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week with a relative high mortality (Table 1). A higher num- ber of microbial genera has repeatedly been associated with greater gut health resilience and better livestock perfor- mance. Specific bacterial genera play different roles in the gastrointestinal tract, such as generating compounds for di- gestive support, strengthening gut wall integrity, developing host-defence mechanisms and reducing the colonisation of harmful bacteria through competitive exclusion. Different types of feed additives have demonstrated modes of action to help build or maintain a stable microbiome. Even at low levels, combinations of additives create synergies which contribute to improved efficiency. Presan-FY, a combination of organic acids, medium chain fat- ty acids, slow release C12, target release butyrates and an en- capsulated capsicum extract, has been shown to be effective in increasing microbial diversity in broilers. A trial in Spain evaluated the pyrosequencing profile of the microbial com- munity in broiler jejunum and showed that Presan-FY in- creased microbiota diversity by 22%. In India, broilers fed Pre- san-FY in a trial had significantly reduced Escherichia coli counts while Clostridia tended to be reduced during the first three weeks of life. The findings indicated that the blend of ingredients is effective in helping birds maintain a stable mi- crobiota across various production phases. While broilers are commonly used as models to study the effect of various feed additives, research indicates that the benefits of feed addi- tives extend to pullets, layers and broiler breeders, as well.


Improved performance equal to AGPs An Australian study showed that Selacid Green Growth alleviated the impact of Clostridium perfringens and Eimeria (coccidiosis) challenges, delivering equal performance with an antibiotic growth promoter (AGP). These findings further illustrate the potential of specialised organic acid blends,


even in antibiotic-free production environments. An early start to a healthy microbiome translates into improved performance throughout production. Another external vali- dation trial demonstrated that FCR can significantly improve in Clostridium spp. and Eimeria spp.-challenged broilers fed this synergistic combination of organic acids, medium chain fatty acids, slow release C12, target release butyrates and an encapsulated capsicum extract, compared to broilers fed a standard diet without any AGPs (Figure 1).


Gold standard Whether on the Olympic podium or on the poultry farm, a strong performance begins early. Together with the best possible technical and veterinary management, specialised high quality feeds containing blends of synergistic feed additives are becoming the gold standard for poultry production globally.


References available on request.


Figure 1. FCR of broilers in different treat- ments (days 0-35)


1.520 a


1.400 1.420 1.440 1.460 1.480 1.500


1.380 1.504 Negative control b


Within 24 hours of hatching, en- terobacteria and streptococci col- onise the bird’s caeca and ex- pand to the rest of the intestinal tract.


1.481 Presan-FY ▶ POULTRY WORLD | No. 8, 2021 29


PHOTO: TROUW NUTRITION


Feed conversion, g/g


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