Observation of residues in tissues of chickens exposed to low dietary concentrations of chloramphenicol.
To investigate potential residues in tissues arising from naturally occurring low levels of chloramphenicol in plant material, feeding studies were conducted with chickens. A common chicken feed was prepared containing 0, 10, 50 and 200 μg kg-1chloramphenicol and levels were confirmed by LC-MS/MS. Four separate groups of broiler chickens, eight animals in each group, were fed all their 35-day life with this contaminated feed. They were allowed ad libitum access to this feed and fresh water. After slaughtering the chickens, the residues in muscle and liver tissues were determined using GC/MS-NCI method. No residues were detected in tissues of animals from groups fed with feed containing 0, 10 or 50 µg kg-1. Low chloramphenicol residual concentrations were observed in a few of the muscle samples obtained from the group of chickens fed with feed containing chloramphenicol in added concentration 200 µg kg-1. No residues were detected in the remaining samples of this group. These results indicate that when residues of chloramphenicol are detected it is in all probability through illegal use.
a ÚSKVBL - Institute for State Control of Veterinary Biologicals and Medicines , Brno , Czech Republic.
Martina
M
Rejtharová
a ÚSKVBL - Institute for State Control of Veterinary Biologicals and Medicines , Brno , Czech Republic.
Libor
L
Rejthar
a ÚSKVBL - Institute for State Control of Veterinary Biologicals and Medicines , Brno , Czech Republic.
Katarína
K
Čačková
a ÚSKVBL - Institute for State Control of Veterinary Biologicals and Medicines , Brno , Czech Republic.
Jiří
J
Bureš
a ÚSKVBL - Institute for State Control of Veterinary Biologicals and Medicines , Brno , Czech Republic.
Eva
E
Vernerová
a ÚSKVBL - Institute for State Control of Veterinary Biologicals and Medicines , Brno , Czech Republic.
Alfred
A
Hera
D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000032:analysis*; D002645:Chickens; D002701:Chloramphenicol / Q000008:administration & dosage / Q000032:analysis*; D002853:Chromatography, Liquid; D004335:Drug and Narcotic Control / Q000331:legislation & jurisprudence; D005506:Food Contamination / Q000032:analysis*; D006801:Humans; D057230:Limit of Detection; D008099:Liver / Q000737:chemistry; D008460:Meat / Q000032:analysis*; D009132:Muscles / Q000737:chemistry; D053719:Tandem Mass Spectrometry; D019155:Veterinary Drugs / Q000008:administration & dosage / Q000032:analysis*
D000900:Anti-Bacterial Agents; D019155:Veterinary Drugs; D002701:Chloramphenicol
Chloramphenicol; chickens; feed; tissue