Sable®sh (Anoplopoma ®mbria) were recaptured up to 20 years after being injected with oxytetracycline (OTC). After 20 years the OTC mark is clear in most otoliths. Our examination of these otoliths con®rmed that sable®sh are long-lived and grow slowly after maturity. Annuli that formed beyond the OTC mark could be dif®cult to interpret in broken and burnt sections. However, polished thin sectio...

Serum oxytetracycline pharmacokinetics were studied in 18 African elephant (Loxodonta africana) calves. Each elephant received separate injections of oxytetracycline at approximately 18 mg/kg i.m. and 8 mg/kg i.v. in a cross-over study. Blood samples were drawn at 0, 24, 48, 72, and 96 hr postinjection. An additional sample was drawn 110 hr before the animals were reinjected in the cross-over s...

The in vitro activities of enrofloxacin, florfenicol, oxytetracycline and spiramycin were determined against field isolates of Mycoplasma mycoides mycoides large colony (MmmLC) by means of the broth microdilution technique. The minimum inhibitory concentrations (MICs) of these antimicrobial drugs were determined for a representative number of 10 isolates and 1 type strain. The susceptibility of...

Mycoplasma gallisepticum (MG) is one of the most important diseases of poultry industry in Iran and all over the world. Mortality, poor weight gain and increasing of feed conversion ratio (FCR) were seen in MG infected flocks. Several drugs are used for prevention and control of MG, the purpose of this study was to investigateoxytetracycline + Tiamulinefficacy on MG, and its role on broilers pe...

The aim of this study was to investigate the presence of tetracycline and oxytetracycline resistance determinants in Bacillus cereus strains isolated from honey samples. Of a total of 77 isolates analyzed, 30 (39%) exhibited resistance to tetracyclines according to the results of a disk diffusion method. Resistant strains (n=30) were screened by PCR for the presence of the resistant determinant...

Production of oxytetracycline by Streptomyces rimosus in several chemically defined media containing graded concentrations of inorganic phosphorus was studied in shake flasks. Although high levels of inorganic phosphate have been reported to inhibit oxytetracycline formation, this study indicated that composition of the medium is an important factor in determining whether antibiotic production ...

Oxytetracycline, one of the tetracycline family, is a broadspectrum antibiotic produced by different species of Streptenryces, namely Streptomyees rimosus, Streptonryces capuensis, Streptomyces henetus, and Struptomyces platensis (Finlay et al,i)), The antibiotic is active on Gram-pesitive and negative bacteria, spirochetes, rickettsiae, nd some viruses, Many workers2"i4) have studied factors a...