Incidence of tetracycline residues in chicken meat and liver retailed to consumers

Abstract

The incidence of tetracyclines' (TCs) residue (oxytetracycline, tetracycline, chlorotetracycline and doxycycline) in fresh chicken samples (meat and liver) collected during one year was recorded. TC residues were analysed using an HPLC-DAD method. The limit of detection for meat was 4.4, 5, 10 and 7 ng g(-1) for OTC, TTC, CTC and DOC, respectively, compared with 5.5, 6, 12 and 9 ng g(-1) stated for liver. The recovery of the method ranged from 91% to 70% depending upon both matrix type and tetracycline kind. The results revealed that 66 (44%) samples contained TC residues including 21 (42%) breast, 19 (38%) thigh and 26 (52%) liver samples. The corresponding contaminated ranges were 124-5812, 107-6010 and 103-8148 µg kg(-1). A total of 12 (8%), 13 (7.33%) and 20 (13.33%) samples of breast, thigh and liver, respectively, had TC residues above the Codex maximum residue limit (MRL). Liver samples had a higher incidence and level than those found in breast or thigh samples.

Highly sensitive determination of tetracycline in chicken meat and eggs using AuNP/ MWCNT-modified glassy carbon electrodes

“…Muscle tissues in poultry tend to have the least concentration of antibiotics since they do not process toxins like the liver and they are not directly inoculated unlike the inside of chicken wings. Furthermore, breasts tend to have more tetracyline concentration than thighs showing that not all tissue muscles incorporate antibiotics at the same concentration in agreement with other studies (Marangon and Busani, 2006; Shalaby and Salama, 2011). The chicken parts contain tetracycline residues that are above 2 ppm, which are much higher that those of maximum residual limit (MRL) values.…”

Assessment of The Distribution and Concentration of Residual Antibiotics in Chicken Meat and Liver Samples Collected in Tehran by Liquid Chromatography and Tandem Mass Spectrometry

“…Therefore, liver contained the highest level of antibiotic residues in comparison to other organs. Similar findings have been reported from Iran [32,33], Bulgaria [34] and Egypt [35]. High prescription of antibiotic agents caused severe increase in the levels of antibiotic resistant-bacteria other than antibiotic residues [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50].…”

Macleaya cordata helps improve the growth-promoting effect of chlortetracycline on broiler chickens

“…Chlortetracycline (CTC), one kind of tetracyline (Chopra and Roberts, 2001;Motamedi et al, 2010;Nelson et al, 2011), is widely used in the production feeding of livestock. As is known, CTC can not only prevent diseases through the inhibition of protein synthesis in the microorganism (Aarestrup et al, 1998; de Ruyck et al, 1999;Salama et al, 2011;Milbradt et al, 2014), but also accelerate the growth of simplestomach animals, such as swine and broiler chickens (Kilroy et al, 1990). Several studies have demonstrated that changes of intestinal microbiota induced by CTC are central to growth promotion (Gaskins et al, 2002;Dibner and Richards, 2005).…”