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Liquid chromatography–mass spectrometry analysis of carvacrol in chicken tissues
2022
Śniegocki Tomasz
Carvacrol is an essential oil derived from oregano that is used as a natural additive to improve the efficiency of livestock nutrition. Residues of natural additives such as carvacrol should be monitored in food of animal origin to ensure consumer safety. The aim of this study was to appraise the quick, easy, cheap, effective, rugged and safe (QuEChERS) approach coupled with liquid chromatography and mass spectrometry as a means of carvacrol analysis in chicken tissue.
Afficher plus [+] Moins [-]Clinicopathological analysis of expression of enhancer of zeste homologue 2 in canine mammary carcinoma
2022
Ren Xiaoli | Fan Yuying | Li Yongqi | Shi Dongmei | Liu Yun
Enhancer of zeste homologue 2 (EZH2) is the human homologue of Drosophila zeste gene enhancer. The aim of this study was to determine the expression of EZH2 in canine mammary carcinomas (CMCs) and its relationship with clinicopathological features.
Afficher plus [+] Moins [-]Effect of oxidative status on the occurrence of haemolactia in dairy cows after calving
2022
Kuroiwa Tomoko | Matsuda Keiichi | Kanazawa Tomomi | Chee Hueyshy | Kimura Atsushi | Satoh Hiroshi | Sato Shigeru | Ichijo Toshihiro
Dairy cows may infrequently give milk tinged with blood after calving, which is a condition termed haemolactia. Economic losses for dairy farmers are caused by cases of haemolactia because of the condemnation of such milk, potential contamination of good bulk tank milk with haemolactic milk, and need for veterinarian intervention. This study was performed to elucidate the oxidative status of dairy cows with haemolactia during the peripartum period.
Afficher plus [+] Moins [-]Effects of bisphenol A and bisphenol F on porcine uterus contractility
2022
Zygmuntowicz Aleksandra | Markiewicz Włodzimierz | Grabowski Tomasz | Jaroszewski Jerzy
Bisphenols, as endocrine disruptors, may cause a wide range of health problems in humans, but so far, not all of them have been confirmed in animals, including pigs. Since animals are also exposed to bisphenols, we hypothesised that these substances may have an effect on uterine contractility in pigs. Therefore, the aim of the study was to investigate the effect of the most-used bisphenol, bisphenol A (BPA), and a selected analogue, bisphenol F (BPF), on the contractile activity of the pig uterus.
Afficher plus [+] Moins [-]First report of the presence of enterotoxin gene in coagulase-negative staphylococci recovered from meat of snails (Achatina achatina)
2022
Okafor Arthur C. | Ogbo Frank C. | Akharaiyi Fred C. | Oladeinde Henry B.
It has been suggested that coagulase-negative staphylococci can serve as reservoirs of virulence genes for other bacteria. This study assessed the presence of such genes in selected isolates recovered from meat of the giant African snail (Achatina achatina).
Afficher plus [+] Moins [-]Simultaneous determination of pyrrolizidine and tropane alkaloids in honey by liquid chromatography–mass spectrometry
2022
Kowalczyk Ewelina | Kwiatek Krzysztof
Pyrrolizidine alkaloids (PAs) and tropane alkaloids (TAs) are natural contaminants of honey and respectively hepatoxic and neurotoxic compounds. Because honey is a popular constituent of the human diet, it is relevant to warrant the safety of the product. For that reason, a method for simultaneous determination of PAs and TAs in honey based on liquid chromatography– mass spectrometry was developed.
Afficher plus [+] Moins [-]Antimicrobial resistance and virulence genes in staphylococci isolated from aviary capercaillies and free-living birds in south-eastern Poland
2022
Sulikowska Magdalena | Marek Agnieszka | Jarosz Łukasz | Stępień-Pyśniak Dagmara | Urban-Chmiel Renata
The current study characterises Staphylococcus bacteria recovered from dead free-living birds and captive capercaillies kept in south-eastern Poland. The results provide novel information about the antimicrobial resistance phenotype/genotype and the virulence profile of these bacteria.
Afficher plus [+] Moins [-]Preliminary study on gene regulation and its pathways in Chinese Holstein cows with clinical mastitis caused by Staphylococcus aureus
2022
Wang Wenjia | Li Rongling | Ye Tingzhu | Zhang Xinxin | Chen Chao | Liang Ai-xin | Yang Li-guo
Clinical mastitis (CM) is one of the most common diseases of dairy cows globally, has a complex aetiology and recurs easily. Staphylococcus aureus is a frequently isolated pathogen responsible for bovine mastitis and remains difficult to eradicate.
Afficher plus [+] Moins [-]Determination of veterinary drug residues, mycotoxins, and pesticide residues in bovine milk by liquid chromatography electrospray ionisation –tandem mass spectrometry
2022
Hajrulai-Musliu Zehra | Uzunov Risto | Jovanov Stefan | Kerluku Maksud | Jankuloski Dean | Stojkovski Velimir | Pendovski Lazo | Sasanya James Jacob
Multi-class and multi-residue analyses are very complex procedures because of the physico-chemical properties of veterinary drug residues and other contaminants. The purpose of the study was to develop an analytical method for the sensitive determination of 69 analytes in bovine milk by liquid chromatography electrospray ionisation–tandem mass spectrometry.
Afficher plus [+] Moins [-]Serum concentrations of immunoglobulins and cortisol around parturition in clinically healthy sows and sows with postpartum dysgalactia syndrome (PDS)
2022
Czyżewska-Dors Ewelina | Wierzchosławski Karol | Pomorska-Mól Małgorzata
This study aimed to determine the profile of immunoglobulins and cortisol concentrations in serum around the periparturient period in sows suffering from postpartum dysgalactia syndrome (PDS) and in healthy sows.
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