Investigation of the antibiotic (tetracycline) residuesin the chick liver

DEMİRCİ, S. (2017). Investigation of Antibiotic (Tetracycline) Residues in Chicken Liver. Yeditepe University. Institute of Health Science, Master Thesis. İstanbul This study was carried out on 100 chicken liver sold outdoor in order to investigate tetracycline residues in chicken liver. Chicken (Gallus gallus domesticus) is a bird species raised for meat and eggs in farms that have begun industrialization since World War II. It is a food that is consumed a lot because of reasons such as chicken has high quality protein, low cholesterol, cheaper than red meat in the world and our country. In production facilities, antibiotics are used for the purpose of protecting chickens from growing diseases and growing chickens that grow faster and faster with less loss. Tetracycline group antibiotics are widely used in chickens due to their broad spectrum and low toxic effects. Antibiotic residues arise because antibiotics are discontinued following the ten-day cutting ban after use or when high doses can not be eliminated from the tissues and organs of the chickens. This situation causes the antibiotic residues in the cut chicken to pass to humans and the environment. This study was conducted because of the high consumption of chickens in the world and especially in our country. In the study, 100 poultry liver samples collected from the market were collected and antibiotic residue levels were examined. The qualitative test was used for the MeRA test, and tetracycline levels were quantitatively analyzed with elisa test. In all of the samples, antibiotic residue levels were found to be qualitatively positive. Specifically, when tetracycline residues are considered, it is found that 16% of the samples are above the maximum residue limits and 3% are at the limit values. In the remaining samples, tetracycline values were found to be within acceptable maximum residue limits. This suggests that antibiotics should be used in chickens and the cut date of chickens given antibiotics should be considered. In addition, when the legal requirements imposed in our country are complied with, such situations will also stop to exist. Key Words: Chicken, chicken liver, antibiotic, residue, tetracycline, MeRA test, elisa test