Antituberculosis drug resistance patterns in two regions of Turkey: a retrospective analysis

BACKROUND: The emergence of Mycobacterium tuberculosis strains resistant to antituberculosis agents has recently received increased attention owing largely to the dramatic outbreaks of multi drug resistance tuberculosis (MDR-TB). METHODS: Patients residing in Zonguldak and Kayseri provinces of Turkey with, pulmonary tuberculosis diagnosed between 1972 and 1999 were retrospectively identified. Drug susceptibility tests had been performed for isoniazid (INH), rifampin (RIF), streptomycin (SM), ethambutol (EMB) and thiacetasone (TH) after isolation by using the resistance proportion method. RESULTS: Total 3718 patients were retrospectively studied. In 1972–1981, resistance rates for to SM and INH were found to be 14.8% and 9.8% respectively (n: 2172). In 1982–1991 period, resistance rates for INH, SM, RIF, EMB and TH were 14.2%, 14.4%, 10.5%, 2.7% and 2.9% (n: 683), while in 1992–1999 period 14.4%, 21.1%, 10.6%, 2.4% and 3.7% respectively (n: 863). Resistance rates were highest for SM and INH in three periods. MDR-TB patients constituted 7.3% and 6.6% of 1982–1991 and 1992–1999 periods (p > 0.05). CONCLUSION: This study demonstrates the importance of resistance rates for TB. Continued surveillance and immediate therapeutic decisions should be undertaken in order to prevent the dissemination of such resistant strains

BNT162b2 COVID-19 vaccination elicited protective robust immune responses in pediatric patients with inborn errors of metabolism

IntroductionSARS-CoV-2 infection can lead to a life-threatening acute metabolic decompensation in children with inborn errors of metabolism (IEM), so vaccination is mandatory. However, IEMs can also impair innate or adaptive immunity, and the impact of these immune system alterations on immunogenicity and vaccine efficacy is still unknown. Here, we investigated humoral immune responses to the BNT162b2 mRNA COVID-19 vaccine and clinical outcomes in pediatric IEM patients.MethodsFifteen patients between 12-18 years of age with a confirmed diagnosis of IEM, and received BNT162b2 were enrolled to the study. Patients with an anti-SARS-CoV-2 IgG concentration >50 AU/mL before vaccination were defined as “COVID-19 recovered” whereas patients with undetectable anti-SARS-CoV-2 IgG concentration were defined as “COVID-19 naïve”. Anti-SARS-CoV-2 Immunoglobulin G (IgG) and SARS-CoV-2 neutralizing antibody (nAb) titers were measured to assess humoral immune response.ResultsAnti-SARS-CoV-2 IgG titers and nAb IH% increased significantly after the first dose. The increase in antibody titers after first and second vaccination remained significant in COVID-19 naïve patients. Complete anti-SARS-CoV-2 IgG seropositivity and nAb IH% positivity was observed in all patients after the second dose. Vaccination appears to be clinically effective in IEM patients, as none of the patients had COVID-19 infection within six months of the last vaccination.DiscussionHumoral immune response after two doses of BNT162b2 in pediatric IEM patients was adequate and the immune response was not different from that of healthy individuals

Changes in the size of adrenal glands in acute pulmonary tuberculosis with therapy

Adrenal glands may be involved during both acute and chronic tuberculosis. They are enlarged in acute pulmonary tuberculosis. We aimed to investigate the changes in adrenal size in acute pulmonary tuberculosis before and after therapy in a prospective study. Eleven hospitalized patients with newly diagnosed sputum positive pulmonary tuberculosis were studied. Basal cortisol levels were measured in the patients before and after the therapy. Cortisol levels were also measured 30 and 60 min after Synacthen (250 mu g i.v.) injection in the patients before the therapy. The size of the adrenal glands was measured by computerized tomography. The maximum width perpendicular to the long axis of the body of the gland, maximum width of the medial and lateral limbs and the length of the adrenals were measured. All measurements were done before and after the eight-month anti-tuberculosis therapy. All 11 patients had an intact adrenal cortisol reserve. Both the width and length of the right and left adrenal glands were significantly greater before the therapy than after the therapy. We conclude that adrenal enlargement demonstrated by computerized tomography in acute pulmonary tuberculosis is reduced after appropriate therapy

A New Prognostic-Predictor Marker Of Cardiovascular Disease For Obstructive Sleep Apnea: Pentraxin 3

Obstructive sleep apnea syndrome (OSAS) is characterized by intermittent complete or partial upper airway obstruction during sleep causing hypoxia, sleep disruption, daytime sleepiness, mental and physical effects is the second most common respiratory condition; affecting 0.3- 4% of the middle- aged population (1). OSAS is strongly associated with cardiovascular morbidity and mortality, including an increased risk of endothelial dysfunction and atherosclerosis (2). The increased prevalence of hypertension and atherogenesis among OSAS patients has been attributed to sympathetic activation and endothelial dysfunction, likely resulting from initiation and propagation of inflammatory responses within the microvasculature (3). There is increasing evidence that OSAS associated with inflammatory cytokines and markers such as C-reactive protein (CRP), interleukin-6, fibrinogen, tumor necrosis factor alpha which are closely-involved in atherosclerosis, plaque formation and rupture (4). OSAS, a potent activator of inflammation, inreases CRP which has been used as an inflammatory biomarker for prediction of cardiovascular events;CRP is named as classical short pentraxins and is a acute phase protein produced from the liver in response to inflammatory mediators (5). Pentraxin 3 (PTX3), a new defined member of the pentraxin family, is produced from the major cell types involved in atherosclerotic lesions, including vascular endothelial-smooth muscle cells, macrophages, and neutrophils in response to inflammatory stimuli, however CRP is produced only from liver (6,7). Furthermore, CRP represents a systemic response to local inflammation, whereas PTX3 is rapidly produced directly from damaged tissues and directly reflects only the inflammatory state of the vasculature. The last but not the least PTX3 levels have been reported to be significantly elevated in acute myocardial infarction (7). In the light of these knowledge, PTX3 is able to reflect ACS condition better than CRP, it is highly possible that PTX3 is a superior biomarker to predict future cardiovascular events. Therefore, we speculate that OSAS, directly or indirectly, induces a persisting systemic and vascular inflammation and may cause PTX3 secretion. Since high PTX3 level is a sign of vascular inflammation which is the trigger point for many diseases that may occur secondary to OSAS, might also be a good marker of cardiovascular disease in OSAS. Screening of PTX3 level in OSAS patients may be a useful marker for evaluating the prognosis of OSAS. To address this hypothesis, further prospective studies are warranted to evaluate the role of PTX3 in patients with OSAS

Impaired lung epithelial permeability in hepatitis C virus antibody positive patients detected by 99mTc-DTPA aerosol scintigraphy

Chronic hepatitis C virus (HCV) infection has been recently identified as an aetiological agent in idiopathic pulmonary fibrosis. The present study was designed to determine the pulmonary clearance rate of 99mTc-diethylenetriaminepentaacetic acid (99mTc-DTPA) in asymptomatic HCV antibody positive (HCV Ab+) patients and the role of 99mTc-DTPA aerosol scintigraphy in the early detection of lung involvement. Twenty-six non-smoker HCV Ab+ and HCV-RNA (+) patients (20 female, six male; aged 43±11 years), with no clinical pulmonary symptoms, and normal radiological findings, were studied. Thirty-one healthy non-smoker volunteers (24 female, seven male; aged 40±10 years) were taken as a control group. 99mTc-DTPA aerosol inhalation scintigraphy and pulmonary function tests were performed in all patients and in controls. On the basis of the scintigrams the percentage decline in activity per minute (Kep) was evaluated, which represented an accurate parameter of lung membrane permeability. The mean Kep values of healthy controls (0.78±0.13 for left lung, 0.79±0.14 for right lung) were significantly lower than HCV Ab+ patients (1.10±0.31 for left lung, 1.11±0.34 for right lung, P0.05). We conclude that subclinical alveolitis and/or interstitial lung disease may be present in patients with HCV Ab+, since it is known that an increase in the epithelial permeability of the lung is an early manifestation of interstitial disease. © 2002 Lippincott Williams & Wilkins, Inc

Evaluation of Malignant Mesothelioma in Central Anatolia: A Study of 67 Cases

BACKROUND: Malignant mesothelioma (MM) is a fatal neoplasm which frequently results from exposure to asbestos or erionite

Leptin Levels in Various Manifestations of Pulmonary Tuberculosis

Background. Proinflammatory cytokines are prime candidates as causative agents of the metabolic changes that eventually result in tuberculosis-associated weight loss. Microbial products and cytokines such as TNF and IL-1 increase leptin expression dose dependently in adipose tissue. Leptin plays an important role in cellular immunity. Objectives. In this study, we investigated serum leptin and TNF-α levels before and after antituberculosis therapy in patients with active pulmonary tuberculosis (TB). Methods. Twenty five in patients with active pulmonary TB and 18 healthy controls participated in the study. Leptin and TNF-α levels were measured before treatment and six months after the treatment and they were compared with the control group. Body mass index (BMI) and chest X-rays before and after the treatment were also evaluated. Results. The leptin levels before and after the treatment were 1.66±1.68 ng/mL and 3.26±3.81 ng/mL, respectively. The leptin levels of tuberculous patients were significant than in healthy patients (P<.05). The BMI was 19.36±2.55 kg/m2 before the treatment and 22.87±3.13 kg/m2 after the treatment. The TNF-α level was 23.19±12.78 pg/mL before the treatment and 15.95±6.58 pg/mL after the treatment. There was no correlation between leptin and TNF-α levels. Leptin levels were low in patients who had sequela lesion on chest radiographs. Conclusion. Leptin levels are suppressed in tuberculous patients and low leptin levels may contribute to increased susceptibility to infection and recovery with sequela lesions