Our study developed a quick method for confirmatory analysis of avermectins (abamectin B1a, doramectin, ivermectin B1a, eprinomectin B1a, and moxidectin) in bovine milk according to the European Commission Decision 2002/657/EC requirements. Avermectins were liquid-liquid extracted with acetonitrile, followed by an evaporation step, and then analyzed by liquid chromatography/electrospray ionization tandem mass spectrometry in the negative ion mode. An in-house method validation was performed and the data reported on specificity, linearity, recovery, limit of detection, limit of quantitation, decision limit, and detection capability. The advantage of this method is that low levels of avermectins are detectable and quantitatively confirmed at a rapid rate in milk.

In this study we have devoloped and validated a confirmatory analysis method for nitrofuran metabolites, which is in accordance with European Commission Decision 2002/657/EC requirements. Nitrofuran metabolites in honey, milk, poultry meat and fish samples were acidic hydrolised followed by derivatisation with nitrobenzaldehyde and liquid-liquid extracted with ethylacetate. The quantitative and confirmative determination of nitrofuran metbolites was performed by liquid chromatography/electrospray ionisation tandem mass spectrometry (LC/ESI-MS/MS) in the positive ion mode. In-house method validation was performed and reported data of validation (specificity, linearity, recovery, CC_α and CC_β). The advantage of this method is that it avoids the use of clean-up by Solid-Phase Extraction (SPE). Furthermore, low levels of nitrofuran metabolites are detectable and quantitatively confirmed at a rapid rate in all samples.

In recent years, the widespread use of neonicotinoids in agricultural areas has caused environmental pollution due to its lower toxicity to mammals. Honey bees, which are considered as biological indicators of environmental pollution, can carry these pollutants to the hives. Forager bees returning from sunflower crops that have been treated with neonicotinoids treated sunflower fields cause residue accumulation in the hives, which reason colony-level adverse effects. This study analyses neonicotinoid residues in sunflower (Helianthus annuus) honey sampled by beekeepers from Tekirdag province. Honey samples have been subjected to liquid-liquid extraction methods before liquid chromatography-mass spectrometry (LC-MS/MS). The method validation was carried out to fulfill all the necessary requirements of procedures SANCO/12571/2013. Accuracy was in the range of 93.63108.56, for recovery in the range of 63.04103.19, and for precision in the range 6.0312.77. Detection and quantification limits were determined according to the maximum residue limits of each analyte. No neonicotinoid residues were found above the maximum residue limit in the sunflower honey samples analysed.

Background: There are many active substances in the composition of the Hypericum perforatum L. plant that have different and complex structures and show different pharmacological effects. It was accepted as a medicinal plant by the World Health Organization in 2002, and it is given a detailed place in the monographs under the name Hyperici herba. In these monographs, the anti-bacterial, anti-viral, anti-depressant, protein kinase-C inhibitor, and wound-healing effects of the plant were described. Objectives: The aim of this study is to determine the essential oil components in the samples of the H. perforatum L. plant, which is widely grown in the Thrace region in Türkiye. Materials and Methods: H. perforatum L. plant growing naturally in the provinces of the Thrace region was collected, and the essential oils of the plant were obtained by using the hydro distillation method after the collected herbs were dried. Chemical content analyses were performed on a gas chromatography-flame ionization detection (GC-FID). Results: The main components of the essential oil of the plant are sesquiterpenes (ß-caryophyllene, caryophyllene oxide, β-selinene, α-selinene, β-farnesene, α-amorphene, spathulenol), alcohols (1-tetradecanol, 1-tridecanol, phytol, and alpha cadinol), and fatty acids (pentadecanoic acid, palmitic acid, and 9, 12 octadecadienoic acid). Conclusion: This is the first study to determine the chemical composition of essential oil in H. perforatum L. samples collected from the Thrace region in Türkiye. The essential oil content of the plant can be affected by factors such as the developmental stages of the plant (preblooming, flowering stage, and fruiting time), use of fresh or dry plant material, extraction method, genetic parameters, and climate.

Antimicrobial resistance (AMR) has become a global problem due to widespread antimicrobial use in human and veterinary medicine. AMR affects health systems by leading to prolonged and severe illnesses, high mortality rates, and treatment failures caused by resistant microorganisms. As antibiotics are the most widely used drugs in veterinary medicine, veterinarians' knowledge, attitudes and practices regarding antibiotic use are crucial in combating AMR. In this cross-sectional study, an online questionnaire of 20 questions was administered to clinician veterinarians and members of the Trakya Chamber of Veterinarians and 60 participants answered the questionnaire. In the current survey, 98 % of veterinarians agree that AMR is an important public health problem and emphasize that focusing on rational antibiotic use in veterinary medicine is a critical area to slow the development of AMR. Only 10 % of the respondents stated that they take into account antibiotic requests from patient owners, 68.3 % stated that they rarely use off-label drugs and 16.7 % stated that they often use them. Of those respondents, 16.7 % stated that they routinely perform antibiograms. Regarding education, 41.7 % of veterinarians had received training on rational antibiotic use. When asked about their preferred type of training, 56.7 % favored online training, while 35 % preferred face-to-face sessions. The results indicate that veterinarians play a significant role in combating AMR and that more awareness and education are needed in this field.