Experimental ochratoxicosis in turkey poults

Area of Science:

• Veterinary Toxicology
• Poultry Science
• Mycotoxicology

Background:

• Ochratoxin A (OA) is a common mycotoxin found in animal feed.
• Understanding OA toxicity in poultry is crucial for animal health and food safety.

Purpose of the Study:

• To investigate the toxic effects of graded concentrations of ochratoxin A in turkey poults.
• To determine the LD50 (Lethal Dose, 50%) of ochratoxin A via oral and intraperitoneal routes in turkeys of different ages.

Main Methods:

• Turkey poults were fed diets containing 0, 1, 2, 4, or 8 micrograms/g of ochratoxin A from hatch to 3 weeks of age.
• Growth rate, organ weights, feed conversion ratio, mortality, and various blood parameters were measured.
• Oral and intraperitoneal LD50 values were determined for day-old and 3-week-old poults.

Main Results:

• Ochratoxin A exposure (4 and 8 micrograms/g) led to decreased growth, enlarged proventriculus and gizzard, and thymus regression.
• Feed conversion ratio increased, and mortality significantly rose at 8 micrograms/g.
• Nephrotoxicity was indicated by increased plasma uric acid and decreased kidney dry weight; lymphocytopenia was also observed.

Conclusions:

• Ochratoxin A is a potent nephrotoxin in turkeys, affecting growth and causing organ changes.
• The toxicological profile of ochratoxicosis in turkeys differs significantly from that observed in other animal species.
• These findings highlight the importance of monitoring ochratoxin A levels in poultry feed.