Intensive research has focused on the
potential of natural growth promoters (NGP) to replace antibiotics. The
beneficial effects of NGP are mainly attributed to their potential to promote a
beneficial gut microflora which protects the host against pathogens and helps to
alleviate periods of stress. Tobias Steiner of Biomin argues that a
well-adjusted combination of different strategies will maximise the efficacy of
NGP in antibiotic-free feeding systems.
On the
brink of stopping the use of antibiotic growth promoters, acidifiers turn out
to be a relevant solution. But this effectiveness could be optimised by clever
use of a carrier composed of vegetable extracts.
Research
has shown us the many advantages of using protected organic acids. They are
viable alternatives to antibiotics, both cost effective and safe that we can
use to reduce the problems of Salmonella, E. coli and Campylobacter infections
in animal production.
Growth promoting antibiotics improve
average daily gain in broilers and pigs thanks to a combination of better feed
conversion and enhanced voluntary feed intake. With a total ban in the EU from
January 2006 and dwindling public acceptance elsewhere, there is a need for
safe feed additives that stimulate appetite and maintain animal productivity
and health.
The old
"one-acid-fits all" strategy has been replaced by an optimisation approach,
taking into consideration animal requirements, acid properties and safe
handling
What is the
precise function of acidifying feed and adding probiotics? Experiments carried
out in suggest that, in experimental situations at least, these treatments control pathogenic bacteria first, and improve production
as a side-effect. Will it catch on in practice?
When all AGP's are
banned by the EU in 2006, many other countries are expected to follow. This
will take away one weapon from the feed formulators to fight microbial
imbalances in young animals. However, more strategies are being evaluated and
in this new light animal productivity should not be compromised. Acidifiers
will form a solid basis in these strategies.
Seven years
after its discovery, the European Union (EU) has approved potassium diformate
(Formi®), as a non-antibiotic growth promote for use in pig feeds – the first
product to receive
such approval. Formal approval was granted on July 2nd under Council Directive
70/524/EEC.
Specific
ingredients in nursery diets have a supportive role during the development of
the digestive tract, and may counteract the stress-related imbalance in
intestinal flora.
Phytomolecules
added to feed may not produce their effects on growth and productivity via the
same mode of action as once thought. Research has allowed us to revise our
thinking, and to take a more
integrated approach to the use of plant extracts, combining their mode of
action with those of other AGP (Antibiotic Growth Promoter)-alternatives on the
market.