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Blood serum concentrations and biological half-life of oxytetracycline (OTC) after long action preparations were investigated in adult sheep of the Slovak Merino breed. A the same time their local tolerance has also been observed. In the first group oxytetracycline was administered in the form of preparation Tetraxyl L. A. inj. a.u.v. and in the second group in the form of preparations Alamycin L...
The aim of this study was the comparison of growth parameters, yields and qualitative properties of muscles in broiler hybrids ISA 220 and intermediate type ISA 257. One hundred and one one-day-old chicks, comprising approximately equal numbers of males and females were used. During the experiment the feed consumption (per 1 kg of body weight gain), weight gains, and body weight were recorded. After...
The aim of the studies was the evaluation of relationship between the tetracycline residue levels in milk of cows treated intrauterinary with different doses of tetracycline and clinical form of endometritis. Six cows were treated by intrauterine route with pessaries containing tetracycline hydrochloride. The cows in group 1 (n = 3) were affected with acute endometritis, and the cows in group 2 (n...
Blood serum concentrations and excretion of oxytetracycline (OTC) into milk after the i.m. administration of long-acting preparations in adult ewes were studied. Four ewes were treated with L.A. Engemycin and four - with L.A. Tetravet. OTC was administered to animals in a single dose of 20 mg/kg of live weight. OTC concentrations in blood serum were determined 1, 6 and 24 hours and then 2 to 8 days...
After the intramuscular administration of Engemycin L.A. inj. ad us. vet. (0.8 ml. 10kg⁻¹) to seven ewes for four consecutive days, the milk samples were collected at every 12 h of the experiment, from 0 to 166 h. The milk samples were analysed by the high performance liquid chromatography (HPLC) method. Twelve hours after the beginning of the experiment, all milk samples were positive for the presence...
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