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The Canadian Diptera fauna is updated. Numbers of species currently known from Canada, total Barcode Index Numbers (BINs), and estimated numbers of undescribed or unrecorded species are provided for each family. An overview of recent changes in the systematics and Canadian faunistics of major groups is provided as well as some general information on biology and life history. A total of 116 families and 9620 described species of Canadian Diptera are reported, representing more than a 36% increase in species numbers since the last comparable assessment by JF McAlpine et al. (1979). Almost 30,000 BINs have so far been obtained from flies in Canada. Estimates of additional number of species remaining to be documented in the country range from 5200 to 20,400.

Objective: To identify neuropsychological domains, including fine motor dexterity, that are related to social functioning in schizophrenia. Method: Thirty-six DSM-IV schizophrenic subjects were assessed using the Purdue Pegboard test, the Modified Wisconsin Card Sorting test, the Tower of London, Schwartz' Reaction Time and Wechsler's Associate Learning and Digit Span tests. Social functioning was measured by the Social and Occupational Functional Assessment Scale. Results: Univariate regression analyses showed that the Purdue Pegboard, the Modified Card Sorting test, the Tower of London and Wechsler's Associate Learning subtest were significantly linked to social functioning. The best fitting multivariate model to explain social functioning included fine motor dexterity and executive functioning. Conclusion: Various neuropsychological measures correlated to social functioning, the correlation involving fine motor dexterity being the strongest one. Future studies of the prediction of social functioning in schizophrenia should include fine motor dexterity.

Cognitive impairments in depression have recently been proposed as secondary to more basic attentional disturbances. Studies have shown that performance on the Stroop Color-Word Test is impaired in depressives, but it is not clear whether this impairment reflects a primary distractor inhibition disturbance or a more global cognitive dysfunction, such as a reduction of processing resources. In the present study, unmedicated clinical depressives were evaluated using a computerized Stroop Color-Word Test and the Visuo-Spatial Interference Test, a selective attention task that makes fewer demands on resources. Compared with normal subjects, depressives presented increased choice reaction times (CRT) and interference in both tests. Correlations were found between CRT and interferences only in depressives, favoring the processing resource hypothesis. Further exploratory analysis comparing the more rapid depressives and the slower normal subjects on CRT revealed that although these subgroups had comparable CRT, rapid depressives still exhibited increased interference on the Visuo-Spatial Interference Test. Thus, in non- or mildly retarded patients, a specific distractor inhibition deficit was observed in absence of resource deficit.

Background: The objectives of the study were to characterize and compare the cognitive profile and natural evolution of patients presenting late-onset psychotic symptoms (LOPS: onset ≥50 years old) to those of elderly patients (≥50 years old) with life-long/early-onset schizophrenia (EOS: onset Methods: Neuropsychological profiles of 15 LOPS patients were compared to those of 17 elderly EOS patients and to those of two control groups (n = 11/group). The evolution of the two patient groups was compared using an independent diagnostic consensual procedure involving a geriatric psychiatry physician/clinician and a neuropsychologist blinded to the initial psychiatric diagnosis.Results: EOS presented significant memory and executive impairments when compared to controls but there was no significant difference between LOPS and their controls when age and education were taken into account. However, a detailed inspection of normative data suggests more executive impairments in LOPS than in EOS. The clinical judgment of experts was in favour of significant cognitive deficits with or without dementia in most LOPS (82.3%–94.1%) and EOS (80.0%–93.3%) patients. Regarding evolution, mild cognitive impairment (MCI) and vascular cognitive impairment (VCI) were the most common clinical diagnoses made by geriatric psychiatry physicians/clinicians for the LOPS (40%). In addition, 20% of LOPS versus 5.9% of EOS patients met the diagnostic criteria for dementia by consensus of the experts. Cerebral abnormalities were confirmed (CT scan; SPECT) in 73.3% of LOPS patients.Conclusion: The present results suggest cognitive deficits (mostly of executive functions) and vascular and neurodegenerative vulnerability in LOPS. Further studies with larger samples are needed to confirm the present findings.

In a double-blind randomised parallel trial, diltiazem (120mg 2 or 3 times daily) was compared with hydrochlorothiazide/triamterene (25/50 or 50/100mg once daily) for 12 weeks, with regard to blood pressure lowering and adverse effects, in 61 evaluable patients with mild to moderate essential hypertension (diastolic blood pressure ⩾ 95mm Hg). The two treatments were equally effective in reducing blood pressure, and the proportion of responders did not differ. Combined therapy (diltiazem + hydrochlorothiazide/triamterene) was begun in the ensuing 16 weeks (i.e. single-blind phase) in those patients where a diastolic blood pressure of ⩽ 90mm Hg (or a decrease of ⩾ 10mm Hg for those with a baseline of 95 to 99mm Hg) was not achieved. In this instance, a further relevant lowering of blood pressure occurred. An analysis of all patients (monotherapy and combined therapy) showed that goal blood pressure was achieved (p = 0.06) in more patients treated initially with diltiazem (22 of 28 patients, 78.6%) than with hydrochlorothiazide /triamterene (18 of 33 patients, 54.6%). Final mean daily doses were diltiazem 287mg, hydrochlorothiazide/triamterene 28/76mg, and combined therapy 300 + 37.5/75mg, respectively. The incidence of adverse events during treatment with hydrochlorothiazide/triamterene was almost double that observed with diltiazem (46 vs 24%). Headache was the most common complaint in both groups (17 and 14%, respectively). Oedema was also frequent with diltiazem therapy (10.3%), while nausea (11.4%), nervousness (8.6%), decreased libido (8.6%), and weakness (8.6%) were reported only with hydrochlorothiazide/triamterene. Combination therapy was associated with significantly lower mean serum potassium levels and significantly higher mean uric acid levels than was diltiazem monotherapy. In conclusion, diltiazem is as effective as hydrochlorothiazide/triamterene in reducing blood pressure but produces fewer side effects. Combining the 2 treatments results in additional blood pressure reduction. To establish the long term usefulness of diltiazem, it will be essential to evaluate its ability to reduce the morbidity and mortality associated with hypertension, especially the development of congestive heart disease.

Relationships between clinical retardation (measured by the Hamilton Depression Inventory) and selective attention (measured with a computerized version of the Stroop word colour test) were studied in a population of 21 depressed patients. Stroop interference was higher in depressed patients than in normals. Desynchronized presentations of the distractor and the target and intervals between responses and succeeding stimuli permitted depressed subjects to respectively apply and lift inhibition of the distractor so that their interference was reduced to control levels. Finally, successive inhibition scores were correlated with the retardation score in depressed subjects. The results are consistent with the hypothesis of a retardation in the application and the lifting of cognitive inhibition in depression.

Memory deficits in patients with schizophrenia (SZ) are considered as a key feature of the clinical manifestations of the disease. In order to further examine the role and nature of memory deficits in SZ, the pattern of errors in verbal and spatial serial recall tasks committed by SZ patients was compared to that of healthy controls. We also tested the relationship between these memory errors and clinical symptoms.Twenty-seven outpatients with recent-onset SZ and 27 age and gender matched healthy controls had to remember sequences of items (digits or localisations) in a serial recall task. Clinical symptoms were assessed with the PANSS and the SAPS.The results indicate that the number of omissions, intrusions, and transpositions can differentiate patients with SZ from healthy controls. Intrusions and transpositions committed in the verbal domain were associated with the negative subscale of the PANSS. Transposition errors were associated with delusions whether the to-be-remembered information was verbal or spatial.The examination of the pattern of errors, in particular that of transpositions, is a more informative cognitive index than the mere analysis of overall performance, and provides a promising target for treatment.

Disruptive vocalizations (DVs) constitute a serious problem in geriatric nursing homes. The current literature suggests that DV can be interpreted as a way for demented persons with language limitations to communicate with others. In an attempt to test this hypothesis, 59 participants were recruited from six nursing homes to form two groups: one group of individuals with preserved language skills (PLS) and another group with altered language skills (ALS). They were compared on the frequency and types of DV. The results indicate that individuals with ALS manifest DV at a greater frequency than those with PLS. These persons also present a greater number of distinct DV forms. The results are interpreted in terms of language deterioration associated with dementia.

Stroop stimuli were used to measure the negative priming effect in eight positive and 10 negative schizophrenics, 21 depressive and 35 healthy control subjects in order to test hypotheses of insufficient versus persistent cognitive inhibition in schizophrenia. Data show that schizophrenics do not increase their response times to suppressor Stroop items compared to identical but neutral Stroop stimuli because the insufficiency of their inhibitory processes weakens the distractor-suppression effect. However, pre-exposure of the lexical distractor can compensate for insufficient inhibitory mechanisms in positive but not negative schizophrenics, suggesting more severe deterioration in the latter. Depressed subjects showed a slower development of cognitive inhibition. The results suggest important differences in the temporal evolution of inhibitory processes, and are discussed in terms of Hemsley's (1977) and Frith's (1979) theories.

Objective: This is the first study to report a direct comparison of neuropsychological performance in Kraepelinian vs. non-Kraepelinian schizophrenia (SZ). Methods: 17 Kraepelinian and 19 non-Kraepelinian subjects were assessed on a neuropsychological battery including the Purdue Pegboard, Schwartz' Reaction Time task, the Modified Card Sorting Test, the Wechsler's Associate Learning Test and the Digit Span. Results: Kraepelinian schizophrenia was characterized by more impaired performance on the Purdue Pegboard and the Card Sorting test. These differences remained significant when introducing, as covariates, the type of neuroleptic used, the use of anticholinergic medication, age and gender. Differences on the Reaction Time, the Associate Learning and the Digit Span tasks did not reach statistical significance. Conclusions: These results suggest that Kraepelinian schizophrenia is characterized by impaired performance on fine motor dexterity and executive functioning. These results further add to the evidence for the validity of the distinction between Kraepelinian and non-Kraepelinian schizophrenia as a strategy to better understand the factors influencing severity and/or outcome in schizophrenia.

The Stroop Word-Color Test was used to study selective attention deficits in schizophrenic and nonschizophrenic psychiatric patients, compared with nonpsychiatric control subjects. Parts of the Weschler Memory Test and a shortened version of the Stroop Test were administered to test the hypotheses that the attentional deficit could be explained by problems of memory or cognitive fatigue. All patients showed deficits on all of the Stroop scales, but closer analysis of the results permitted discrimination of schizophrenic from nonschizophrenic patients. Schizophrenic patients showed as much difficulty as nonschizophrenic subjects on a limited-duration selective-attention task, but deteriorated significantly more when selective attention had to be maintained. The results could not be attributed to memory problems in the schizophrenic group. The results support the existence of two separable selective attention deficits in schizophrenic patients: a difficulty in selectively attending to the salient aspect of a complex stimulus, a difficulty shared with nonschizophrenic subjects, and a difficulty in maintaining selective attention over time that seems to be more marked in schizophrenic subjects.

We report 2 cases of nephrogenic adenoma several years after successful cadaver kidney transplantation. In 1 case the lesion had cytomegalovirus inclusions, and we observed a marked and sustained reduction in the extension of the lesion with cessation of azathioprine. Surgical trauma and cytomegalovirus infections are discussed as etiologic factors. Conservative treatment seemed appropriate.

The increased incidence of malignancies after renal transplantation has been well documented. We describe the first reported case of a nephroblastoma (Wilms tumor) occurring in the host kidney of an adult after renal transplantation.

A 32-year-old white man with essential hypertension presented with three episodes of acute and severe pulmonary allergic pneumonitis on ingestion of one 50-mg tablet of hydrochlorothiazide...