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Residues of doxycycline and oxytetracycline in eggs after medication via drinking water to laying hens. 1991

H Yoshimura, and N Osawa, and F S Rasa, and D Hermawati, and S Werdiningsih, and N M Isriyanthi, and T Sugimori
Balai Pengujian Mutu dan Sertifikasi Obat Hewan (Veterinary Drug Assay Laboratory), Gunung Sindur, Bogor, Indonesia.

Doxycycline (DOTC) and oxytetracycline (OTC) were dissolved in drinking water (0.5 g/l) and supplied to laying hens for 7 consecutive days. Eggs laid were collected daily during and after medication, and the antibiotic concentrations in the yolk and albumin were determined by the cup-plate method with Bacillus cereus var. mycoides ATCC 11778. The concentrations of both antibiotics were increased in yolk day by day with the advance in medication, reached peaks 2 days after withdrawal and then declined gradually. Mean peak concentrations in the yolk were 6.70 micrograms/g for DOTC and 1.42 micrograms/g for OTC. Peak concentrations in the albumin occurred in the middle stage of medication, where the mean values were 12.24 micrograms/g for DOTC and 1.03 micrograms/g for OTC. DOTC was detected in albumin until 24 days after withdrawal and for 2 days more in yolk than in albumin. OTC was detected in yolk until 9 days after withdrawal. The depletion period of OTC was shorter for the albumin, where the residue disappeared in all eggs 6 days after withdrawal. In spite of similarities between DOTC and OTC in structure, DOTC was deposited in higher concentrations and lasted for a longer period in eggs. This characteristic was considered due to its greater lipophilicity, closely correlated with oral absorption and tissue penetration.

UI MeSH Term Description Entries
D010118 Oxytetracycline A TETRACYCLINE analog isolated from the actinomycete STREPTOMYCES RIMOSUS and used in a wide variety of clinical conditions. Hydroxytetracycline,Bisolvomycin,Geomycin,Oxyterracin,Oxyterracine,Oxytetracid,Oxytetracycline Anhydrous,Oxytetracycline Calcium,Oxytetracycline Dihydrate,Oxytetracycline Hydrochloride,Oxytetracycline Monohydrochloride,Oxytetracycline Sulfate (2:1),Oxytetracycline, (4a beta,5 beta,5a beta,12a beta)-Isomer,Oxytetracycline, (5 beta)-Isomer,Oxytetracycline, Anhydrous,Oxytetracycline, Calcium (1:1) Salt,Oxytetracycline, Disodium Salt, Dihydrate,Oxytetracycline, Sodium Salt,Terramycin
D002645 Chickens Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA. Gallus gallus,Gallus domesticus,Gallus gallus domesticus,Chicken
D004318 Doxycycline A synthetic tetracycline derivative with similar antimicrobial activity. 2-Naphthacenecarboxamide, 4-(dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,5,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo-, (4S-(4alpha,4aalpha,5alpha,5aalpha,6alpha,12aalpha))-,Alpha-6-Deoxyoxytetracycline,Atridox,BMY-28689,BU-3839T,Doryx,Doxycycline Calcium,Doxycycline Calcium Salt (1:2),Doxycycline Hemiethanolate,Doxycycline Hyclate,Doxycycline Monohydrate,Doxycycline Monohydrochloride, 6-epimer,Doxycycline Monohydrochloride, Dihydrate,Doxycycline Phosphate (1:1),Doxycycline-Chinoin,Hydramycin,Oracea,Periostat,Vibra-Tabs,Vibramycin,Vibramycin Novum,Vibravenos,Alpha 6 Deoxyoxytetracycline,BMY 28689,BMY28689,BU 3839T,BU3839T,Doxycycline Chinoin,Doxycycline Monohydrochloride, 6 epimer,Vibra Tabs
D004326 Drinking The consumption of liquids. Water Consumption,Water Intake,Drinkings
D004350 Drug Residues Drugs and their metabolites which are found in the edible tissues and milk of animals after their medication with specific drugs. This term can also apply to drugs found in adipose tissue of humans after drug treatment. Drug Residue,Residue, Drug,Residues, Drug
D004529 Egg White The white of an egg, especially a chicken's egg, used in cooking. It contains albumin. (Random House Unabridged Dictionary, 2d ed) Egg Whites
D004530 Egg Yolk Cytoplasm stored in an egg that contains nutritional reserves for the developing embryo. It is rich in polysaccharides, lipids, and proteins. Egg Yolks,Yolk, Egg,Yolks, Egg
D004531 Eggs Animal reproductive bodies, or the contents thereof, used as food. The concept is differentiated from OVUM, the anatomic or physiologic entity.
D005260 Female Females
D000284 Administration, Oral The giving of drugs, chemicals, or other substances by mouth. Drug Administration, Oral,Administration, Oral Drug,Oral Administration,Oral Drug Administration,Administrations, Oral,Administrations, Oral Drug,Drug Administrations, Oral,Oral Administrations,Oral Drug Administrations

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