In a trial with 20 x 225 broilers of Ross hybrid, the effect of different:d
osages (0, 0.3, 0.6 and 0.9%) of supplementing a mixture of organic acids (
Lupro-Cid(R)) to a control diet (starter, grower, finisher) was tested from
day 1 to 41.
Total bacterial counts after a storage period of six weeks have shown, that
the acid addition - even the 0.3% concentration Stopped microbial reproduc
tion effectively.
Growth performance was similar in all diets on a high level (average final
weight: 2,252 g, average feed consumption per kg weight gain: 1.753 kg). Ma
inly at the beginning of the trial, mortality was slightly lowered in the o
rganic-acid-supplemented diets. Up to: the end of the trial, this effect co
uld only be seen in the diet supplemented with 0.9% of the mixture of organ
ic acids.
Microbial tests from cloaca swaps just before slaughtering showed Campyloba
cter jejuni-positive results for the control broilers, whereas no Campyloba
cter jejuni were found in the cloaca of acid-treated animals.