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EN
The aim of the study was to develop a sensitive analytical method that enables to determine cefacetril concentration in milk after its application to the udders, as well as to establish and compare cefacetril’s basic pharmacokinetic indicators after its intramammary application to cows with inflammed and healthy udders. The content of cefacetril was determined with the use of high-performance liquid chromatography with UV detection. Usefulness of the developed analytical method in the studies of pharmacokinetics of cefacetril has been demonstrated. Results obtained during the statistical analysis and bacteriological examinations allowed to regard the antibiotic as an accurately selected medical product used in the treatment of mastitis in cows.
EN
The article describes the possibility of using melatonin in cases of neoplastic diseases in animals. Most observational studies show an association between melatonin and cancer in animals and humans. The mechanisms by which melatonin may act in this way have not been fully elucidated. The oncostatic action of melatonin in mammary cancer, as well as in uterine and prostate cancer, may result from the modulating effect on the enzymes involved in the local synthesis of estrogens. Many biological effects of melatonin, including antitumor activity, are caused by the activation of membrane receptors (MT1 and MT2), connected with regulatory proteins (G proteins). Other possible anti-cancer mechanisms include anti-angiogenic activity, anti-inflammatory activity, protection from oxidative damage, and immunostimulation. Many studies confirm the efficacy and safety of melatonin in cancer treatment. Melatonin can be used with chemotherapy in animals not only to support the action of anticancer drugs, but also to reduce their toxicity.
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tom 62
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nr 07
797-800
EN
A validation method is a key element in both the elaboration of reference methods and the assessment of a laboratory's competence in producing reliable analytical data. The aim of the study was to validate the GC method (according to Marcus and Sherma), which is used in determining 8-α-hydroxymutilin in a biological matrix (swine tissues: liver and muscles). The fundamental parameters for validation, including accuracy, precision, selectivity, sensivity, reproductibility and stability, were estimated. The studies confirmed the usefulness of the GC method for determining tiamulin residues in swine tissues.
EN
Melatonin (MT), a hormone synthesized in the pineal gland, regulates a number of physiological processes in mammals. The range of clinical applications of the synthetic analogue of the hormone in both humans and animals is increasing. This paper, based on our observations, describes the applicability of MT in tablets in various cases of abnormal behavior of cats and dogs. Cases in which the efficacy of MT was confirmed include, among others, the animal’s anxiety caused by excessive noise, by being left alone at home, and by transportation. Other disturbances in which the drug can be applied include excessive excitability of cats and dogs in the postoperative period resulting in breaking the stitches or licking fresh surgical wounds, as well as various types of stereotypies, such as the animal chasing its own tail, dermatitis caused by obsessive licking, or aggression towards other animals or the owner. An additional argument in favor of applying MT in cats and dogs is its virtual non-toxicity.
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