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Biomedical subjects

R Strauss

Publications and source records attributed to R Strauss.

At least 19 recordsLinked to original sources

Plasmapheresis therapy in an elderly patient with rapidly progressive Henoch-Schönlein purpura with disseminated organ involvement.

Henoch-Schönlein purpura (HSP) frequently occurs in children below the age of 15 years and is rare with increasing age. Prognosis and therapy largely depend on the clinical presentation. The disease may be preceded by an upper respiratory tract infection, and drugs have also been implicated in the pathogenesis of the disease. Most children recover from the illness, whereas 40% of adults have persistent hematuria and 10% develop chronic renal failure. Recent studies strongly suggest that adults with HSP should be monitored for prolonged periods and treated aggressively. Here, we present a case of a patient with HSP who developed multiorgan failure requiring assistance in breathing and dialysis, and also sustained gastrointestinal bleeding despite aggressive immunosuppressive therapy. In analogy to published data in children with severe HSP, the patient was treated by plasma exchange in combination with low dose oral cyclophosphamide, while high dose steroids were reduced over time. The patient could be discharged 70 days after admission. One year after discharge, the patient is doing well without any signs of activity of HSP and completely unremarkable renal function. The maintenance daily dose of steroids is 7.5 mg.

Cyclophosphamide↗

Evaluation of adenovirus vectors containing serotype 35 fibers for tumor targeting.

There is growing evidence from in vitro studies that subgroup B adenoviruses (Ad) can overcome the limitations in safety and tumor transduction efficiency seen with commonly used subgroup C serotype 5-based vectors. In this study, we confirm that the expression level of the B-group Ad receptor, CD46, correlates with the grade of malignancy of cervical cancer in situ. We also demonstrate the in vivo properties of Ad5-based vectors that contain the B-group Ad serotype 35 fiber (Ad5/35) in transgenic mice that express CD46 in a pattern and at a level similar to humans. Upon intravenous and intraperitoneal injection, an Ad5/35 vector did not efficiently transduce normal tissue, but was able to target metastatic or intraperitoneal tumors that express CD46 at levels comparable to human tumors. When an oncolytic Ad5/35-based vector was employed, in both tumor models antitumor effects were observed. Furthermore, injection of Ad5/35 vectors into CD46 transgenic mice caused less innate toxicity than Ad5 vectors. Our data demonstrate that Ad vectors that target CD46 offer advantages over Ad5-based vectors for treatment of cancer.

Adenoviridae↗

Seroprevalence of anti-Yersinia antibodies in healthy Austrians.

Yersiniosis is caused by Y. enterocolitica and Y. pseudotuberculosis mostly presenting as intestinal infection. The infection is usually acquired from contaminated food. The aim of this study was to determine the seroprevalence of anti-Yersinia antibodies in Austrians. Sera of 750 healthy Austrians from all nine states were tested for anti-Yersinia IgG antibodies using the recomBlot Yersinia Westernblot kit. Overall seroprevalence was 29.7%. Seroprevalence increased significantly with age from 24.7% in the group of the 19 to 24 year olds to 38.5% in the group of persons older than 44 years. The seroprevalence of anti-Yersinia antibodies varied within the states between 18% and 43.5%. The high seroprevalence of anti-Yersinia antibodies in contrast to only approximately 100 reported yersiniosis cases per year points to the fact that the majority of infections is either subclinical or mild.

Adult↗

Treatment effects of high-dose antithrombin without concomitant heparin in patients with severe sepsis with or without disseminated intravascular coagulation.

BACKGROUND: Disseminated intravascular coagulation (DIC) is a serious complication of sepsis that is associated with a high mortality. OBJECTIVES: Using the adapted International Society on Thrombosis and Haemostasis (ISTH) diagnostic scoring algorithm for DIC, we evaluated the treatment effects of high-dose antithrombin (AT) in patients with severe sepsis with or without DIC. PATIENTS AND METHODS: From the phase III clinical trial in severe sepsis (KyberSept), 563 patients were identified (placebo, 277; AT, 286) who did not receive concomitant heparin and had sufficient data for DIC determination. RESULTS: At baseline, 40.7% of patients (229 of 563) had DIC. DIC in the placebo-treated patients was associated with an excess risk of mortality (28-day mortality: 40.0% vs. 22.2%, P < 0.01). AT-treated patients with DIC had an absolute reduction in 28-day mortality of 14.6% compared with placebo (P = 0.02) whereas in patients without DIC no effect on 28-day mortality was seen (0.1% reduction in mortality; P = 1.0). Bleeding complications in AT-treated patients with and without DIC were higher compared with placebo (major bleeding rates: 7.0% vs. 5.2% for patients with DIC, P = 0.6; 9.8% vs. 3.1% for patients without DIC, P = 0.02). CONCLUSIONS: High-dose AT without concomitant heparin in septic patients with DIC may result in a significant mortality reduction. The adapted ISTH DIC score may identify patients with severe sepsis who potentially benefit from high-dose AT treatment.

Aged↗

Social impact of tuberculosis in southern Thailand: views from patients, care providers and the community.

BACKGROUND: There is growing recognition that attention to social and behavioral factors in tuberculosis (TB) control needs to complement biomedical emphasis on better drugs, vaccines and new diagnostic tools. METHODS: Using qualitative methods, we conducted 10 focus groups and seven individual interviews to explore how TB is perceived or experienced in southern Thailand. Participants included male and female patients with TB, patients with AIDS, TB care providers, family members of patients with TB, religious leaders (Buddhist and Muslim), and unaffected community members. RESULTS: Responses informed two conceptual frameworks on stigma and social support. The first model dichotomized the meaning of TB into 'good' and 'bad' factors related to social support and stigma, respectively. The second model identified three themes--disease severity, religion, and knowledge of TB--linked to either stigma, social support, or both. CONCLUSION: Social support as a facilitator and stigma as a barrier are diametrically opposed concepts that need to inform TB care and treatment. Interventions to reduce stigma and promote social support at the patient, household, community, and health care system levels should be part of future efforts in the control of TB in Thailand.

Adolescent↗

A human case of travel-related rabies in Austria, September 2004.

A young male Austrian tourist, aged 23 years and unvaccinated against rabies, was bitten by a dog in Morocco in July 2004. One month later he was hospitalised in Ceuta with symptoms compatible with rabies. He died on 23 September in an Austrian hospital after a diagnosis of rabies was confirmed by FAT, IHC and RT-PCR (including sequencing) of the neck skin and the RT-PCR (including sequencing) of the pharyngeal swab. This Austrian case of laboratory confirmed rabies highlights the urgent need for reinforcement of the international recommendations for travel vaccinations.

Adult↗

Malaria in Austria 1990-2000.

In Austria, between 1990 and 2000, 924 travel related malaria cases were reported (mean = 84/year). No significant decreasing or increasing trends were observed. P. falciparum (n=517; 55.9%) accounted for the highest number of cases followed by P. vivax or ovale (n=321; 34.7%) and P. malariae (n=29; 2.2%). Most infections were contracted in highly endemic malaria regions (n=686; 74.2%) and most cases were reported from the largest counties: Vienna (n=336, 36.4%), Styria (n=156, 16.8%), and Lower Austria (n=151, 16.3%). Overall, 12 deaths occurred, most were caused by P. falciparum (n=9, 75%; case fatality rate: 1.9%). Data on chemoprophylaxis was available for 752 cases (81.4%) but only half of them (n=367, 48.8%) gave detailed information on the drug used. Data on compliance were obtained for only 45.4% of the cases, with only about 60% of patients completing the full course of prophylaxis.

Adolescent↗

Hepatitis C in Austria 1993-2000: reporting bias distort HCV epidemiology in Austria.

From 1993 to 2000 in Austria, the notification system registered 2232 cases of hepatitis C whereas 10 607 hospital cases were reported in the hospital discharge register (HDR). These differences can be explained by under-reporting due to lax reporting behaviour and stigma associated with this disease. The distribution of HCV infection varied geographically. The notification data showed the highest incidence rates in Tyrol, while HDR data showed highest hospitalisation rates in Vienna and Lower Austria. This study highlights the urgent need for a clear case definition at the national level and an electronic reporting system.

Austria↗

Tuberculosis in Austria 1995-99: geographical distribution and trends.

A descriptive analysis of routine surveillance data on tuberculosis (TB) from 1995 to 1999 was performed in Austria. The federal states of Vienna and Upper Austria showed the highest yearly incidences for all five years. In general, however, a decrease of the yearly incidence was observed for all federal states except for Carinthia (where there was a small increase of 3.2 %). In the cities of Vienna, Linz, Wels, Salzburg, Klagenfurt and St-Pölten, as well as in the regions of Eastern Tyrol, Southern Carinthia, and Southern Burgenland, the incidence was above average (>19 cases/100,000 for each). The number of cases per year and per district reported by the statutory reporting system were clearly in excess of those reported by hospitals. The comparison of the two datasets, however, showed a highly significant regional correlation of age standardised morbidity rates at district level. The findings are prone to reporting bias and might not reflect the real TB situation. The responsible health authorities should therefore consider the results as a 'working hypothesis in order to review the reporting behaviour at district level.

Age Distribution↗

Herbal ephedra/caffeine for weight loss: a 6-month randomized safety and efficacy trial.

OBJECTIVE: To examine long-term safety and efficacy for weight loss of an herbal Ma Huang and Kola nut supplement (90/192 mg/day ephedrine alkaloids/caffeine). DESIGN: Six-month randomized, double-blind placebo controlled trial. SUBJECTS: A total of 167 subjects (body mass index (BMI) 31.8+/-4.1 kg/m(2)) randomized to placebo (n=84) or herbal treatment (n=83) at two outpatient weight control research units. MEASUREMENTS: Primary outcome measurements were changes in blood pressure, heart function and body weight. Secondary variables included body composition and metabolic changes. RESULTS: By last observation carried forward analysis, herbal vs placebo treatment decreased body weight (-5.3+/-5.0 vs. -2.6+/-3.2 kg, P<0.001), body fat (-4.3+/-3.3 vs. -2.7+/-2.8 kg, P=0.020) and LDL-cholesterol (-8+/-20 vs. 0+/-17 mg/dl, P=0.013), and increased HDL-cholesterol (+2.7+/-5.7 vs. -0.3+/-6.7 mg/dl, P=0.004). Herbal treatment produced small changes in blood pressure variables (+3 to -5 mm Hg, P< or =0.05), and increased heart rate (4+/-9 vs. -3+/-9 bpm, P<0.001), but cardiac arrhythmias were not increased (P>0.05). By self-report, dry mouth (P<0.01), heartburn (P<0.05), and insomnia (P<0.01) were increased and diarrhea decreased (P<0.05). Irritability, nausea, chest pain and palpitations did not differ, nor did numbers of subjects who withdrew. CONCLUSIONS: In this 6-month placebo-controlled trial, herbal ephedra/caffeine (90/192 mg/day) promoted body weight and body fat reduction and improved blood lipids without significant adverse events.

Blood Glucose↗

Pseudomembranous tracheobronchitis due to Bacillus cereus.

We present a case of a rapidly progressive pseudomembranous tracheobronchitis and pneumonia in a 52-year-old woman with severe aplastic anemia. Bacillus cereus was isolated from bronchoalveolar lavage fluids, blood cultures, and pseudomembrane biopsy specimens; despite intensive antibiotic treatment, the patient's condition deteriorated rapidly. To our knowledge, this is the first report of a B. cereus infection that has caused pseudomembranous tracheobronchitis, possibly because of the production of bacterial toxins.

Anti-Bacterial Agents↗

Drosophila Pax-6/eyeless is essential for normal adult brain structure and function.

A role for the Pax-6 homologue eyeless in adult Drosophila brain development and function is described. eyeless expression is detected in neurons, but not glial cells, of the mushroom bodies, the medullar cortex, the lateral horn, and the pars intercerebralis. Furthermore, severe defects in adult brain structures essential for vision, olfaction, and for the coordination of locomotion are provoked by two newly isolated mutations of Pax-6/eyeless that result in truncated proteins. Consistent with the morphological lesions, we observe defective walking behavior for these eyeless mutants. The implications of these data for understanding postembryonic brain development and function in Drosophila are discussed.

Age Factors↗

Changes in quality of life after medical intensive care.

OBJECTIVES: To determine outcome and changes in health-related quality of life (QOL) in medical intensive care patients. DESIGN AND SETTING: Prospective comparison of QOL before and 6 months after intensive care unit (ICU) admission in a 12-bed noncoronary medical ICU of a university hospital. PATIENTS: All 325 consecutively admitted adult patients who spent at least 24 h on the ICU were eligible. MEASUREMENTS AND RESULTS: QOL measurements were collected before and 6 months after ICU admission. Comorbidity classified by the Charlson index was 2.44 +/- 1.96. Mean stay in the ICU was 10.4 +/- 15.1 days, mean Acute Physiology and Chronic Health Evaluation II score was 23 +/- 10. Cumulative mortality was: ICU 24 %, hospital 34 %, 6 months 43 %. Relative to baseline, follow-up interviews of 185 survivors revealed no significant changes in the overall QOL score (p = 0.93). The subscales basic physiological activities (p = 0.07) and normal daily activities (p = 0.15) showed a nonsignificant deterioration. A significant improvement was noted for the domain emotional state (p = 0.013). CONCLUSIONS: Six months after admission to a medical ICU most survivors had regained their preadmission health-related QOL. Multivariate analysis showed that preadmission QOL, age, and severity of illness were most strongly associated with follow-up QOL. Of the survivors 86 % were living at home, and all but one of those previously in employment had returned to their former work. Most patients (94%) would undergo ICU treatment again if necessary.

Adolescent↗

Task-specific association of photoreceptor systems and steering parameters in Drosophila.

Visual motion processing enables moving fruit flies to stabilize their course and altitude and to approach selected objects. Earlier attempts to identify task-specific pathways between two photoreceptor systems (peripheral retinula cells 1-6, and central retinula cells 7 + 8) and three steering parameters (wingstroke asymmetry, abdomen deflection, hindleg deflection) attributed course control and object fixation to peripheral retinula cells 1-6-mediated simultaneous reactions of these parameters. The present investigation includes first results from fixed flying or freely walking ninaE17 mutants which cannot synthesize the peripheral retinula cells 1-6 photoreceptor-specific opsin. Retention of about 12% of the normal course control and about 58% of the object fixation in these flies suggests partial input sharing for both responses and, possibly, a specialization for large-field (peripheral retinula cells 1-6) and small-field (central retinula cells 7 + 8) motion. Such signals must be combined to perceive relative motion between an object and its background. The combining links found in larger species might explain a previously neglected interdependence of course control and object fixation in Drosophila. -Output decomposition revealed an unexpected orchestration of steering. Wingstroke asymmetry and abdomen deflection do not contribute in fixed proportions to the yaw torque of the flight system. Different steering modes seem to be selected according to their actual efficiency under closed-loop conditions and to the degree of intended turning. An easy experimental access to abdominal steering is introduced.

Animals↗

Short-term prognosis in critically ill patients with cirrhosis assessed by prognostic scoring systems.

The short-term prognosis of acutely ill patients with cirrhosis is influenced by the degree of hepatic insufficiency and by dysfunction of extrahepatic organ systems. The purpose of this study was to assess and compare the prognostic accuracy of the Child-Pugh classification, the Acute Physiology and Chronic Health Evaluation (APACHE) II system and the Sequential Organ Failure Assessment (SOFA) for predicting hospital mortality in patients with cirrhosis when used 24 hours after admission to a medical intensive care unit (ICU). Prospective data were recorded on 143 patients. Cumulative mortality rates were 36% in the ICU, 46% in the hospital, and 56% at 6-month follow-up. By using the area under receiver operating characteristic (AUROC) curves, the SOFA showed an excellent discriminative power (AUROC 0.94), which was clearly superior to the APACHE II (AUROC 0.79) and the Child-Pugh system (AUROC 0.74). Hospital mortality rates below and above a cutoff of 8 SOFA points were 4% and 88%, respectively (P <.0005). The SOFA score also reflected resource use during the ICU treatment as measured by daily workload and length of stay. The SOFA is an easily applied tool with excellent prognostic abilities and can be used to enhance clinical judgment of prognosis as well as providing patients and families with objective information.

Adult↗

Highwire regulates synaptic growth in Drosophila.

The formation, stabilization, and growth of synaptic connections are dynamic and highly regulated processes. The glutamatergic neuromuscular junction (NMJ) in Drosophila grows new boutons and branches throughout larval development. A primary walking behavior screen followed by a secondary anatomical screen led to the identification of the highwire (hiw) gene. In hiw mutants, the specificity of motor axon pathfinding and synapse formation appears normal. However, NMJ synapses grow exuberantly and are greatly expanded in both the number of boutons and the extent and length of branches. These synapses appear normal ultrastructurally but have reduced quantal content physiologically. hiw encodes a large protein found at presynaptic terminals. Within presynaptic terminals, HIW is localized to the periactive zone surrounding active zones; Fasciclin II (Fas II), which also controls synaptic growth, is found at the same location.

Animals↗

Changing prevalence of oral manifestations of human immuno-deficiency virus in the era of protease inhibitor therapy.

OBJECTIVE: The purpose of this study was to determine temporal trends in the prevalence of oral manifestations of human immunodeficiency virus (HIV). STUDY DESIGN: Five hundred seventy HIV-infected adults recruited consecutively were examined by using established presumptive clinical criteria for HIV-associated oral lesions. Prevalence of oral lesions before the widespread use of HIV protease inhibitors (February 1995 through August 1996, 8% of the early sample, n = 271) was compared with lesion prevalence in a more recent period of greater protease inhibitor use (December 1996 through February 1999, 42% of the late sample, n = 299). RESULTS: Overall prevalence of oral lesions significantly decreased from early to late periods, 47.6% to 37.5%, respectively (P =.01), with some variation by lesion type. Prevalence of hairy leukoplakia (25. 8% to 11.4%; P <.01) and necrotizing periodontal diseases (4.8% to 1. 7%; P =.03) decreased, whereas HIV salivary gland disease increased (1.8% to 5.0%; P =.04). Changes in prevalence of oral candidiasis (20.3% to 16.7%), aphthous ulcers (3.7% to 3.0%), oral warts (2.2% to 4.0%), herpes simplex virus lesions (1.8% to 2.0%), and Kaposi's sarcoma (1.1% to 0.3%) were not statistically significant (P >.20 for all comparisons). CONCLUSION: The pattern of oral opportunistic infections is changing in the era of protease inhibitor use.

AIDS-Related Opportunistic Infections↗