up to 49 days of age and received a corn-soybean based diet with inclusion of 5% DDGS.Birds fed the yeast probiotic were heavier than the NC in all time-points.
For all ages running cumulative FCR showed significant improvement (p ≤ 0.05) compared to the NC and similar to the BMD group. Probiotic and BMD treated birds had higher α-diversity than NC birds (p ≤ 0.05).
Actisaf slightly increased Butyricicoccus and significant increased Sellimonas. The difference in gut microbial species and populations could explain the improvements in FCR especially because higher diversity is commonly associated with a more stable gut microbiota.
The yeast probiotic, at all concentrations, improved growth performance of broilers similar to BMD suggesting that they can be used as an economical alternative.