To compare cerebrospinal fluid (CSF) and serum transferrin (Tf) concentrations, transferrin quotient and index in various subgroups of MS patients. CSF and serum transferrin concentrations, transferrin quotient QTf (i.e. CSF transferrin/serum transferrin x 10(3)) and index (QTf/Qalbumin) were determined in a group of 51 patients with clinically definite or probable multiple sclerosis (MS). Patients were subdivided according to the disease form (relapsing-remitting = RR, secondary progressive = SP, primary progressive = PP; patients with RR form were further subdivided into those in the attack and those in remission), disease severity (EDSS 0-5.5, EDSS 6.0-10.0), its treatment (non-treated - including patients treated with vitamins and/ or vasodilators only, treated - i.e. glucocorticoids and/or immunosuppressants and/or (exceptionally) beta-interferon), disease duration (0-2 years, >2-10 years, > 10 years) and sex. Correlation of transferrin values with age was also performed. Serum transferrin was somewhat lower and significantly more frequently subnormal in PP patients in comparison with the SP form and the RR form in remission. Transferrin index was significantly higher in the PP form than in the RR as well as the SP form. Transferrin quotient was significantly more frequently subnormal in patients in remission compared to those in the attack of the RR disease. CSF transferrin as well as transferrin quotient were more frequently subnormal in patients with short disease duration (0-2 years) than in patients with longer disease duration; these parameters, however, correlated also significantly with age. CSF transferrin and transferrin quotient were higher in male than in female patients. The authors conclude that evaluation of transferrin in MS patients - along with albumin - may help to differentiate among various MS subgroups, since there are significant differences among RR, SP and PP forms. For this purpose, however, other CSF protein fractions should be evaluated in parallel in order to obtain more complex information and to establish a panel of examinations enabling multiple statistical analyses. Transferrin evaluation in MS may also be of significant theoretical interest, since transferrin is known to be involved in the regulation of iron metabolism and it may have a protective role against the oxidative stress. Moreover, transferrin is a growth factor important for proliferation of activated T lymphocytes. By means of the use of transferrin quotient and especially transferrin index, it may be possible to estimate the proportion of intra-CNS-synthesized transferrin and/or rate of specific transferrin transport across the blood-CSF barrier. Further studies are, however, needed for such an evaluation.

The concentrations of glucose and lactate in cerebrospinal fluid (CSF) provide important information about energy metabolism in the CSF compartment. To improve our understanding of this information we introduced a new parameter resulting from a formula for calculating the fictitious production of adenosine triphosphate, i.e., the coefficient of energy balance (KEB). We evaluated cytology, the concentrations of glucose and lactate and the KEB in the CSF of 948 patients, who were divided into five groups. For statistical analysis we used the Kruskal-Wallis test with post-hoc analysis using the Dunn method and multinomial regression analysis. We determined the specificities and sensitivities of the cytological pictures and the KEB. A KEB>28.0 corresponded to normal energy metabolism in the CSF. A KEB<28.0 corresponded to an increased level of anaerobic metabolism in the CSF during inflammation in the CNS. A KEB<10.0 corresponded to a high level of anaerobic metabolism in the CSF during severe inflammation with an oxidative burst of professional phagocytes in the CNS. The KEB parameter increased the specificities of cytological examinations of the CSF in all cases. The KEB represents an equation for calculating the fictitious average number of ATP molecules produced in the CSF compartment from one molecule of glucose, and we used it successfully as a new parameter for evaluating energy metabolism status in the CSF.

Human toxocariasis is a helminthozoonosis caused by the migration of Toxocara species larvae through an organism. The infection in humans is transmitted either by direct ingestion of the eggs of the parasite, or by consuming undercooked meat infested with Toxocara larvae. This parasitosis can be found worldwide, but there are significant differences in seroprevalence in different areas, depending mainly on hot climate conditions and on low social status. However, the literature estimates of seroprevalence are inconsistent. Infected patients commonly present a range of symptoms, e.g., abdominal pain, decreased appetite, restlessness, fever, and coughing. This manuscript presents a case report of a polytraumatic patient who underwent a two-phase spinal procedure for a thoracolumbar fracture. After the second procedure, which was a vertebral body replacement via thoracotomy, the patient developed a pathologic pleural effusion. A microscopic cytology examination of this effusion revealed the presence of Toxocara species larvae. Although the patient presented no specific clinical symptoms, and the serological exams (Enzyme–linked immunosorbent assay (ELISA), Western blot) were negative, the microscopic evaluation enabled a timely diagnosis. The patient was successfully treated with albendazole, with no permanent sequelae of the infection.

The predominance of neutrophils in pleural effusions of patients with different serious impairments of the pleural cavity organs is often found. The aim of this study was to identify the type of injury using the cytological-energy analysis of pleural effusions. We analysed 635 samples of pleural effusions with predominance of neutrophils. We compared the values of the coefficient of energy balance (KEB), lactate dehydrogenase (LDH) and aspartate aminotransferase (AST) catalytic activities in the following subgroups of patients: with transudative effusions, purulent pneumonia, chest empyema and after chest surgery with and without purulent complications. Statistical analysis was performed using the ANOVA Kruskal–Wallis test (p < 0.05 was considered as significant). We found the lowest KEB values in pleural effusions of patients with chest empyema and their gradual increases in patients with purulent pneumonia and with transudative effusions. We observed the highest LDH and AST enzymes activity in patients with chest empyema and their gradual decrease in patients with purulent pneumonia and with transudative effusions. LDH and AST enzymes activity was significantly higher in pleural effusions of patients after chest surgery with purulent complications compared with non-purulent cases. The most intensive inflammation and the most extensive tissue destruction in the pleural cavity were found in patients with chest empyema. Significantly better parameters were observed in patients with purulent pneumonia. The absence of serious inflammation and the absence of tissue destruction were typical for patients with transudative effusions. Finally, our results confirmed an anticipated higher tissue destruction in patients after chest surgery. Significantly worse injury was found in surgical patients with purulent complications compared with non-purulent ones. The reviews of this paper are available via the supplemental material section.