22 results on '"Lendak D"'
Search Results
2. Proton Chemical Shift Imaging Study of the Combined Antiretroviral Therapy Impact on Neurometabolic Parameters in Chronic HIV Infection
- Author
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Boban, J., primary, Kozic, D., additional, Turkulov, V., additional, Lendak, D., additional, Bjelan, M., additional, Semnic, M., additional, and Brkic, S., additional
- Published
- 2017
- Full Text
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3. C0209: Significance of Hemostasis-Related Parameters as Predictors of Multiple Organ Failure in Sepsis
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Mihajlovic, D., primary, Brkic, S., additional, Draskovic, B., additional, Lendak, D., additional, Novakov Mikic, A., additional, Cebovic, T., additional, Jurisic, D., additional, and Mitic, G., additional
- Published
- 2014
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4. The etiology of viral gastroenteritis in patients requiring hospitalization: Differences between rotavirus and norovirus infections - practical or only academic significance?
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Doder Radoslava, Lendak Dajana, Ilić Svetlana, Kovačević Nadica, Tomić Slavica, and Bošković Ksenija
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norovirus ,rotavirus ,gastroenteritis ,hospitalization ,length of stay ,Medicine - Abstract
Introduction/Objective. Viral gastroenteritides (VGEs) have great infectious potential and may occur in all age groups. Loss of fluid due to vomiting and diarrhea represent a special risk, and may result in a more severe clinical presentation in children, the elderly, and people with chronic diseases. The aim of the study was to explore the causes of VGEs among hospitalized patients, as well as to evaluate the severity of clinical symptoms in rotavirus and norovirus infections. Methods. The observational prospective study included 191 patients aged 2–88 years who were treated at the Clinic for Infectious Diseases, Clinical Center of Vojvodina, Novi Sad, over a two-year period. Testing of stool samples for viral agents was done by the reverse-transcription polymerase chain reaction method. Positive findings were found in 59 patients. Results. Of 59 patients with confirmed viral gastroenteritis, in 31 (52.5%) it was caused by rotavirus, in 17 (28.8%) by norovirus, three patients (5.1%) had other viral causes, while co-infection with two viruses was found in eight (13.5%) patients. The severity of clinical manifestations as expressed with Vesikari score did not differ with regard to infectious agents (p = 0.353). However, patients with rotavirus infection had a higher incidence of fever (p = 0.043), longer duration of diarrhea (p = 0.015) and dehydration (p = 0.014), and longer need for hospital treatment (p = 0.030). Conclusion. The most common cause of VGEs in our hospitalized patients was rotavirus. There was no difference in the severity of clinical symptoms between rotavirus and norovirus infections.
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- 2017
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5. Extrahepatic manifestations of chronic hepatitis C and their influence on response to treatment with Pegylated interferon alfa-2a and ribavirin
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Fabri Milotka, Ružić Maja, Lendak Dajana, Preveden Tomislav, Fabri Izabela, and Petrić Vedrana
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chronic hepatitis C ,extrahepatic manifestations ,autoimmune hepatitis ,Medicine - Abstract
Introduction. Thirty to 50% of patients with chronic hepatitis C (CHC) have one or more extrahepatic manifestations (EHMs) of hepatitis C virus (HCV) infection. Objective. The aim of this study was to evaluate the frequency of EHMs and to investigate the efficacy of pegylated interferon (PegIFN)α2a plus ribavirin therapy in patients with HCVrelated EHMs. Methods. The study included 280 patients suffering from CHC and treated with PegIFNα2a and ribavirin. The patients were divided in two groups according to presence or absence of EHMs. We evaluated virological response to antiviral therapy. Results. One or more EHMs were found among 27.9% of patients. Most frequently they had rheumatoid factor in serum (12.5%), organnonspecific antibodies ANA and AGMA (12.4%), thyroid hormone disorders (9.3%), vasculitis (5.7%), diabetes mellitus (4.65%), glomerulonephritis (0.71%), and porphyria cutanea tarda (0.36%). Among the patients with EHMs there was 52.6% of females vs. 30.2% of females in the group of patients without EHMs (p=0.001). HCV genotypes 1 and 4 had 85.9% patients with EHMs vs. 58.4% of patients without EHMs (p=0.000). Progressive fibrosis and cirrhosis were more frequently recorded in the EHM group of patients (32% vs. 23.2%), but without statistically significant difference (p=0.532). Serious adverse events of PegIFNα2a and ribavirin were statistically significantly recorded among the patients with EHMs (46.1% vs. 12.9%; p=0.000). Sustained virological response among the patients with and without EHMs rated 56.9% and 70.8% respectively (p=0.125). Conclusion. Patients with CHC and EHMs treated with combined PegIFNα2a and ribavirin experience handling difficulties, more often have serious adverse events, while successful outcome is achieved in about 50% of patients.
- Published
- 2013
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6. The Effect of Intravenous Tranexamic Acid on Perioperative Blood Loss, Transfusion Requirements, Verticalization, and Ambulation in Total Knee Arthroplasty: A Randomized Double-Blind Study.
- Author
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Jovanovic G, Lukic-Sarkanovic M, Lazetic F, Tubic T, Lendak D, and Uvelin A
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- Humans, Male, Female, Double-Blind Method, Aged, Middle Aged, Administration, Intravenous, Treatment Outcome, Walking, Tranexamic Acid administration & dosage, Tranexamic Acid therapeutic use, Arthroplasty, Replacement, Knee methods, Arthroplasty, Replacement, Knee adverse effects, Blood Transfusion statistics & numerical data, Blood Transfusion methods, Blood Loss, Surgical prevention & control, Antifibrinolytic Agents therapeutic use, Antifibrinolytic Agents administration & dosage
- Abstract
Background and Objectives: Total knee arthroplasty (TKA) is sometimes associated with significant perioperative bleeding. The aim of this study was to determine the efficacy of tranexamic acid (TXA) in reducing perioperative blood loss in patients undergoing primary TKA. The secondary objectives were to assess the efficacy of TXA in reducing the need for blood transfusion in these patients and to determine its effect on verticalization and ambulation after TKA. Materials and Methods: This study included 96 patients who were randomly assigned to two groups, each containing 48 patients. The study group received intravenous TXA at two time points: immediately after the induction with doses of 15 mg/kg and 10 mg/kg 15 min before the release of the pneumatic tourniquet. The control group received an equivalent volume of 0.9% saline solution via the same route. Results: TXA markedly reduced (Z = -6.512, p < 0.001) the total perioperative blood loss from 892.56 ± 324.46 mL, median 800 mL, interquartile range (IQR) 530 mL in the control group, to 411.96 ± 172.74 mL, median 375 mL, IQR 200 mL, in the TXA group. In the TXA group, only 5 (10.4%) patients received a transfusion, while in the control group, 22 (45.83%) received it (χ2 = 15.536, p = 0.001). Patients in the study group stood (χ2 = 21.162, p < 0.001) and ambulated earlier postoperatively, compared to the control group (χ2 = 26.274, p < 0.001). Patients who received TXA had a better overall postoperative functional recovery. There was a statistically significant difference in all the above results. Conclusions: TXA is an effective drug for reducing the incidence of perioperative bleeding, decreasing transfusion rates, and indirectly improving postoperative functional recovery in patients undergoing primary TKA.
- Published
- 2024
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7. Prognostic Value of Routine Biomarkers in the Early Stage of COVID-19.
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Mihajlović A, Ivanov D, Tapavički B, Marković M, Vukas D, Miljković A, Bajić D, Semnic I, Bogdan M, Karaba Jakovljević D, Nikolić S, Slavić D, and Lendak D
- Abstract
Various biomarkers like certain complete blood cell count parameters and the derived ratios including neutrophil-lymphocyte ratio are commonly used to evaluate disease severity. Our study aimed to establish if baseline levels of complete blood cell count-derived biomarkers and CRP, measured before any treatment which can interfere with their values, could serve as a predictor of development of pneumonia and the need for hospitalization requiring oxygen therapy. We retrospectively analyzed the laboratory data of 200 consecutive patients without comorbidities, who denied usage of medications prior to blood analysis and visited a COVID-19 ambulance between October and December 2021. Multivariate regression analysis extracted older age, elevated CRP and lower eosinophil count as significant independent predictors of pneumonia ( p = 0.003, p = 0.000, p = 0.046, respectively). Independent predictors of hospitalization were higher CRP ( p = 0.000) and lower platelet count ( p = 0.005). There was no significant difference in the neutrophil-lymphocyte and platelet-lymphocyte ratios between examined groups. Individual biomarkers such as platelet and eosinophil count might be better in predicting the severity of COVID-19 than the neutrophil-lymphocyte and platelet-lymphocyte ratios.
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- 2023
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8. Clinical Presentations, Predictive Factors, and Outcomes of Clostridioides difficile Infection among COVID-19 Hospitalized Patients—A Single Center Experience from the COVID Hospital of the University Clinical Center of Vojvodina, Serbia
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Kovačević N, Lendak D, Popović M, Plećaš Đuric A, Pete M, Petrić V, Sević S, Tomić S, Alargić J, Damjanov D, Kosjer D, and Lekin M
- Subjects
- Aged, Albumins, Anti-Bacterial Agents therapeutic use, Diarrhea epidemiology, Diarrhea etiology, Hospitals, Humans, Retrospective Studies, Serbia epidemiology, Universities, Yugoslavia, COVID-19 complications, Clostridioides difficile, Clostridium Infections complications, Clostridium Infections drug therapy, Clostridium Infections epidemiology, Coinfection epidemiology
- Abstract
Background : This study aimed to investigate the clinical form, risk factors, and outcomes of patients with COVID-19 and Clostridioides difficile co-infections. Methods : This retrospective study (2 September 2021-1 April 2022) included all patients with Clostridioides difficile infection (CDI) and COVID-19 infection who were admitted to the Covid Hospital of the University Clinical Center of Vojvodina. Results : A total of 5124 COVID-19 patients were admitted to the Covid Hospital, and 326 of them (6.36%) developed hospital-onset CDI. Of those, 326 of the CDI patients (88.65%) were older than 65 years. The median time of CDI onset was 12.88 days. Previous hospitalizations showed 69.93% of CDI patients compared to 38.81% in the non-CDI group ( p = 0.029). The concomitant antibiotics exposure was higher among the CDI group versus the non-CDI group (88.65% vs. 68.42%, p = 0.037). Albumin levels were ≤ 25 g/L among 39.57% of the CDI patients and 21.71% in the non-CDI patients ( p = 0.021). The clinical manifestations of CDI ranged from mild diarrhea (26.9%) to severe diarrhea (63.49%) and a complicated form of colitis (9.81%). Regarding outcomes, 79.14% of the CDI patients recovered and 20.86% had fatal outcomes in-hospital. Although a minority of the patients were in the non-CDI group, the difference in mortality rate between the CDI and non-CDI group was not statistically significant (20.86% vs. 15.13%, p = 0.097). Conclusions : Elderly patients on concomitant antibiotic treatments with hypoalbuminemia and with previous healthcare exposures were the most affected by COVID-19 and CD co-infections.
- Published
- 2022
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9. Epidemiological study on the incidence of haemorrhagic fever with renal syndrome in five Western Balkan countries for a 10-year period: 2006-2015.
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Štrbac M, Vuković V, Patić A, Medić S, Pustahija T, Petrović V, Lendak D, Ličina MK, Bakić M, Protić J, Pranjić N, Jandrić L, Sokolovska N, and Ristić M
- Subjects
- Animals, China epidemiology, Epidemiologic Studies, Female, Humans, Incidence, Male, Serbia, Epidemics, Hemorrhagic Fever with Renal Syndrome epidemiology, Hemorrhagic Fever with Renal Syndrome veterinary
- Abstract
Background: Large-scale epidemics of haemorrhagic fever with renal syndrome (HFRS) have been reported mostly in Asia and Europe, with around 100,000 people affected each year. In the Southeast Europe, Balkan region, HFRS is endemic disease with approximately 100 cases per year. Our aim was to describe epidemiological characteristics of HFRS in five Western Balkan (WB) countries and to describe correlation between HFRS incidence and major meteorological event that hit the area in May 2014., Methods: National surveillance data of HFRS from Bosnia and Herzegovina, Croatia, Montenegro, North Macedonia and Serbia obtained from 1 January 2006 to 31 December 2015 were collected and analysed., Results: In a 10-year period, a total of 1,065 HFRS patients were reported in five WB countries. Cumulative incidence rate ranged from 0.05 to 15.80 per 100.000 inhabitants (in North Macedonia and Montenegro respectively). Increasing number of HFRS cases was reported with a peak incidence in three specific years (2008, 2012, and 2014). Average incidence for the entire area was higher in males than females (5.63 and 1.90 per 100.000 inhabitants respectively). Summer was the season with the highest number of cases and an average incidence rate of 1.74/100.000 inhabitants across 10-year period. Haemorrhagic fever with renal syndrome incidence was significantly increased (7.91/100.000 inhabitants) in 2014, when a few months earlier, severe floods affected several WB countries. A strong significant negative correlation (r = -.84, p < .01) between the monthly incidence of HFRS and the number of months after May's floods was demonstrated for the total area of WB., Conclusion: Our findings demonstrate that the HFRS incidence had similar distribution (general, age, sex and seasonality) across majority of the included countries. Summer was the season with the highest recorded incidence. Common epidemic years were detected in all observed countries as well as a negative correlation between the monthly incidence of HFRS and the number of months after May's cyclone., (© 2022 Wiley-VCH GmbH.)
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- 2022
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10. Unexpected TBEV Seropositivity in Serbian Patients Who Recovered from Viral Meningitis and Encephalitis.
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Banović P, Díaz-Sánchez AA, Đurić S, Sević S, Turkulov V, Lendak D, Mikić SS, Simin V, Mijatović D, Bogdan I, Potkonjak A, Savić S, Obregón D, and Cabezas-Cruz A
- Abstract
The tick-borne encephalitis virus (TBEV) causes a life-threatening disease named Tick-borne encephalitis (TBE). The clinical symptoms associated with TBE range from non-specific to severe inflammation of the central nervous system and are very similar to the clinical presentation of other viral meningitis/encephalitis. In consequence, TBE is often misclassified by clinical physicians, mainly in the non-identified high-risk areas where none or only a few TBE cases have been reported. Considering this situation, we hypothesized that among persons from northern Serbia who recovered from viral meningitis or encephalitis, there would be evidence of TBEV infection. To test this hypothesis, in this observational study, we evaluated the seroreactivity against TBEV antigens in patients from northern Serbia who were hospitalized due to viral meningitis and/or viral encephalitis of unknown etiology. Three cases of seroreactivity to TBEV antigens were discovered among convalescent patients who recovered from viral meningitis and/or encephalitis and accepted to participate in the study ( n = 15). The clinical and laboratory findings of these patients overlap with that of seronegative convalescent patients. Although TBE has been a notifiable disease in Serbia since 2004, there is no active TBE surveillance program for the serologic or molecular screening of TBEV infection in humans in the country. This study highlights the necessity to increase the awareness of TBE among physicians and perform active and systematic screening of TBEV antibodies among patients with viral meningitis and/or encephalitis.
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- 2022
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11. Changing epidemiology of catheter-related bloodstream infections in neutropenic oncohematological patients.
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Lendak D, Puerta-Alcalde P, Moreno-García E, Chumbita M, García-Pouton N, Cardozo C, Morata L, Suárez-Lledó M, Hernández-Meneses M, Ghiglione L, Marco F, Martinez JA, Mensa J, Urošević I, Soriano A, and Garcia-Vidal C
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- Adult, Aged, Catheter-Related Infections drug therapy, Catheter-Related Infections microbiology, Drug Resistance, Multiple, Bacterial, Female, Gram-Negative Bacterial Infections drug therapy, Gram-Negative Bacterial Infections microbiology, Hematologic Neoplasms drug therapy, Hematologic Neoplasms microbiology, Humans, Male, Middle Aged, Neutropenia blood, Neutropenia drug therapy, Prospective Studies, Risk Factors, Spain epidemiology, Catheter-Related Infections epidemiology, Gram-Negative Bacterial Infections epidemiology, Hematologic Neoplasms pathology, Neutropenia pathology
- Abstract
Background: We aimed to describe the epidemiology of catheter-related bloodstream infections (CRBSIs) in onco-hematological neutropenic patients during a 25-year study period, to evaluate the risk factors for Gram-negative bacilli (GNB) CRBSI, as well as rates of inappropriate empirical antibiotic treatments (IEAT) and mortality., Materials/methods: All consecutive episodes of CRBSIs were prospectively collected (1994-2018). Changing epidemiology was evaluated comparing five-year time spans. A multivariate regression model was built to evaluate risk factors for GNB CRBSIs., Results: 482 monomicrobial CRBSIs were documented. The proportion of CRBSIs among all BSIs decreased over time from 41.2% to 15.8% (p<0.001). CRBSIs epidemiology has been changing: the rate of GNB increased over time (from 11.9% to 29.4%; p<0.001), as well as the absolute number and rate of multidrug-resistant (MDR) GNB (from 9.5% to 40.0%; p = 0.039). P. aeruginosa increased and comprised up to 40% of all GNB. Independent factors related with GNB-CRBSIs were: longer duration of in-situ catheter (OR 1.007; 95%CI 1.004-1.011), older age (OR 1.016; 95%CI 1.001-1.033), prior antibiotic treatment with penicillins (OR 2.716; 95%CI 1.306-5.403), and current antibiotic treatment with glycopeptides (OR 1.931; 95%CI 1.001-3.306). IEATs were administered to 30.7% of patients, with the highest percentage among MDR P. aeruginosa (76.9%) and S. maltophillia (92.9%). Mortality rate was greater among GNB than GPC-CRBSI (14.4% vs 5.4%; p = 0.002), with mortality increasing over time (from 4.5% to 11.2%; p = 0.003)., Conclusion: A significant shift towards GNB-CRBSIs was observed. Secondarily, and coinciding with an increasing number of GNB-MDR infections, mortality increased over time., Competing Interests: CG-V has received honoraria for talks on behalf of Gilead Science, Merck Sharp and Dohme, Pfizer, Jannsen, Novartis, Lilly and a grant support from Gilead Science and Merck Sharp and Dohme. AS has received honoraria for talks on behalf of Merck Sharp and Dohme, Pfizer, Novartis, Angellini, and grant support from Pfizer. JM has received honoraria for talks on behalf of Merck Sharp and Dohme, Pfizer, Novartis, and Angellini. PP-A has received honoraria for talks on behalf of Pfizer. This does not alter our adherence to PLOS ONE policies on sharing data and materials.
- Published
- 2021
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12. Neurometabolic Remodeling in Chronic Hiv Infection: a Five-Year Follow-up Multi-Voxel Mrs Study.
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Boban J, Thurnher MM, Brkic S, Lendak D, Bugarski Ignjatovic V, Todorovic A, and Kozic D
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- Adult, Algorithms, Anti-HIV Agents therapeutic use, Aspartic Acid analogs & derivatives, Brain Neoplasms metabolism, Cell Communication, Cell Proliferation, Choline, Creatine, Follow-Up Studies, HIV Infections physiopathology, Humans, Inflammation, Longitudinal Studies, Magnetic Resonance Spectroscopy, Male, Microglia metabolism, Middle Aged, Models, Statistical, Neuroglia metabolism, Neuroimaging, Neuronal Plasticity, Neurons metabolism, Brain diagnostic imaging, HIV Infections diagnostic imaging, HIV Infections drug therapy
- Abstract
There is a lack of data about the long-term follow-up changes in neurometabolic profile and neuropsychological performance of HIV-positive subjects under continuous antiretroviral therapy (cART). The aim of the study was to assess changes in neurometabolic profile in chronically-infected, HIV-positive subjects during a five-year follow-up period, using multi-voxel proton magnetic resonance spectroscopy (
1 H-MRS). Nineteen neurologically asymptomatic, aviremic, HIV-positive subjects, underwent multi-voxel 2D MRS on a 3 T MR unit and synchronous neurocognitive assessment in a five-year follow-up period. Twelve voxels were placed in prefrontal cortices, anterior and posterior cingulate gyrus, intraparietal sulci, and frontal centrum semiovale white matter, to identify peaks of N-acetyl-aspartate (NAA), creatine (Cr), choline (Cho), and myoinositol (mI). Ratios of NAA/Cr, NAA/Cho, NAA/mI, mI/Cr, and Cho/Cr were analyzed. Longitudinal differences in ratios and neurocognitive scores were tested with the Wilcoxon signed-rank-test. Statistical significance was set at p ≤ 0.004 significant, and 0.05 > p > 0.004 trending toward significance. A significant longitudinal increase in NAA/Cr ratio was observed in 5/12 voxels, while there was a trend toward significance in an additional three. The increase in Cho/Cr reached statistical significance in one voxel. Changes in the mI/Cr ratio demonstrated a significant increase in 4/12 voxels. A progressive increase in NAA/Cr, followed by better neurocognitive performance, may be an indicator of brain plasticity in the setting of chronic HIV-related neuronal injury. A progressive mI/Cr increase could be partly explained by glial proliferation due to functional compartment remodeling and partly attributable to insufficient control of persistent neuroinflammation by cART.- Published
- 2019
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13. Endothelial biomarkers in the light of new sepsis definition.
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Mihajlovic D, Brkic S, Lendak D, Mikic AN, Draskovic B, and Mitic G
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- Adult, Aged, Biomarkers metabolism, Female, Humans, Male, Middle Aged, ROC Curve, Endothelium metabolism, Sepsis diagnosis, Sepsis metabolism
- Abstract
The aim of our study was to compare usefulness of endothelial biomarkers for severity and outcome prediction in patients with positive Sepsis-3 criteria with traditionally used biomarkers. A total of 150 patients were included in our study. Patients were divided into two groups: patients with sepsis and those with infectious systemic inflammatory response syndrome. Development of septic shock and 28-day mortality were assessed. Endocan and thrombomodulin showed better discriminative power than procalcitonin for the presence of sepsis. Endocan showed good discriminative power for septic shock prediction. Addition of endocan significantly contributed to sequential (sepsis-related) organ failure assessment score in logistic regression model. Conclusion: Endothelial biomarkers have a good diagnostic potential for sepsis. Endocan is useful as a predictor of the severity and fatality of sepsis.
- Published
- 2019
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14. Complement component consumption in sepsis correlates better with hemostatic system parameters than with inflammatory biomarkers.
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Lendak D, Mihajlovic D, Mitic G, Ubavic M, Novakov-Mikic A, Boban J, and Brkic S
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- Adolescent, Adult, Aged, Aged, 80 and over, Blood Coagulation, Female, Hemostasis, Humans, Male, Middle Aged, Young Adult, Biomarkers blood, Blood Coagulation Tests methods, Sepsis blood
- Abstract
Introduction: The aim of this study was to investigate the role of C3 and C4 complement components in prediction of sepsis outcome. The secondary aim was to determine relationship between complement components and other inflammatory parameters, and parameters of hemostasis., Methods: One-hundred-thirty-seven patients with sepsis (Sepsis-3 criteria) were included in the study. Routine laboratory markers, predictive APACHEII and SOFA scores, concentrations of C3 and C4, activated partial thromboplastin time (aPTT), prothrombin time (PT), thrombin time (TT), fibrinogen, antithrombin (AT), protein C (PC), protein S (PS), endogenous thrombin potential (ETP), thrombomodulin, and D-dimer were available. Concentrations of C3 and C4 were correlated with the disease outcome, predictive scores, inflammatory markers and parameters of hemostasis. Statistical analysis was performed using the non-parametric approach and significance was set at p < 0.05., Results: A significant depletion of the complement was observed in non-survivors (AUCROC
C3 = 0.692, pC3 < 0.001,AUCROCC4 = 0.672, pC4 = 0.001). There was a significant negative correlation of C3and C4with APACHEII and SOFA (C3-APACHEII ρ = -0.364, p = 0.011, C3-SOFA ρ = -0.460, p < 0.001), aPTT (ρ = -0.407, p < 0.001), PT (ρ = -0.408, p < 0.001), and D-dimer (ρ = -0.274, p = 0.001). A significant positive correlation was observed with natural anticoagulants (C3-AT ρ = 0.493, p < 0.001; C3-PC ρ = 0.450, p < 0.001; C3-PS ρ = 0.345, p < 0.001), fibrinogen (ρ = 0.481, p < 0.001),and ETP (ρ = 0.384, p < 0.001). C3 and C4 correlated significantly only with CRP (ρ = 0.207, p = 0.015), while no significant correlations with procalcitonin and WBC were detected. Results were similar for C4 and C3, although C3 presented higher correlation coefficients., Conclusion: In septic patients with poorer outcome, a significant depletion of the complement system was observed. Concentrations of complement components demonstrated stronger correlations with coagulation parameters than with inflammatory biomarkers., (Copyright © 2018 Elsevier Ltd. All rights reserved.)- Published
- 2018
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15. HIV-associated neurodegeneration and neuroimmunity: multivoxel MR spectroscopy study in drug-naïve and treated patients.
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Boban J, Kozic D, Turkulov V, Ostojic J, Semnic R, Lendak D, and Brkic S
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- Adult, Aspartic Acid analysis, Biomarkers analysis, Brain metabolism, Case-Control Studies, Choline analysis, Creatine analysis, Female, Humans, Male, Middle Aged, Neurodegenerative Diseases etiology, Retrospective Studies, White Matter diagnostic imaging, Young Adult, AIDS Dementia Complex diagnostic imaging, Brain diagnostic imaging, HIV Infections complications, Magnetic Resonance Spectroscopy methods, Neurodegenerative Diseases diagnostic imaging
- Abstract
Objectives: The aim of this study was to test neurobiochemical changes in normal appearing brain tissue in HIV+ patients receiving and not receiving combined antiretroviral therapy (cART) and healthy controls, using multivoxel MR spectroscopy (mvMRS)., Methods: We performed long- and short-echo 3D mvMRS in 110 neuroasymptomatic subjects (32 HIV+ subjects on cART, 28 HIV+ therapy-naïve subjects and 50 healthy controls) on a 3T MR scanner, targeting frontal and parietal supracallosal subcortical and deep white matter and cingulate gyrus (NAA/Cr, Cho/Cr and mI/Cr ratios were analysed). The statistical value was set at p < 0.05., Results: Considering differences between HIV-infected and healthy subjects, there was a significant decrease in the NAA/Cr ratio in HIV+ subjects in all observed locations, an increase in mI/Cr levels in the anterior cingulate gyrus (ACG), and no significant differences in Cho/Cr ratios, except in ACG, where the increase showed trending towards significance in HIV+ patients. There were no significant differences between HIV+ patients on and without cART in all three ratios., Conclusion: Neuronal loss and dysfunction affects the whole brain volume in HIV-infected patients. Unfortunately, cART appears to be ineffective in halting accelerated neurodegenerative process induced by HIV but is partially effective in preventing glial proliferation., Key Points: • This is the first multivoxel human brain 3T MRS study in HIV. • All observed areas of the brain are affected by neurodegenerative process. • Cingulate gyrus and subcortical white matter are most vulnerable to HIV-induced neurodegeneration. • cART is effective in control of inflammation but ineffective in preventing neurodegeneration.
- Published
- 2017
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16. Endogenous thrombin potential as marker of procoagulant response that can be useful in early stage of sepsis.
- Author
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Mihajlovic D, Brkic S, Lendak D, Novakov Mikic A, Draskovic B, and Mitic G
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- Adolescent, Adult, Aged, Aged, 80 and over, Biomarkers blood, Female, Hemostasis, Humans, Male, Middle Aged, Multiple Organ Failure, Prognosis, ROC Curve, Sepsis blood, Severity of Illness Index, Young Adult, Blood Coagulation, Sepsis diagnosis, Thrombin biosynthesis
- Abstract
: Sepsis is associated with complex procoagulant and anticoagulant changes that modify inflammatory response. Identification of coagulation markers that can differentiate useful procoagulant response from adverse alteration of clotting mechanism in patient with sepsis. In total, 150 patients who fulfilled criteria for diagnosis of sepsis were included in this study. Patients were categorized in two groups according to sepsis severity in the first 24 h from intensive care unit admission: sepsis and septic shock. In total, 28-day mortality was assessed. Platelet count, activated partial thromboplastin time, prothrombin time, D-dimer, fibrinogen, protein C, protein S, antithrombin levels, and endogenous thrombin potential were determined within first 24 h from ICU admission. Differences between groups of septic patients were assessed by Mann-Whitney U test. Categorical variables were compared using χ test. Receiver operating characteristic curves were plotted to determine predictive values of variables for sepsis severity prediction. Activated partial thromboplastin time and prothrombin time were significantly prolonged with higher D-dimer, lower fibrinogen, and natural anticoagulant levels (protein C, protein S, and antithrombin) in patients with more severe form of the disease and worse outcome (P < 0.05). Endogenous thrombin potential [area under the curve (AUC) %] was significantly decreased in patients with more severe form of sepsis (66.01 ± 41.51 vs. 83.21 ± 28.83; AUC 0.76) and in patients with worse outcome (67.66 ± 37.79 vs. 81.79 ± 32.15; AUC 0.68; P < 0.05). Evaluation of initial thrombin generation is useful to distinguish between beneficial coagulation activation and hazardous haemostatic alteration, and to predict multiorgan dysfunction development and poor outcome in septic patients.
- Published
- 2017
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17. Neuroendocrine disorder in chronic fatigue syndrome
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Tomic S, Brkic S, Lendak D, Maric D, Medic Stojanoska M, and Novakov Mikic A
- Abstract
Background/aim: Neuroendocrine disorders are considered a possible pathogenetic mechanism in chronic fatigue syndrome (CFS). The aim of our study was to determine the function of the hypothalamic-pituitary-adrenal axis (HPA) and thyroid function in women of reproductive age suffering from CFS. Materials and methods: The study included 40 women suffering from CFS and 40 healthy women (15-45 years old). Serum levels of cortisol (0800 and 1800 hours), ACTH, total T4, total T3, and TSH were measured in all subjects. The Fibro Fatigue Scale was used for determination of fatigue level. Results: Cortisol serum levels were normal in both groups. The distinctively positive moderate correlation of morning and afternoon cortisol levels that was observed in healthy women was absent in the CFS group. This may indicate a disturbed physiological rhythm of cortisol secretion. Although basal serum T4, T3, and TSH levels were normal in all subjects, concentrations of T3 were significantly lower in the CFS group. Conclusion: One-time hormone measurement is not sufficient to detect hormonal imbalance in women suffering from CFS. Absence of a correlation between afternoon and morning cortisol level could be a more representative factor for detecting HPA axis disturbance.
- Published
- 2017
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18. Proton Chemical Shift Imaging Study of the Combined Antiretroviral Therapy Impact on Neurometabolic Parameters in Chronic HIV Infection.
- Author
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Boban J, Kozic D, Turkulov V, Lendak D, Bjelan M, Semnic M, and Brkic S
- Subjects
- Adult, Anti-HIV Agents therapeutic use, Aspartic Acid analysis, Aspartic Acid metabolism, Brain metabolism, Brain pathology, Choline analysis, Choline metabolism, Chronic Disease, Creatine analysis, Creatine metabolism, Female, HIV Infections drug therapy, Humans, Magnetic Resonance Spectroscopy methods, Male, Middle Aged, Protons, HIV Infections metabolism, HIV Infections pathology, Magnetic Resonance Imaging methods
- Abstract
Background and Purpose: The introduction of combination antiretroviral therapy has failed to reduce the high prevalence of mild forms of HIV-associated neurocognitive disorders. The aim of this study was to test the effect of combined antiretroviral therapy on brain metabolite ratios in chronic HIV infection by using proton chemical shift imaging., Materials and Methods: We performed 2D chemical shift imaging in 91 subjects (31 HIV+ patients with chronic infection on combination antiretroviral therapy, 19 combination antiretroviral therapy-naïve HIV+ subjects with chronic infection, and 41 healthy controls), covering frontal and parietal subcortical white and cingulate gyrus gray matter, analyzing ratios of NAA/Cr and Cho/Cr on long-TE and mIns/Cr on short-TE MR spectroscopy. We correlated neurometabolic parameters with immunologic, clinical, data and combined antiretroviral therapy efficacy scores., Results: There was a significant decrease in NAA/Cr ( P < .05) in HIV-positive patients on and without combined antiretroviral therapy, compared with healthy controls in all locations. There were significant differences in Cho/Cr ( P < .05) and mIns/Cr ( P < .05) ratios between HIV+ patients on and without therapy, compared with healthy controls, but these differed in distribution. There were no significant differences in brain metabolite ratios between the 2 groups of chronically HIV-infected patients. The CNS penetration efficacy score showed weak positive correlations only with Cho/Cr ratios in some locations., Conclusions: The impact of combined antiretroviral therapy on the process of neuronal loss and dysfunction in chronic HIV infection appears to be suboptimal in successful peripheral suppression of viral replication. Spectroscopic imaging might be a useful tool for monitoring the effects of different combined antiretroviral therapy regimens on brain metabolite ratios., (© 2017 by American Journal of Neuroradiology.)
- Published
- 2017
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19. Chronic Hepatitis C and Alcohol Abuse: The Single Center Experience of Novi Sad - Serbia.
- Author
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Preveden T, Ruzic M, Lendak D, Pete M, Abenavoli L, and Brkic S
- Subjects
- Adult, Alcoholism pathology, Antiviral Agents therapeutic use, Cross-Sectional Studies, Female, Hepatitis C, Chronic drug therapy, Humans, Interferons therapeutic use, Male, Middle Aged, Retrospective Studies, Ribavirin therapeutic use, Serbia, Sustained Virologic Response, Alcoholism complications, Hepatitis C, Chronic complications, Hepatitis C, Chronic pathology
- Abstract
Background: Chronic ethyl alcohol consuming is well known independent negative predictor of unfavorable natural course and therapy outcome of Chronic Hepatitis C (CHC) infection., Objective: The aim of the present study was to clarify the impact of alcohol consumption on fibrosis rate progression in patients with CHC and Sustained Virologic Response (SVR) rates in patients undergoing treatment with pegylated interferon and ribavirin., Method: This cross sectional retrospective study included 807 CHC patients underwent liver biopsy and hospitalized at Clinical center of Vojvodina, Novi Sad, Serbia. According to the alcohol consumption equal or greater than 50 g/day prior to liver biopsy, patients were divided into two groups. We compared demographic, clinical, virologic and histopathological markers of CHC, as well as response to antiviral therapy., Results: We find statistically significant difference (p=0.001) in gender, but not in age (p=0.081), estimated duration of the CHC (p=0.470) and hepatitis C genotype (p=0.545) between two groups. Among patients with CHC who consume alcohol ≥50 g/day there were significantly higher incidence of intravenous drug users (p=0.000). Binary logistic regression showed that the only independent predictors of moderate to severe fibrosis (fibrosis ≥2) were age (p=0.000) and alcohol use (p=0.027). There was not statistically significant difference in SVR rate between two groups (p=0.810)., Conclusion: We believe that this good result in treatment outcome was the consequence of proper selection of patients based primarily on regulations of Republic of Serbia on the necessity of abstinence from the use of alcohol and psychoactive substances at least one year before starting antiviral therapy.
- Published
- 2016
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20. Non-cirrhotic Portal Hypertension Associated with Didanosine and Streptococcus agalactiae Infection: A Case Report.
- Author
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Turkulov V, Ruzic M, Lendak D, Maric D, Brkic S, and Abenavoli L
- Subjects
- HIV Infections, Humans, Male, Streptococcal Infections drug therapy, Streptococcus agalactiae, Antiviral Agents adverse effects, Didanosine adverse effects, Hypertension, Portal complications, Streptococcal Infections complications
- Abstract
Background: Non-Cirrhotic Portal Hypertension (NCPH) is a rare but potentially fatal liver disorder described in patients treated with anti-retroviral therapy for Human Immunodeficiency Virus (HIV). In particular, the most important predisposing factor to its development has been identified as prolonged exposure to Didanosine (ddI). The clinical entity of NCPH is characterized by an increase in portal pressure due to pre- or intra-hepatic causes, in absence of liver cirrhosis. However, the exact pathogenesis remains poorly understood, and due to its rarity, the diagnosis is often delayed., Objective: We herein report a case in which ddI administration, with concomitant spontaneous bacterial peritonitis by Streptococcus agalactiae, has induced NCPH in a HIV male patient., Conclusion: NPCH should be suspected when HIV patient with an history of ddI treatment presents liver decompensation.
- Published
- 2016
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21. Prognostic value of hemostasis-related parameters for prediction of organ dysfunction and mortality in sepsis.
- Author
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Mihajlovic D, Lendak D, Mitic G, Cebovic T, Draskovic B, Novakov A, and Brkic S
- Subjects
- APACHE, Adult, Aged, Aged, 80 and over, Blood Coagulation Tests, Cohort Studies, Female, Humans, Male, Middle Aged, Multiple Organ Failure etiology, Prognosis, Sepsis complications, Sepsis epidemiology, Shock, Young Adult, Hemostasis, Multiple Organ Failure epidemiology, Sepsis mortality, Sepsis physiopathology
- Abstract
Background/aim: Clinical manifestations of sepsis are not caused directly by the invading pathogens, but rather mostly by systemic inflammation that leads to activation of the coagulation system. The aim of this study was to determine whether levels of hemostasis- related parameters measured in intensive care unit admissions are associated with mortality and severity in patients with sepsis., Materials and Methods: Eighty-five patients who fulfilled criteria for a diagnosis of sepsis were included in our study. Platelet count, activated partial thromboplastin time (aPTT), prothrombin time (PT), thrombin time, D-dimer, and fibrinogen levels were determined within the first 24 h from sepsis onset. Differences between groups of septic patients were assessed by Mann-Whitney U test and Kruskal-Wallis test. Logistic regression analysis was performed to test the joint effect of different predictors., Results: Prolonged aPTT and PT with higher D-dimer concentrations in patients with sepsis are associated with more severe forms of the disease, aPTT was prolonged in nonsurvivors, while platelet count and fibrinogen levels were higher in survivors. Platelet count and aPTT ratio are independent predictors of fatal outcome in our logistic regression model., Conclusion: Hemostasis-related parameters have a significant impact on severity and outcome in sepsis.
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- 2015
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22. [Rash in primary Epstein-Barr virus infection].
- Author
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Lendak D, Mihajlović D, Turkulov V, Stefan Mikić S, and Tomiç S
- Subjects
- Adolescent, Adult, Anti-Bacterial Agents adverse effects, Child, Child, Preschool, Diagnosis, Differential, Drug Eruptions diagnosis, Exanthema chemically induced, Exanthema diagnosis, Female, Humans, Infant, Infectious Mononucleosis complications, Infectious Mononucleosis drug therapy, Infectious Mononucleosis virology, Male, Young Adult, Exanthema complications, Infectious Mononucleosis diagnosis
- Abstract
Introduction: Rash can be one of the symptoms in acute infectious mononucleosis. According to the classical literature sources, drug-induced rash can be associated with synthetic penicillin and Epstein-Barr virus itself Nowadays, a lot of case reports point to the development of rash after the administration of other groups of antimicrobials. Clinical and laboratory signs and the administration of antimicrobials in acute Epstein-Barr virus infection have been correlaed with the development of rash., Material and Methods: This retrospective-prospective study (2007-2010) included 243 patients hospitalized for acute infectious mononucleosis at the Department for Infectious Diseases, Clinical Center of Vojvodina, of whom 51 had rash and 192 were without it. Epstein-Barr virus infection was confirmed by ELISA IgM EBV VCA in all patients., Results: Student's t-test did not show a significant difference between the age, gender, duration of symptoms, leucocytes count, absolute lymphocytes count, alanine aminotransferase, aspartate aminotransferase among patients with or without rash. Chi2 test did not show a significant difference among the patients treated by synthetic or pure penicillin, macrolids and 1st and 2nd generation cephalosporins. However, if we compare all these antimicrobials, there is a significant difference between them and 3rd generation cephalosporins. Only two patients developed rash without antimicrobials., Conclusion: According to our results, rash developed independently of the clinical course of disease. Previous conclusion that synthetic penicillin produces rash seems to be not true, because there are many patients who were treated with them but did not develop rash. All antimicrobials can be associated with rash, but 3rd generation cephalosporins seem to produce rash less frequently than the others.
- Published
- 2012
- Full Text
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