Bacterial Genotyping of Central Nervous System Tuberculosis in South Africa: Heterogenic Mycobacterium tuberculosis Infection and Predominance of Lineage 4.

Tuberculous meningitis (TBM), the most severe extrapulmonary manifestation of tuberculosis, is caused by the pathogen Mycobacterium tuberculosis The M. tuberculosis complex includes seven lineages, all described to harbor a unique geographical dissemination pattern and clinical presentation. In this study, we set out to determine whether a certain M. tuberculosis lineage demonstrated tropism to cause TBM in patients from Cape Town, South Africa. DNA was extracted from formalin-fixed paraffin-embedded central nervous system (CNS) tissue from a unique neuropathological cohort of 83 TBM patients, collected between 1975 and 2012. M. tuberculosis lineages 1, 2, 3, and 4 were determined using an allele-specific PCR and Sanger sequencing. Of the 83 patient specimens tested, bacterial characterization could be performed on 46 specimens (55%). M. tuberculosis lineage 4 was present in 26 patient specimens (56%), and non-lineage 4 was identified in 10 cases (22%). Moreover, genomic heterogeneity was detected in the CNS specimens of 7 adults and 3 children. We could show that infection of the CNS is not restricted to a single M. tuberculosis lineage and that even young children with rapid progression of disease can harbor more than one M. tuberculosis lineage in the CNS.

In Vitro Cytotoxicity of Zinc Fructoborate, a Novel Zinc-Boron Active Natural Complex.

In recent years, the role of zinc in biological systems has been a subject of intense research. Zinc is required for multiple metabolic processes as a structural, regulatory, or catalytic ion. The objective of this study, was to assess the toxicity profile of a newly synthesized zinc-boron molecule on cultured cells. Zinc fructoborate, at different levels of concentration, was tested for its impact on the Vero kidney cell line (ATCC® CCL-81™) using the MTT assay. The compound exhibited a low cytotoxic effect on the cell line. Thus, our study demonstrates that the zinc fructoborate could become a promising dietary supplement molecule.

Prevalence of Erythrocyte Changes in Patients with Heart Failure.

Heart failure (HF) is one of the most common causes of hospitalization in patients over the age of 65. Purpose The objective of our study was to assess the prevalence of anemia and characterize the morphology of red blood cells in patients admitted for HF decompensation. Material and Methods We have included patients with decompensated HF with left ventricular ejection fraction (LVEF). ≤45% successively hospitalized at Filantropia Clinical Hospital Craiova. Results A total of 397 patients, including 204 males (51.39%) were included. The prevalence of anemia in our group was 38.54% (153 patients). The mean age of patients with heart failure and anemia was significantly higher compared to those with normal hemoglobin (75.05±7.16 years vs. 72.27±7.91 years, p=0.00047). The majority of anemias (68.62%) were normocytic normochromic, defined as mean corpuscular hemoglobin (MCV) value between 80 to 98fl and mean corpuscular hemoglobin concentration (MCH)>27pg. 20 patients (13.07%) had microcytic hypochromic anemia (MCV<80fL and MCH<27pg), in 16 patients (10.45%) was present normocytic hypochromic anemia (MCV 80-98fl and MCH<27pg) and 12 patients (7.48%) had macrocytic anemia (MCV>98fL and MCH>27pg), respectively. Conclusions Our study suggests that the prevalence of anemia in hospitalized patients for HF decompensation is high and normocytic normochromic anemia was the most common morphological type of anemia.

Serotonin Receptors in the Medulla Oblongata of the Human Fetus and Infant: The Analytic Approach of the International Safe Passage Study.

The Safe Passage Study is an international, prospective study of approximately 12 000 pregnancies to determine the effects of prenatal alcohol exposure (PAE) upon stillbirth and the sudden infant death syndrome (SIDS). A key objective of the study is to elucidate adverse effects of PAE upon binding to serotonin (5-HT) 1A receptors in brainstem homeostatic networks postulated to be abnormal in unexplained stillbirth and/or SIDS. We undertook a feasibility assessment of 5-HT1A receptor binding using autoradiography in the medulla oblongata (6 nuclei in 27 cases). 5-HT1A binding was compared to a reference dataset from the San Diego medical examiner's system. There was no adverse effect of postmortem interval ≤100 h. The distribution and quantitated values of 5-HT1A binding in Safe Passage Study cases were essentially identical to those in the reference dataset, and virtually identical between stillbirths and live born fetal cases in grossly non-macerated tissues. The pattern of binding was present at mid-gestation with dramatic changes in binding levels in the medullary 5-HT nuclei over the second half of gestation; there was a plateau at lower levels in the neonatal period and into infancy. This study demonstrates feasibility of 5-HT1A binding analysis in the medulla in the Safe Passage Study.

Upper Gastrointestinal Bleeding in Chronic Kidney Disease Patients.

Aim: To investigate upper GI bleeding as a particular complication in chronic kidney disease patients. Material and methhod: 30 chronic kidney disease patients admitted to the Nephrology Department for upper gastrointestinal bleeding over a period of 5 years. Results: 16 patients were undergoing hemodialysis (53.3%) and 14 patients were not in a hemodialysis program. There were no patients undergoing peritoneal dialysis. Very high comorbidity rate for all patients, most important being cardiovascular diseases. Only 10% of patients had oral anticoagulant treatment prior to GI bleeding. Conservative treatment was successful for all patients; no endoscopic or surgical haemostasis was needed. Conclusion: Although chronic disease kidney patients have a high risk of upper GI bleeding compared to the general population, the conservative treatment applied has a very high rate of success in stopping the bleeding without the need for endoscopic or surgical haemostasis treatment.

Pathological evidence in support of total mesorectal excision in the management of rectal cancer.

BACKGROUND: Pelvic recurrence following conventional rectal resection for cancer is common. Preoperative iradiation has been shown in prospective randomized studies to halve this risk. AIM: This multiinstitutional study aimed to assess the necesity of total mesorectal excision in rectal cancer. PATIENTS AND METHOD: Pathological resections from 50 consecutive patients with adenocarcinoma of the rectum within 12 cm of the anal verge who underwent currative resection incorporating total mesorectal excision were examined. The resection specimen was examined by one of two pathologists. Some 50 total mesorectal excision specimens were examined following rectal excision for cancer. Some 38 had total mesorectal excision as a component of a low anterior resection and 12 with abdomino-perineal resection. "Cure" was defined as absence of metastatic disease and the excision of entire macroscopic tumor tissue with negative proximal and distal borders. TME was performed as described by Heald et al. The mesorectum was evaluated for lymph nodes and tumor deposists in three areas: deep to the tumor, in the proximal mesorectum and in the distal mesorectum. RESULTS: Six patients had Dukes A lesions. Of 21 patients with Dukes B tumors, five had discrete foci of adenocarcinoma in the mesorectum, with no evidence of lymph node metastasis. Dukes C lesions were more heterogeneous, but 12 out of 23 patients had distinct mesorectal deposists in addition to mesorectal node involvement. Circumferential margin involvement was rare, but mesorectal tumor deposits were present in 17 of 44 patients with pT3 tumors, and 23 of 44 had mesorectal nodal involvement. No patient with a pT2 tumor had mesorectal involvement. Failure to excise the mesorectum completely has the potential to leave gross or microscopic residual disease that may in theory predispose to local failure. CONCLUSION: Total mesorectal excision is necessary to avoid incomplete pathological evaluation of the mesorectum and understaging of rectal cancer.