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1.
Chirurg ; 90(10): 806-815, 2019 Oct.
Article in German | MEDLINE | ID: mdl-31501936

ABSTRACT

The treatment of complex injuries of the lower extremities in geriatric and/or multimorbid patients requires optimized preoperative and perioperative management as well as differentiated and interdisciplinary surgical approaches. Timely and definitive treatment should be strived for to avoid longer periods of immobilization. Temporary external stabilization of complex fractures, when necessary, should be followed by permanent loading stable internal osteosynthesis as soon as possible. Accompanying soft tissue defects are reconstructed after wound débridement using the full armamentarium of plastic and reconstructive surgical procedures, including microvascular free flap. In the context of perfusion compromised soft tissue situations, negative pressure wound therapy can provide sterile temporary defect coverage and aid in preconditioning poorly vascularized tissue before definitive reconstruction. A clarification of the vascular status in geriatric patients is paramount and relevant perfusion disorders should be treated either by intervention or open surgery before complex reconstructive interventions. Close interdisciplinary coordination of the various surgical procedures is imperative in order to guarantee an optimized stable reconstructive outcome with acceptable patient risk. Taking these principles into account, the reconstruction of complex trauma to the extremities can be carried out even in geriatric or multimorbid patients in specialized interdisciplinary surgical centers with excellent functional results.


Subject(s)
Leg Injuries/surgery , Lower Extremity/injuries , Lower Extremity/surgery , Plastic Surgery Procedures , Surgery, Plastic , Aged , Debridement , Humans , Postoperative Complications , Retrospective Studies
2.
Chirurg ; 90(10): 795-805, 2019 Oct.
Article in German | MEDLINE | ID: mdl-31463658

ABSTRACT

Complex injuries of the lower extremities in geriatric patients with multiple pre-existing comorbidities represent an increasing challenge to an interdisciplinary team of surgeons. Functional reconstruction of the extremity through osteosynthesis, revascularization and defect coverage aims to preserve mobility and achieve an early return to activities of daily life at home, while avoiding major amputation and the associated risks regarding morbidity and mortality. An interdisciplinary assessment of geriatric patients regarding dystrophy of soft tissue and skín, cardiovascular and metabolic comorbidities as well as specific geriatric diagnostics are crucial steps in ensuring favorable outcomes. Perioperatively, all improvable risk factors should be actively optimized and a specialized interdisciplinary approach to treatment planning (extremity board) is absolutely necessary for success of treatment. It outlines the special features of the geriatric assessment, diagnostics, perioperative management and treatment targets.


Subject(s)
Geriatric Assessment , Lower Extremity/injuries , Lower Extremity/surgery , Vascular Surgical Procedures , Aged , Aging , Amputation, Surgical , Fracture Fixation, Internal , Humans
3.
Nervenarzt ; 89(3): 241-251, 2018 Mar.
Article in German | MEDLINE | ID: mdl-29383414

ABSTRACT

BACKGROUND: Depressive disorders are associated with a high burden of suffering and significantly reduce the well-being and the self-esteem of affected patients. Psychotherapy is one of the main treatment options for depressive disorders. OBJECTIVE: The aim of this article is to present the current evidence for antidepressive psychotherapeutic treatments. MATERIAL AND METHODS: During the revision of the German S3- and National Disease Management Guideline (NDMG) on unipolar depression in 2015, a comprehensive and systematic evidence search was conducted. The results of this search along with a systematic update are summarized. RESULTS: The most intensively investigated psychotherapeutic method is cognitive behavioral therapy (CBT), which proved to be effective in many trials. Evidence also exists for psychodynamic psychotherapy and interpersonal therapy (IPT), followed by systemic therapy and client-centered psychotherapy; however, the evidence is less robust. CONCLUSION: Psychotherapy alone or in combination with pharmacotherapy was shown to be an effective treatment option. Psychotherapy represents a key element in the treatment of depressive disorders.


Subject(s)
Depressive Disorder/therapy , Evidence-Based Medicine , Psychotherapy/methods , Antidepressive Agents/therapeutic use , Cognitive Behavioral Therapy/methods , Combined Modality Therapy , Depressive Disorder/diagnosis , Depressive Disorder/psychology , Diagnosis, Differential , Follow-Up Studies , Humans , Interpersonal Relations , Psychotherapy, Psychodynamic/methods , Quality of Life/psychology , Self Concept , Social Adjustment
4.
Nervenarzt ; 89(3): 252-262, 2018 Mar.
Article in German | MEDLINE | ID: mdl-29404648

ABSTRACT

BACKGROUND: Psychotherapy has been shown to be an effective treatment option for depressive disorders; however, its effectiveness varies depending on patient and therapist characteristics and the individual form of the depressive disorder. OBJECTIVES: The aim of this article is to present the current evidence for psychotherapeutic antidepressive treatments for patients with chronic and treatment-resistant depression as well as for patients with mental and somatic comorbidities. MATERIAL AND METHODS: During the revision of the currently valid German S3- and National Disease Management Guideline (NDMG) on unipolar depression published in 2015, a comprehensive and systematic evidence search including psychotherapy for specific patient groups was conducted. The results of this search along with a systematic update are summarized. RESULTS: Psychotherapy has been shown to be effective in reducing depressive symptoms in patients suffering from chronic and treatment-resistant depression and in patients with mental and somatic comorbidities. The evidence is insufficient particularly for patients with mental comorbidities. CONCLUSION: Based on the current evidence and clinical expertise the NDMG recommends psychotherapy alone or in combination with pharmacotherapy to treat most of these depressive patient groups. Evidence gaps were identified, which highlight the need for further research.


Subject(s)
Depressive Disorder/therapy , Evidence-Based Medicine , Psychotherapy/methods , Chronic Disease , Comorbidity , Depressive Disorder/diagnosis , Depressive Disorder/psychology , Depressive Disorder, Treatment-Resistant/diagnosis , Depressive Disorder, Treatment-Resistant/psychology , Depressive Disorder, Treatment-Resistant/therapy , Guideline Adherence , Humans , Mental Disorders/diagnosis , Mental Disorders/psychology , Mental Disorders/therapy , Outcome and Process Assessment, Health Care
5.
Nervenarzt ; 87(9): 926-36, 2016 Sep.
Article in German | MEDLINE | ID: mdl-27456195

ABSTRACT

The peripartum period represents a critical phase for the onset and course of mental disorders. During this phase, mental disorders occur as first onset or, more often, as recurrent or ongoing chronic conditions with onset and further course of illness in- or outside the peripartal period. No clear risk increase exists for the more prevalent mental disorders such as depressive and anxiety disorders during this period, whereas there is an increased risk for bipolar disorder. Peripartal mental disorders may impact fetal and child development through different mechanisms. The International Statistical Classification of Diseases and Related Health Problems (ICD-10) does not sufficiently take into account particularities of peripartal disorders with possible prognostic relevance. The present article gives an overview on prevalence, course, and clinical diagnostics and presents a proposal for consistent categorization of peripartal mental disorders.


Subject(s)
Mental Disorders/diagnosis , Mental Disorders/epidemiology , Postpartum Period , Pregnancy Complications/diagnosis , Pregnancy Complications/epidemiology , Female , Germany/epidemiology , Humans , Mental Disorders/psychology , Postnatal Care/statistics & numerical data , Pregnancy , Pregnancy Complications/psychology , Prevalence , Risk Factors
6.
Nervenarzt ; 83(6): 731-40, 2012 Jun.
Article in German | MEDLINE | ID: mdl-22065064

ABSTRACT

BACKGROUND: Decompressive hemicraniectomy reduces mortality in patients with space-occupying MCA infarction. Quality of life in surviving patients is discussed controversially. We assessed attitudes of neurologists and nurses providing care to this patient group towards decompressive hemicraniectomy. METHODS: A postal questionnaire on attitudes and opinions on prognosis and quality of life after decompressive hemicraniectomy was returned by 280 neurologists and 166 nurses from tertiary care centers throughout Germany. RESULTS: In both groups of professionals, estimates of the probability of survival after decompressive hemicraniectomy and the resulting degree of disability were consistent with results of clinical outcomes studies. Only 9% of the nurses and 33% of the physicians assumed that the majority of survivors achieve an acceptable quality of life; 58% of physicians and 32% of nurses would suggest decompressive hemicraniectomy to their nearest relative. Under the assumption of an uncertain outcome, 61% of physicians and 22% of nurses would agree to decompressive hemicraniectomy. In both professional groups, agreement for surgery increases when scenarios with a more favorable outcome were proposed [modified Rankin Scale (mRS) 2-5)]. If an outcome of 4 on the mRS is proposed, indicating moderately severe disability, only a minority favored decompressive hemicraniectomy (25% of doctors and 8% of nurses). CONCLUSIONS: Despite a realistic assessment of prognosis after decompressive hemicraniectomy, a majority of respondents estimated the quality of life of survivors as unsatisfactory. Nurses had a more pessimistic attitude towards decompressive hemicraniectomy. The majority of respondents consider an outcome of 4 on the mRS as unacceptable.


Subject(s)
Attitude of Health Personnel , Decompressive Craniectomy/mortality , Infarction, Middle Cerebral Artery/mortality , Infarction, Middle Cerebral Artery/surgery , Nurses/statistics & numerical data , Quality of Life , Adult , Aged , Aged, 80 and over , Female , Germany/epidemiology , Health Surveys , Humans , Male , Middle Aged , Physicians , Prevalence , Prognosis , Risk Factors , Survival Analysis , Survival Rate , Treatment Outcome , Young Adult
7.
Exp Clin Endocrinol Diabetes ; 119(9): 573-5, 2011 Oct.
Article in English | MEDLINE | ID: mdl-21472658

ABSTRACT

INTRODUCTION: While altered cortisol concentrations have been observed in subjects with type 2 diabetes their circadian cortisol profile is unknown. PATIENTS AND METHODS: Using a cross-sectional design, we studied 63 ambulatory individuals with type 2 diabetes and 916 non-diabetic control subjects of the Cooperative Research in the Region of Augsburg (KORA)-F3 study. Circadian cortisol profiles were derived from saliva cortisol concentrations, determined on a regular weekday upon wake-up (F0), as well as ½ h (F½), 8 (F8) and 14 h (F14) after wake-up. RESULTS: Diabetic subjects exhibited a flattened circadian cortisol profile (rm-ANOVA: F[3,654]=3.41, p=0.02), with lower morning and higher afternoon and evening cortisol concentrations. CONCLUSION: We observed a flattened circadian cortisol rhythm in subjects with type 2 diabetes, providing evidence for a specific HPA system dysfunction.


Subject(s)
Circadian Rhythm , Diabetes Mellitus, Type 2/metabolism , Hydrocortisone/metabolism , Saliva/metabolism , Age Factors , Aged , Cross-Sectional Studies , Diabetes Mellitus, Type 2/physiopathology , Female , Germany , Humans , Hypothalamo-Hypophyseal System/physiopathology , Male , Middle Aged , Pituitary-Adrenal System/physiopathology
8.
Nervenarzt ; 81(9): 1049-68, 2010 Sep.
Article in German | MEDLINE | ID: mdl-20802992

ABSTRACT

Unipolar depressive disorders are among the most frequent reasons for utilizing the health care system. Although efficacious treatments are available and further advances have recently been made there is still a need for improving diagnostic and therapeutic procedures. Alignment of treatment on evidence-based treatment guidelines establishes an essential mainstay. The new S3 and National Health Care guidelines on unipolar depression, the compilation of which was coordinated by the German Society of Psychiatry, Psychotherapy and Neurology (DGPPN) and which were approved by 29 scientific and professional associations, is the ambitious effort to present state of the art evidence and clinical consensus for the treatment of depression. For pharmacotherapy of depression differentiated recommendations can be given, also separate from and in addition to psychotherapy.


Subject(s)
Depressive Disorder/diagnosis , Depressive Disorder/therapy , Evidence-Based Medicine/standards , Neurology/standards , Practice Guidelines as Topic , Clinical Trials as Topic , Germany , Humans
9.
Orthopade ; 38(7): 638-42, 2009 Jul.
Article in German | MEDLINE | ID: mdl-19533086

ABSTRACT

This case report concerns a 75-year-old patient who suffered haemorrhagic shock and mors in tabula during implantation of a total hip arthroplasty. The cause was established as an injury of the external iliac vein, probably as a result of the predrilling of holes for the anchoring screws and pegs. The surgical method and topographic anatomy of the operating area are presented. Such vascular injuries are a rare but life-threatening complication of this procedure; the literature quotes a frequency of about 0.3%. So far, no fulminate venous bleeding process has been reported. Complications in such operations cannot always be avoided. However, detailed knowledge of the acetabular geometry can provide more safety for the surgeon when carrying out the secondary anchoring of a press-fit implant.


Subject(s)
Arthroplasty, Replacement, Hip/adverse effects , Iliac Vein/injuries , Postoperative Hemorrhage/etiology , Aged , Cementation , Fatal Outcome , Female , Humans
10.
Nervenarzt ; 78(6): 651-6, 2007 Jun.
Article in German | MEDLINE | ID: mdl-16832698

ABSTRACT

BACKGROUND: The Beck Depression Inventory (BDI) underwent revision in 1996 (BDI-II) with the goal of addressing DSM-IV depression criteria. The present study assessed psychometric properties of the German version of the BDI-II. PATIENTS AND METHODS: The BDI-II was translated into German and evaluated in a series of studies with clinical and nonclinical samples. RESULTS: The content validity of the BDI-II has improved by following DSM-IV symptom criteria. Internal consistency was satisfactorily high (alpha>or=0.84), and retest reliability exceeded r>or=0.75 in nonclinical samples. Associations with construct-related scales (depression, dysfunctional cognitive constructs) were high, while those with nonsymptomatic personality assessment (NEO-FFI) were lower. The BDI-II differentiated well between different grades of depression and was sensitive to change. CONCLUSION: The German BDI-II demonstrates good reliability and validity in clinical and nonclinical samples. It may now replace the older version of the BDI for assessing self-rated severity of depression and course of depressed symptoms under treatment.


Subject(s)
Depressive Disorder/diagnosis , Language , Personality Inventory/statistics & numerical data , Adolescent , Adult , Aged , Cross-Cultural Comparison , Depressive Disorder/psychology , Female , Germany , Hospitals, Psychiatric , Humans , Longitudinal Studies , Male , Middle Aged , Psychometrics/statistics & numerical data , Reproducibility of Results , Surveys and Questionnaires , Translating
11.
Nervenarzt ; 78(7): 764, 766-8, 770-2, 2007 Jul.
Article in German | MEDLINE | ID: mdl-17119890

ABSTRACT

Stalking is a widespread phenomenon describing a pattern of intrusive and threatening behaviour that leads to the victim's perception of being harassed and of him or her being rendered fearful. Physical assault and even homicide may occur in the context of stalking. Anglo-Saxon studies have revealed a lifetime prevalence of being a victim of stalking ranging from 4-7% in men and 12-17% in women. Recently, these rates have been confirmed by the first community based study carried out in Germany. As a stalker can have a number of victims during his or her lifetime, the prevalence of stalkers may be less than this, although at present data for this are lacking. Although the phenomenology of stalking appears to be rather homogenous, fairly distinct stalker typologies and perpetrator-victim relationships have to be considered. Requests for psychiatric and forensic assessment of stalkers are increasing. According to the German penal code, psychiatrists must provide expert opinion on criminal responsibility and the placement of stalkers. So far, all typologies of stalkers refer to the Anglo-Saxon cultural background and do not consider the special needs of German forensic psychiatry. In particular, the psychopathological dimension is widely neglected in common typologies. The present paper proposes a multiaxial typology of stalking that considers the psychopathological dimension, the relationship between stalker and victim and motivational aspects. Consequences for the forensic psychiatric assessment according to section 20, 21 StGB are outlined. It should be pointed out that stalking is not a new diagnostic category, but only involves, at a descriptive level, deviation from a normal behavioural pattern. The central components of the forensic psychiatric assessment remain the known diagnostic categories, the effects of which on behaviour can be analysed.


Subject(s)
Forensic Psychiatry/legislation & jurisprudence , Liability, Legal , Obsessive Behavior/classification , Obsessive Behavior/diagnosis , Practice Guidelines as Topic , Sexual Harassment/classification , Sexual Harassment/legislation & jurisprudence , Crime Victims/statistics & numerical data , Dangerous Behavior , Germany , Humans , Obsessive Behavior/epidemiology , Obsessive Behavior/psychology , Prognosis , Sexual Harassment/psychology , Sexual Harassment/statistics & numerical data
12.
Gesundheitswesen ; 67(12): 869-71, 2005 Dec.
Article in German | MEDLINE | ID: mdl-16379050

ABSTRACT

AIMS: To provide an overview on the psychiatric significance of stalking and the implications for the health care system. RESULTS: Stalking is a widespread phenomenon and can result in significant health care problems. CONCLUSION: In the future physicians will have to deal with this problem in a professional manner.


Subject(s)
Crime/statistics & numerical data , Delusions/epidemiology , Delusions/psychology , Obsessive Behavior/epidemiology , Obsessive Behavior/psychology , Sexual Harassment/psychology , Sexual Harassment/statistics & numerical data , Female , Forensic Psychiatry , Germany/epidemiology , Humans , Male , Violence/psychology , Violence/statistics & numerical data
13.
Orthopade ; 30(9): 658-65, 2001 Sep.
Article in German | MEDLINE | ID: mdl-11603199

ABSTRACT

Primary malignant bone tumors can be treated predominantly with limb salvage. After resection of large articular segments adjacent to the dia- or metaphysis of long bones modular endoprosthetic devices are most commonly used for reconstruction. In case non-vascularized corticocancellous bone is transplanted in order to bridge extensive bone defects, the risk of pseudarthrosis and fracture of the donor bone is significantly higher in comparison to a free vascularized transplant. From 1988 until 1999 we treated 20 patients with extensive bone defects after resection of tumors affecting the upper and lower extremity using a vascularized fibular graft. In this retrospective analysis we collected the data focusing on bone integration and functional outcome. The graft union was classified according to the standards of the "International Symposium of Limb Salvage". Evaluation of the functional outcome was quantified using the Enneking-score. The stabilisation of the transplant was obtained exclusively by plate fixation in the upper extremity. In 10 in a total of 12 patients the reconstruction using a vascularized fibula transfer was reinforced with an allograft in the lower extremity. The functional evaluation score reached 73% of normal function at the last follow-up. After 18 months the radiographic evaluation of graft union was "excellent" in 75%, "good" in 11%, "fair" in 6% and "poor" in 9% according to the criteria of the ISOLS. Main complications were graft fracture in of 15% and pseudarthrosis in 14.3%. Reconstruction of extensive bone defects using free vascularized fibula grafts are a demanding operative procedure. The procedure combines a biologic form of reconstruction with a legitimate expectation of good long term outcome and a relatively low rate of complications.


Subject(s)
Bone Neoplasms/surgery , Bone Transplantation/methods , Microsurgery/methods , Adolescent , Adult , Arm/diagnostic imaging , Arm/surgery , Bone Neoplasms/diagnostic imaging , Child , Child, Preschool , Female , Fibula/blood supply , Fibula/transplantation , Follow-Up Studies , Humans , Leg/diagnostic imaging , Leg/surgery , Male , Middle Aged , Postoperative Complications/diagnostic imaging , Radiography , Retrospective Studies
14.
Int J Syst Evol Microbiol ; 51(Pt 3): 1119-1125, 2001 May.
Article in English | MEDLINE | ID: mdl-11411680

ABSTRACT

An anaerobic, acid-tolerant bacterium, CK55T, was isolated from an acidic forest bog. Cells of CK55T stained Gram-negative but did not have an outer membrane. Cells were spore-forming, motile rods with peritrichous flagella, formed chains or aggregates and were linked by connecting filaments that were composed of a core and outer sheath. Cellobiose, glucose, xylose, mannose, mannitol, sucrose and peptone supported growth. Arabinose, lactose, raffinose, H2/CO2, CO/CO2, vanillate, Casamino acids and various purines and pyrimidines did not support growth. Growth on carbohydrates yielded acetate, butyrate, lactate, formate and H2 as end-products. Growth was observed at pH 4.0-9.0, with an optimum at pH 6.5, and at 10-30 degrees C, with an optimum at 20-25 degrees C. At 20 degrees C, doubling times were 4 and 6 h at pH 6.5 and 4.0, respectively. Hydrogenase activity in cell-free extracts was 12 U (mg protein)-1. CK55T did not: (i) contain detectable levels of CO, formate, lactate dehydrogenases or cytochromes; (ii) carry out dissimilatory reduction of nitrate or sulfate; or (iii) produce methane. Thus, CK55T was characterized as a non-acetogenic, fermentative chemo-organotroph. The G+C content of CK55T was 28.0 mol%. CK55T was phylogenetically most closely related to Clostridium botulinum (types B, E and F), Clostridium acetobutylicum and other saccharolytic clostridia; the 16S rRNA gene sequence similarity values to the nearest relatives of CK55T were approximately 97%. Based on morphological, physiological and phylogenetic properties of CK55T, it is proposed that CK55T be termed Clostridium uliginosum sp. nov. (= DSM 12992T = ATCC BAA-53T).


Subject(s)
Clostridium/classification , Phylogeny , Anaerobiosis , Base Sequence , Carbohydrate Metabolism , Clostridium/genetics , Clostridium/physiology , Clostridium/ultrastructure , DNA, Ribosomal/genetics , Enzymes/analysis , Microscopy, Electron , Molecular Sequence Data , RNA, Ribosomal, 16S/genetics , Soil Microbiology
15.
Nervenarzt ; 71(5): 393-400, 2000 May.
Article in German | MEDLINE | ID: mdl-10846715

ABSTRACT

The present study examines episode characteristics in unipolar psychotic depression. From a sample of unipolar endogenous depressed inpatients, patients with a psychotic index episode (n = 19) were compared to nonpsychotic patients (n = 86) with regard to case history, characteristics of the inpatient episode, residual symptoms at discharge from hospital and course of illness up to seven months after discharge. Psychotic depressed patients displayed more severe observer-rated depressive symptoms at admission and were more likely to have attempted suicide prior to admission. In the post-discharge short-term course of depression, these patients showed a more pronounced symptom homogeneity in the extreme ranges, which occurred by stable remissions or by prolonged symptomatology in need of treatment. These findings, together with the observation of higher stabilities of symptom scores in the psychotically depressed, emphasize the prognostic significance of symptomatology at discharge to the post-discharge episode course in these patients.


Subject(s)
Depression/complications , Depressive Disorder/diagnosis , Depressive Disorder/psychology , Psychotic Disorders/diagnosis , Psychotic Disorders/psychology , Acute Disease , Adult , Depression/diagnosis , Depressive Disorder/classification , Depressive Disorder/complications , Depressive Disorder, Major/diagnosis , Depressive Disorder, Major/psychology , Diagnosis, Differential , Disease Progression , Female , Humans , Inpatients , Male , Middle Aged , Prognosis , Psychiatric Status Rating Scales , Psychotic Disorders/etiology , Recurrence , Sampling Studies , Treatment Outcome
16.
Int J Syst Evol Microbiol ; 50 Pt 2: 873-881, 2000 Mar.
Article in English | MEDLINE | ID: mdl-10758899

ABSTRACT

Two anaerobic acid-tolerant bacteria, CK58T and CK74T, were isolated from acidic beech litter and acidic peat-bog soil, respectively. Both bacteria were spore-forming, motile rods with peritrichous flagella. The capacity to sporulate decreased with prolonged cultivation. Cells of CK58T formed chains or aggregates and were linked by a connecting filament that consisted of a core and a surrounding sheath. Cellobiose, glucose, xylose, arabinose, maltose, mannose and salicin supported growth of CK58T. These substrates, as well as mannitol, lactose, sucrose, glycerol, melezitose, raffinose and rhamnose, supported growth of CK74T. Sorbitol, trehalose, H2/CO2, CO/CO2, vanillate, Casamino acids, peptone, and various purines and pyrimidines did not support the growth of either organism. Growth of CK58T and CK74T on glucose yielded butyrate, lactate, acetate, formate, H2 and CO2 as end products. Growth of CK58T and CK74T was observed at pH 3.7-7.1 and 3.6-6.9, respectively. CK58T and CK74T grew in nitrogen-free medium at pH 3.7 under an N2 atmosphere and reduced acetylene at rates approximating 1 nmol min-1 (mg protein)-1. CK58T and CK74T did not contain carbon monoxide dehydrogenase or cytochromes, produce methane, or dissimilate nitrate or sulfate. Thus, CK58T and CK74T were characterized as nonacetogenic, N2-fixing, fermentative chemo-organotrophs. The G + C contents of CK58T and CK74T were 31.4 and 30.7 mol%, respectively. CK58T and CK74T were phylogenetically most closely related to Clostridium pasteurianum. The 16S rRNA gene sequence similarity values of CK58T and CK74T to C. pasteurianum and each other did not exceed 96.5%, and it is proposed that strains CK58T and CK74T be named Clostridium akagii CK58T (DSM 12554T) and Clostridium acidisoli CK74T (DSM 12555T), respectively. These results suggest that previously uncharacterized clostridial species reside and might fix N2 in the annoxic microzones of acidic forest soil and litter.


Subject(s)
Clostridium/classification , Clostridium/physiology , Nitrogen Fixation , Soil Microbiology , Anaerobiosis , Clostridium/isolation & purification , Clostridium/ultrastructure , DNA, Bacterial/genetics , DNA, Ribosomal/genetics , Genes, rRNA , Hydrogen-Ion Concentration , Microscopy, Electron , Molecular Sequence Data , Phylogeny , RNA, Ribosomal, 16S/genetics , Sequence Analysis, DNA , Trees
17.
Ultraschall Med ; 19(1): 28-33, 1998 Feb.
Article in German | MEDLINE | ID: mdl-9577890

ABSTRACT

AIM: To compare the significance of the two-dimensional and three-dimensional sonography in the diagnosis of meniscal tears under clinical conditions. METHODS: Sixty menisci of knees with clinical symptoms (44 medial and 16 lateral menisci) were examined by an identical transducer in a two- and three-dimensional sonography technique. The findings were compared with the diagnosis made with subsequent arthroscopy. RESULTS: In the diagnosis of meniscal lesions the two- and three-dimensional sonography reached a sensitivity of 92% and 100% and a specificity of 83% and 88%, respectively. The positive predictive value of these methods was 58% and 67%. The negative predictive value was 98% and 100%. Because of the good results with the two-dimensional sonography, there were no statistically significant differences between both methods. The three-dimensional sonography, however, proved to be superior, to the two-dimensional sonography in the analysis of subgroups (medial and lateral menisci, menisci with and without clinical symptoms). The negative predictive value of the three-dimensional sonography was 100% for all of these subgroups. CONCLUSION: Although this study shows no significant difference in the results of two- and three-dimensional sonography, the analysis of subgroups displays a slightly improved significance for diagnosis of meniscal tears by three-dimensional sonography. The high negative predictive value shows that three-dimensional sonography, performed by an experienced examiner, may be useful to exclude meniscal tears. This result may help focus further cost-intensive or invasive examinations.


Subject(s)
Image Processing, Computer-Assisted/instrumentation , Knee Injuries/diagnostic imaging , Tibial Meniscus Injuries , Adolescent , Adult , Aged , Chronic Disease , Female , Humans , Male , Menisci, Tibial/diagnostic imaging , Middle Aged , Sensitivity and Specificity , Ultrasonography
18.
Int J Syst Bacteriol ; 47(2): 352-8, 1997 Apr.
Article in English | MEDLINE | ID: mdl-9103621

ABSTRACT

Sporomusa silvacetica sp. nov. DG-1T (= DSMZ 10669T) (T = type strain) was isolated from well-drained, aggregated forest soil (pH 6.0) in east-central Germany. The cells were obligately anaerobic, slightly curved rods and were motile by means of laterally inserted flagella on the concave side of each cell. Typical cells were approximately 3.5 by 0.7 micron. Cells stained weakly gram positive, but thin sections revealed a complex multilayer cell wall. Spores were spherical and distended the sporangia. Growth and substrate utilization occurred with ferulate, vanillate, fructose, betaine, fumarate, 2,3-butanediol, pyruvate, lactate, glycerol, ethanol, methanol, formate, and H2-CO2. With most substrates, acetate was the primary reduced end product and was produced in stoichiometries indicative of an acetyl-coenzyme A pathway-dependent metabolism. Fumarate was dismutated to succinate and acetate. Methoxyl and acrylate groups of various aromatic compounds were O-demethylated and reduced, respectively. Yeast extract was not required for growth. Cells grew optimally at approximately 30 degrees C and pH 6.8; under these conditions and with fructose as the substrate, the doubling time was approximately 14 h. The lowest temperature that supported growth was between 5 and 10 degrees C. The carbon monoxide dehydrogenase and hydrogenase activities were approximately 9 and 102 mumol min-1 mg of protein-1, respectively. A type b cytochrome was detected in the membrane. The G + C content was approximately 43 mol%. Phylogenetic analysis of the 16S ribosomal DNA indicated that DG-1T was most closely related to members of the genus Sporomusa in the Clostridium subphylum of the gram-positive bacteria.


Subject(s)
Clostridium/classification , Gram-Positive Bacteria/classification , Base Composition , Clostridium/genetics , Clostridium/ultrastructure , DNA, Bacterial/chemistry , DNA, Bacterial/genetics , DNA, Ribosomal/genetics , Fermentation , Gram-Positive Bacteria/genetics , Gram-Positive Bacteria/ultrastructure , Microscopy, Electron , Molecular Sequence Data , Phylogeny , RNA, Bacterial/genetics , RNA, Ribosomal, 16S/genetics , Soil Microbiology
19.
Biofactors ; 6(1): 13-24, 1997.
Article in English | MEDLINE | ID: mdl-9233536

ABSTRACT

The four decades of the now classic studies by Harland G. Wood and Lars G. Ljungdahl lead to the resolution of the autotrophic acetyl-CoA 'Wood/Ljungdahl' pathway of acetogenesis. This pathway is the hallmark of acetogens, but is also used by other bacteria, including methanogens and sulfate-reducing bacteria, for both catabolic and anabolic purposes. Thus, the pathway is wide spread in nature and plays an important role in the global turnover of carbon. Because most historical studies with acetogens focused on the biochemistry of the acetyl-CoA pathway, the metabolic diversity and ecology of acetogens remained largely unexplored for many years. Although acetogens were initially conceived to be a somewhat obscure bacteriological group with limited metabolic capabilities, it is now clear that acctogens are arguably the most metabolically diverse group of obligate anaerobes characterized to date. Their anaerobic metabolic arsenal includes the capacity to oxidize diverse substrates, including aromatic, C1, C2, and halogenated compounds, and engage a large number of alternative energy-conserving, terminal electron-accepting processes, including classic fermentations and the dissimilation of inorganic nitrogen. In this regard, one might consider acetogens on a collective basis as the pseudomonads of obligate anaerobes. By virtue of their diverse metabolic talents, acetogens can be found in essentially all habitats. This review evaluates the metabolic versatilities of acetogens relative to both the engagement (regulation) of the acetyl-CoA pathway and the ecological roles likely played by this bacteriogical group.


Subject(s)
Acetic Acid/metabolism , Bacteria/metabolism , Acetyl Coenzyme A/metabolism , Carbon Dioxide/metabolism , Clostridium/metabolism , Gram-Positive Rods/metabolism
20.
Chirurg ; 68(11): 1150-5, 1997 Nov.
Article in German | MEDLINE | ID: mdl-9518207

ABSTRACT

There is no consensus regarding the clinical significance of conventional two-dimensional ultrasound in the diagnosis of meniscal tears of the knee. Three-dimensional ultrasound spatially reconstructs a transparent image of subsequent ultrasound scans. In an experimental study of 96 menisci, radial and oblique tears were detected more often by three-dimensional ultrasound. In a clinical study of 60 menisci the two- and three-dimensional ultrasound reached a sensitivity of 92% and 100%, a specificity of 83% and 88%, a positive predictive value of 58% and 67%, and a negative predictive value of 98% and 100%, respectively. Altogether, there was no statistically significant difference between both methods. The high negative predictive value, however, shows that the three-dimensional ultrasound may be a clinically relevant examination for special questions in the diagnostics of meniscal tears.


Subject(s)
Menisci, Tibial/diagnostic imaging , Tibial Meniscus Injuries , Adolescent , Adult , Aged , Arthroscopy , Confidence Intervals , Female , Humans , Male , Middle Aged , Sensitivity and Specificity , Ultrasonography/instrumentation , Ultrasonography/methods , Ultrasonography/statistics & numerical data
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