Author(s): Nedeljković-Trailović Jelena, Jovanović N, Sinovec Z
Keywords:broilers, ochratoxin A, performance, resting period
The present study was designed to examine the harmful effects of low level ochratoxin A (OTA) for different period and different dietary OTA levels for same period of ingestion as well as to assess the resting period necessary to revoke any adverse effects of OTA. The trial was performed on 72 day-old chickens with 12 broilers in each group. The experimental groups were offered feed contaminated with 0.5 ppm OA during 7, 14 or 21 days in the first evaluation, and feed contaminated with 0.5, 1.0 or 1.5 ppm OTA for 7 days in the second evaluation. The control group (K) received feed free of toxin. Broilers in the control groups had an average daily gain of 43.5 g and a feed: gain ratio of 1.97 kg. OTA expressed a negative effect on performance proportion to the time of exposure and to the amount of dietary toxin, showing prolong and cumulative effects. Early detection of OTA and exclusion of contaminated feed could partially prevent its adverse effects, but not less than three weeks of recovery is needed to nullify the damage.
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