Utilization of acrylonitrile by bacteria isolated from petrochemical waste waters

A bacterium, utilising acrylonitrile as a sole source of carbon and nitrogen, was isolated from Indian Petrochemical Corporation Limited (IPCL) waste waters and identified as Arthrobacter sp. This strain could also utilize acetonitrile, acetamide and acrylamide individually as a source of carbon and nitrogen. The metabolic studies with the whole cells indicated the sequential conversion of the nitrile to the respective amide and then to the respective acid and ammonia. The rate of nitrile hydrolysis was slower than the corresponding amide hydrolysis. Acrylic acid, the end product of acrylonitrile breakdown, did not support the growth when provided as a carbon source.

The effect of hypoparathyroidism on the aging skeleton

Serum concentrations of parathyroid hormone are frequently increased in elderly subjects. How much this increase may contribute to the development of osteoporosis in such subjects is unknown. Long-standing hypoparathyroidism has been reported to be accompanied by an increase in skeletal density. In seven consecutive women, aged 40 to 83 years, with hypoparathyroidism of at least 18 years duration, the mineral density in the lumbar vertebrae was measured by quantitative computed tomography (QCT) and dual photon absorptiometry (DPA). In these subjects, the bone mineral density by dual photon absorptiometry was 1.4 to 6.2 standard deviations above mean values for age-matched normal women. However, the mineral density of vertebral trabecular bone as determined by quantitative computed tomography was only slightly increased above values reported for normal women. The differences between the values determined by dual photon absorptiometry and quantitative computed tomography indicate that most of the increase in mineral density was a reflection of increased cortical bone. Roentgenograms of the metacarpals did not reveal consistent differences between normals and the hypoparathyroid subjects. These findings suggest the possibility that control of parathyroid function might be of value in treating osteoporotic patients.

Failure to differentiate bipolar disorder from schizophrenia on measures of neuropsychological function

30 inpatients diagnosed with schizophrenia were compared to 35 inpatients with bipolar affective disorder, manic type, on a large group of neuropsychological measures. Separate factor analyses were performed on measures of verbal, spatial, and speed variables in order to generate summary scales. Controlling for the effects of age, education, sex, duration of illness, number of previous hospitalizations, and medications at time of testing, there were no significant differences between diagnostic groups on the three factors or on individual test variables. Patients on medication performed more poorly on speed variables than those off medication. These findings call into question the notion of differential patterns of cognitive deficit among psychotic diagnoses.

Long-term continuation antidepressant treatment: a comparison study

This retrospective study examined the clinical characteristics and the course of 26 patients with major affective disorders who repeatedly relapsed during or shortly after antidepressant tapering off at the usual 6-12-month intervals. The patients apparently required long-term antidepressant continuation therapy not preventive therapy, as they were unable to be successfully tapered off antidepressants over a mean of 36.6 months. In contrast with a group of 15 randomly selected patients with a more typical recurrent course of illness and successful tapers after 6-12 months of treatment, the long-term continuation therapy patients were younger, had a longer duration of depression before entering treatment, and were more likely to meet the DSM-III criteria for concomitant dysthymic, panic, or personality disorder or major depression with psychotic features. The findings suggest that secondary Axis I and Axis II diagnoses in antidepressant-responsive depressed patients are associated with the need for long-term continuation treatment.

Characterization of a wide host range plasmid pANV-6 from Citrobacter diversus

pANV-6 is a 5.85 kb, streptomycin resistant, high copy number plasmid isolated from a multi drug resistant clinical isolate of C. diversus by transformation in Escherichia coli C-600. The plasmid was very stable, noncurable and could not be amplified with chloramphenicol. It was non-conjugative among Enterobacteriaceae hosts. Plasmid was transferred by transformation to several Gram negative and Gram positive hosts. These included Esch. coli, Serratia marcescens, Salmonella typhimurium, Klebsiella pneumoniae, Staphylococcus aureus, Corynebacterium glutamicum. From Staph. aureus it was transferred by conjugation to other Staph. aureus, Staph. epidermidis and Bacillus subtilis. Plasmid was incompatible with standard plasmids belonging to incompatibility groups H1, H2 = S,J,P and T of coliform bacteria. Plasmid has one site for restriction enzyme EcoRI and Pst I, three for Bgl 1 and non for Bgl 1, Bam HI, Hind III and X ba I.

Clonazepam treatment of five lithium-refractory patients with bipolar disorder

The authors describe the first five patients enrolled in an open clinical trial of clonazepam as a maintenance treatment in lithium-refractory bipolar disorder. All patients relapsed quickly after taking clonazepam (one within 2 weeks and four within 10-15 weeks), and the study was prematurely terminated. The results cast doubt over the usefulness of clonazepam as a prophylaxis in lithium-resistant bipolar patients who have histories of psychotic mania or delusional depression.

Failure to detect organic factors in mania

Forty patients from an outpatient lithium clinic were studied who had a clear history of organic abnormalities which predated their affective symptomatology. In the course of reviewing the clinical histories regarding these patients, it was observed that only 37.5% of the patients had ever received a clinical diagnosis of organic affective syndrome. Variables associated with a failure to consider a diagnosis of organic affective syndrome were investigated.

Lithium in the treatment of bipolar disorders associated with epilepsy: an open study

Eight DSM-III bipolar patients with seizure disorders were treated in an open study evaluating the effects of maintenance lithium treatment on affective relapses and clinical seizure activity. Lithium was effective in preventing the recurrence of affective episodes without worsening seizure frequency in patients with active seizures and did not induce seizures in those whose seizures were in remission. One patient showed remission of both affective and seizure symptoms on lithium alone. Lithium appears to be safe and effective in bipolar disorders associated with epilepsy and may have an anticonvulsant effect in some patients.

Cognitive function in manics with associated neurologic factors

Researchers studying cognition in mania have assumed that mania is a homogeneous entity. Recent preliminary evidence indicates that some manic syndromes may be preceded by medical, pharmacological, and neurologic antecedents. While DSM-III suggests that mild cognitive impairment may be associated with these manic syndromes, studies to date have not documented this assertion. We compared bipolar patients with antecedent neurologic factors (neurologic manics, NM) to bipolar patients without such histories (primary manics, PM) on standard neuropsychological measures and clinical parameters to ascertain whether cognitive testing could be used as an adjunctive diagnostic tool in defining this subgroup of patients. Results indicated that the NM group was more dysfunctional in intellectual functioning and course of psychiatric illness than the PM group.

Proposed delusional depression subtypes: preliminary evidence from a retrospective study of phenomenology and treatment course

An analysis of the phenomenology and treatment course of 52 subjects with delusional depression suggests that there may be various subtypes: bipolar, early-onset unipolar and possibly a late-onset unipolar. The bipolar subgroup tended to relapse in different but always psychotic directions, and was resistant to lithium carbonate treatment alone. Treatment refractoriness, delusional depressive recurrences, and a dementia-like presentation were associated with a small late-onset subgroup. A high rate of delusionally depressive relapses also characterized the early-onset unipolar group, however, patients with single episodes were found only in this subgroup.

Alcoholism

Alcoholism is a major health problem that impinges on a multitude of areas. This article will emphasize common primary care presentations, diagnosis, genetics, epidemiology, medical complications, and management.

Mania with associated organic factors

Thirty-nine patients with bipolar illness preceded by organic factors were compared to age and sex matched bipolar controls. The patients with pre-existing organic factors were older at onset of their bipolar illness, had fewer depressive episodes, less family history of affective disorder, and were symptomatically different in a number of respects. The nosology of such disorders is discussed and the literature reviewed.

Life events and relapse in bipolar disorder: the impact of a catastrophic event

The literature on life events and the precipitation of bipolar disorder is reviewed. The authors describe an unexpected increase in bipolar relapses in a Lithium Clinic following a catastrophic life event, a hurricane, and contrast the patients who relapsed with an age and sex matched control of bipolars who did not. Though retrospective, the study avoids the question of the independence of life events. The results suggest that certain bipolar patients, especially those recently unstable, may be more vulnerable to the impact of life events.