Репозиторий Университета

© 2018 Tomsk National Research Medical Center of the Russian Academy of Sciences. All rights reserved. The purpose of the study was to present data on polymixin-based antibiotics with activity against infections caused by multidrug-resistant Gram-negative bacteria, such as Acinetobacter baumannii, Klebsiella pneumoniae, and Pseudomonas aeruginosa. Material and methods. The review includes data from clinical as well as in vitro studies for the period 1998–2017. The search for relevant sources was carried out in the Medline, Cochrane Library, Elibrary and other databases. Results. The analysis of the data showed the presence of synergism and additive activity of polymyxin in combination with carbapenems, rifampicin and azithromycin. However, experimental data showed no direct positive correlation between combination of polymyxim and azithromycin/ rifampicin. In clinical studies, in hospital-acquired pneumonia, including ventilator-associated pneumonia, the clinical response rate of polymyxin B combined with other antibiotics ranged from 38 % to 88 %. High nephro- and neurotoxicity of polymyxin observed in previous studies can be explained by a lack of understanding of its toxicodynamics or the use of an incorrect dose. Conclusion. Polymyxin B in combination with other antibiotics is a promising treatment against infectious complications caused by multidrug resistant Gram-negative bacteria.

© Bionika Media Ltd. Objective. To carry out a systematic analysis of the data available in the current literature on the modern view on Trousseau’s syndrome Material and methods. The review included the data of foreign and Russian articles published in the past 10 years and found in e-Library and PubMed on this topic. Results. This paper provides a pathogenetic explanation for the increased thrombotic potential in cancer patients, which underlies tumor growth and metastasis. In addition to direct thrombotic events, the paper also describes hemorrhagic complications resulting from systemic coagulopathy, including disseminated intravascular coagulation, hemolytic thrombotic microangiopathy, and excessive fibrinolysis. Conclusion. At present, any manifestation of thrombohemorrhagic complications in patients with malignant tumors can be classified as a paraneoplastic syndrome (Trousseau’s syndrome). In addition to Virchow’s classic triad, hyperproduction of tissue factor (TF), the main initiator of the extrinsic coagulation pathway, underlies the pathophysiology of Trousseau’s syndrome. At the same time, the substantial release of microparticles from TF-bearing tumor cells is critical not only for clot formation, but also for the progression of tumor growth.

© 2018 Tomsk National Research Medical Center of the Russian Academy of Sciences. All rights reserved. We studied capabilities of the Bruker Microflex MALDI-TOF device for species identification of anaerobic gramnegative cocci isolated from clinical specimens of cancer patients. Seventy clinical isolates of Veillonella spp. and one Acidaminococcus spp were analyzed. All isolates were identified to the species level with a scores greater than 1.9. The most common species were V. parvula (37 strains), followed by V. dispar (16), V. atypica (16) and V. denticariosi (1). Susceptibilities of the isolates were determined by the E-test methodology. All Veillonella isolates were susceptible to imipenem, whereas high resistance rates were observed for penicillin G, amoxicillin/clavulanate and metronidazole. The proportion of resistant isolates of V. parvula, V. dispar and V. atypica to penicillin was 86 %, 85 % and 100 %, respectively. The resistance to amoxicillin/clavulanate was observed in 28.6 % of V. parvula isolates, 23.1 % of V. dispar isolates and in 6.7 % of V. atypica isolates. Resistance to metronidazole (MIC = 8 μg/ml) of V. parvula, V. dispar and V. atypica was 88.6 %, 53.8 % and 40 %, respectively.