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    The resistance to major antituberculous drugs of mycobacterium tuberculosis strains isolated from the respiratory system specimens of tuberculosis patients in Duzce, Turkey
    (Natl Inst Infectious Diseases, 2005) Öztürk, C. Elif; Balbay, Öner A.; Kaya, Demet; Ceyhan, İsmail; Bulut, İsmet; Şahin, İdris
    Though generally curable, tuberculosis (TB) is becoming increasingly resistant to commonly used antibiotics. Drug-resistant and multidrug-resistant (MDR)-TB is a consequence of monotherapy, insufficient drug therapy and national TB control programs. The present study was designed to reveal the resistance to major antimicrobial drugs (isoniazid [INH], streptomycin [SM], ethambutol [EMB], and rifampicin [RIF]) of Mycobacterium tuberculosis isolated from the respiratory specimens of TB patients in Duzce, Turkey. A total of 62 TB patients (46 male, 16 female; age: 17-75 mean: 42 +/- 15.9) were included in the study; 52 (83.8%) were new cases and susceptible to all anti-TB drugs, while 10 (16.2%) were previously treated cases. Antimicrobial susceptibility tests were performed by the proportion method in Lowenstein-Jensen medium. Fifty-two of the 62 (83.8%) isolated M. tuberculosis strains were found to be susceptible to all drugs, and 7 (11.3%), 5 (8%), and 3 (4.8%) were resistant to SM, INH, and RIF, respectively; 3 (4.8%) were MDR. There were no EMB-resistant strains. The results of this study. show the presence of drug-resistant and MDR strains of TB at Duzce in the northwest part of Turkey.
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    Thrombotic, fibrinolytic and proliferative activities of pulmonary vascular bed in secondary pulmonary hypertension
    (2005) Ergün, Kumral; Balbay, Yücel; Cihan, Gökhan; Aras, Dursun; Çaǧli, Kerim; Ayaz, Selin; Bilgiç, Filiz; Balbay, Öner A.; Şaşmaz, Hatice; Korkmaz, Şule
    Objective: To determine whether pulmonary vascular bed contributes to the development of in situ thrombosis and vascular remodelling in secondary pulmonary hypertension (SPH) via changes in its local secretory activities. Methods: Seventy-one patients with the diagnosis of secondary pulmonary hypertension (38 females, mean age 40.36± 1.05 years) were included in the study. Selective right and left heart catheterization was performed to each patient for diagnostic purposes. Blood samples obtained from left ventricle (LV) and pulmonary artery (PA) of each patient were analyzed for levels of plasminogen activator inhibitor-1 (PAI-1), platelet derived growth factor (PDGF), vascular endothelial growth factor (VEGF), D-dimer, von Willebrand factor (vWF), protein-C, antithrombin-III, fibrinogen, and plasminogen. Results were compared between LV and PA. Correlation analysis between each parameter and mean pulmonary artery pressure (MPAP) was performed. Results: Although mean level of VEGF in LV and PA were found to be in normal range, it was significantly higher in LV than in PA (p<0.001). Mean PDGF and D-dimer levels, which remained in normal range were also higher in LV (p<0.001 and p<0.001, respectively) than in PA;.vWF showed similar degree of elevation in both LV and PA. Only one parameter, PAI-1, was found to be significantly higher in PA than in LV (p=0.012). Antithrombin-III, protein C, plasminogen, and fibrinogen levels showed no significant differences between two chambers. They also remained in normal range, except for fibrinogen, which was slightly elevated in both LV and PA. Correlation analysis revealed strong positive correlation between D-dimer level in both LV and PA and MPAP (r=0.775, p<0.001 and r=0.649, p<0.001, respectively). Conclusion: In SPH, pulmonary vascular bed shows increased thrombotic, hypofibrinolytic, and proliferative activities, which are partially related to the severity of illness.