Publications by authors named "Wojciech Kupczyk"

Introduction: Metabolic/bariatric surgery is the only proven treatment for type 2 diabetes mellitus (T2D) with curative intent. However, in a number of patients, the surgery is not effective or they may experience a relapse. Those patients can be offered re-do bariatric surgery (RBS).

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Breath and fecal VOCs, among others, represent a new and encouraging clinical practice for the differential diagnosis of CRC. The purpose of our research was to identify VOCs present in exhaled air and feces of 20 HVs and 15 CRC patients. For collection of gas phase released from feces, emission microchambers were applied.

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The polymicrobial nature of diabetic foot infection (DFI) makes accurate identification of the DFI microbiota, including rapid detection of drug resistance, challenging. Therefore, the main objective of this study was to apply matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI TOF MS) technique accompanied by multiply culture conditions to determine the microbial patterns of DFIs, as well as to assess the occurrence of drug resistance among Gram-negative bacterial isolates considered a significant cause of the multidrug resistance spread. Furthermore, the results were compared with those obtained using molecular techniques (16S rDNA sequencing, multiplex PCR targeting drug resistance genes) and conventional antibiotic resistance detection methods (Etest strips).

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Article Synopsis
  • The study utilized MALDI-TOF MS to identify changes in the salivary microbiome due to different antibiotic therapies, revealing significant variations in bacterial composition between antibiotic-treated and non-treated groups.
  • It found that specific antibiotics resulted in unique molecular profiles, with the highest diversity of bacterial species occurring in a universal culture medium.
  • The research suggests that MALDI-TOF MS could enable faster diagnoses and more personalized treatment plans by monitoring individual responses to antibiotics based on detailed microbiota analysis.
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Background: Although endoscopic treatment of symptomatic post-inflammatory pancreatic and peripancreatic fluid collections (PPPFCs) is an established treatment method, some aspects of endotherapy and periprocedural management remain controversial. The role of antibiotics is one of the most controversial issues in interventional endoscopic management of local complications of pancreatitis.

Methods: This study was a randomized, non-inferiority, placebo-controlled, and double-blinded clinical trial to investigate the role of antibiotic prophylaxis in endoscopic transmural drainage in patients with symptomatic non-infected PPPFCs and assess the influence of antibiotic treatment on the results of endotherapy in patients with symptomatic infected PPPFCs.

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Introduction: Revisional surgery is more technically challenging and associated with increased morbidity and mortality. Nevertheless, the frequency of revisional bariatric surgery (RBS) is increasing. Therefore, investigating this group of patients appears to be currently valid.

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The aim of this study was to develop an innovative method of examining bacterial survival using capillary zone electrophoresis (CZE) and flow cytometry (FC) as a reference method. For this purpose, standard strains of bacteria from the ATCC collection were used: ATCC 14506, ATCC 11632, ATCC 10031, ATCC 27853, and ATCC 25922, as well as seven antibiotics with different antimicrobial mechanisms of action. The ratio of live and dead cells in the tested sample in CZE measurements were calculated using our algorithm that takes into account the detection time.

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The main goal of the study was to evaluate the usefulness of the culturomics approach in the reflection of diabetic foot infections (DFIs) microbial compositions in Poland. Superficial swab samples of 16 diabetic foot infection patients (Provincial Polyclinical Hospital in Toruń, Poland) were subjected to culturing using 10 different types of media followed by the identification via the matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) and Biotyper platform. Identified 204 bacterial isolates representing 18 different species-mostly (63%) and (44%).

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The bacterial infection of post-operative wounds is a common health problem. Therefore, it is important to investigate fast and accurate methods of identifying bacteria in clinical samples. The aim of the study was to analyse the use of the MALDI-TOF MS technique to identify microorganism wounds that are difficult to heal.

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The purpose of this study was to create an alternative protocol for the DNA-based identification of salivary microbiota focused on the distinguishing of species. Salivary bacteria were identified using 16S rDNA sequencing and proteins and lipids profiling using MALDI-TOF/MS as well as FTIR analysis.  Most of the isolates belonged to streptococci - mostly the salivarious group indistinguishable by the molecular technique.

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Unlabelled: Poland is high on a list of countries affected by epidemics of obesity, a problem that has especially suddenly increased in the post-transformation period.

Materials And Method: Documentation of 115 subsequent patients diagnosed with grade 3 obesity, considered eligible for surgical treatment, was analysed since 2015. A subgroup of 68 patients was selected from this group and the included patients who decided to cancel their treatment at various stages.

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This work reports the effect of silver bionanoparticles (Bio(AgNPs) synthesized by Actinobacteria CGG 11n on selected Gram (+) and Gram (-) bacteria. Flow cytometry, classical antibiogram method and fluorescent microscopy approach was used for evaluation of antimicrobial activity of Bio(AgNPs) and their combination with antibiotics. Furthermore, the performed research specified the capacity of flow cytometry method as an alternative to the standard ones and as a complementary method to electromigration techniques.

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A surgical site infection (SSI) is an infection that occurs after surgery in the part of the body where the surgery took place. A SSI may range from a spontaneously limited wound discharge within 7-10 days of an operation to a life-threatening postoperative complication, such as a sternal infection after open heart surgery. Most surgical site infections are caused by contamination of an incision with microorganisms from the patient's own body during surgery.

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To assess the bacteria-antibiotic interactions in patients with postoperative wound infections, a simple electrophoretic test was performed. To estimate the effectiveness of the antibiotic therapy and to prepare 3-day profiles of bacteria "quantity" in biological samples, CE was used. As our team demonstrated earlier, the method is easy and fast, sample pretreatment is not necessary, and it is characterized by high selectivity.

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Background: The basic clinical problem associated with infection treatment is the fact that classic, commonly and routinely used isolation and identification methods are based on long-term processes of a phenotypic analysis of microorganisms. Consequently sometimes, especially in small centres, rapid implementation of antibacterial treatment becomes delayed.The work presents the initial results of rapid microbiological identification based on an original method of capillary zone electrophoresis (CZE).

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Unlabelled: One of non-invasive methods of Helicobacter pylori diagnostics is the breath test with urea 13C.

The Aim: of the study was to estimate the sensitivity and specificity of urea breath test (UBT) in Helicobacter pylori (Hp) infection diagnosis among children and youth.

Patients And Methods: medical records of 100 patients, hospitalised due to gastrointestinal disorders, between 3 and 18 years of age were analysed.

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Alcoholism is the main etiological factor of hepatic cirrhosis among adults whereas among children the following pathologies lead to hepatic cirrhosis: bile ducts disease (atresia or hypoplasia of bile ducts, progressive familial intrahepatic cholestasis), metabolic disorders (tyrosinemia, hemochromatosis, galactosemia, alpha1 - antitrypsin deficiency, Wilson's disease), chronic viral hepatitis B, delta, C, autoimmune hepatitis. Despite the availability of modern diagnostic methods scanty clinical symptomatology may be a cause of late diagnosis, often in the stage of complications. Presented case of a 14 years old boy is an example of late diagnosis of cryptogenic hepatic cirrhosis.

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