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Biomedical subjects

R Schutz

Publications and source records attributed to R Schutz.

6 recordsLinked to original sources
PubMed1992

Risk of HIV infection from transfusion with blood negative for HIV antibody in a west African city.

OBJECTIVE: To estimate the risk of infection with HIV (HIV 1 or HIV 2, or both) from transfusion of a screened unit of blood in a high prevalence area in west Africa. DESIGN: Retrospective cohort study for January-July 1991. SETTING: National Blood Transfusion Centre, Abidjan, Côte d'Ivoire. SUBJECTS: Repeat donors (5831 units of blood) and first time donors (5076 units) in the first five months of 1991. MAIN OUTCOME MEASURES: Prevalence and estimated incidence of HIV infection in repeat and first time donors; estimated rate of potentially infected, HIV antibody negative units; and rate of (false negative) potentially infected units assuming a laboratory test sensitivity of 99%. RESULTS: Overall HIV prevalence was 11.0% in first time donors and 2.1% in repeat donors. In the first seven months of 1991, 29 HIV antibody positive (27 HIV 1, 1 HIV 2, 1 dually reactive) donors with a seronegative unit of blood earlier in the year were identified; 26 had donated blood eight weeks or less before their estimated dates of seroconversion and may have been infectious (minimum rate 26/5831 (4.5/1000 potentially infected units)). Estimated incidence of infection in repeat donors was 1.2-2.5%. Laboratory test insensitivity would result in an estimated 1.1/1000 false negative units from first time donors and 0.2/1000 units from regular donors. The overall rate of potentially infected units (all donors, seroconversions, and errors) was estimated at 5.4-10.6/1000. CONCLUSIONS: The risk of HIV infection from a single unit of blood remains substantial (5.4-10.6/1000 units). To prevent infection from blood transfusion in areas of high incidence and prevalence of HIV all but absolutely essential transfusions should be avoided, and donors with low incidence of HIV infection should be selected.

Blood Donors↗
PubMed1992

[Generalized histoplasmosis due to Histoplasma duboisii with mediastino-pulmonary infection. Cure after 15 months of treatment with ketoconazole].

We report a case of a young burkinabian, who presented with the disseminated african form of histoplasmosis, Histoplasma duboisii. There was pulmonary mediastinal disease with superficial lymphadenopathy and also hepatic involvement. The diagnosis was achieved by a histological examination of the peripheral glands and micrological examination of the expectorate. A clinical cure (despite the radiological persistence of enlarged but stable left hilar glands) with the follow up 10 months was achieved after 15 months of treatment with ketoconazole in a dose which was increased to 10 mg/kg/day.

Biopsy↗
PubMed1992

[Treatment of empyema and pyopneumothorax of infectious origin and chronic evolution by drainage-lavage with iodized polyvinylpyrrolidone].

Thirty five patients, twenty nine men and six women with a mean age of twenty six and suffering from a pyothorax 23% or a pyopneumothorax 77% of whom 41% had a bronchopleural fistula on chronic evolution (greater than one month before drainage), had been treated using drainage and lavage with iodised polyvinylpyrrolidine without local or general antibiotics. This treatment enabled thirty four patients to be cured with some moderate radiological sequelae, a 50% restitution "ad integrum". The importance of the sequelae was correlated with increased aged (P less than 0.001), a delay before drainage (P less than 0.001) and a prolonged duration of drainage (P less than 0.01), to multiple organisms (P less than 0.01) and the presence of a pneumothorax (P less than 0.02) and to a tuberculous origin of the effusion (P less than 0.01). These two latter factors were the cause of a prolongation of the duration of drainage (P less than 0.01). Tuberculous patients who on average were older (P less than 0.05) and had a prolonged period of drainage (P less than 0.01) presented with major immediate radiological sequelae (P less than 0.01). In conclusion the technique of drainage using iodised polyvinylpyrrolidine gave excellent results in cases of non-tuberculous pyothorax in young subjects, but gave less impressive results in subjects suffering from tuberculosis, because of the significant radiological sequelae.

Adolescent↗
PubMed1978

Self-management programmes with mentally retarded workers: implications for developing independent vocational behaviour.

Three research studies were conducted to investigate the differential effects of externally administered, self-administered and self-determined reinforcement contingencies on the work production rates of developmentally disabled workers. The results of Expt. I indicated that Client 1, a profoundly retarded male, would work at equivalent rates under externally administered or self-administered reinforcers. Experiment II indicated that a severely retarded male would also work at a high work rate under a self-determined reinforcement contingency. The results of Expt. III replicated these findings in a more controlled design. Different tasks adapted from community workshops were utilized in each study. The implications of these studies for developing independent vocational behaviour in the retarded were discussed.

Adolescent↗
PubMed1976

The effect of apomorphine and haloperidol on the RNA content of brain structures of the rat.

At a dose of 0.5 mg/kg, apomorphine caused an increase of the RNA content of the septal nucleus of rats (n. medialis + n. lateralis + n. accumbens); after 2.5 mg/kg this effect became more marked and, in addition, there was an increase of RNA in the caudate nucleus. All effects were antagonized by 0.5 mg/kg of haloperidol. These data suggest that apomorphine acts, at different dose levels, on different sites of the brain. This might be related to the also different behavioral effects of apomorphine at those two dose levels. Haloperidol on its own caused a fall of RNA in the amygdaloid nucleus which was not counteracted by any of the two doses of apomorphine. Neither drug had any influence on hypothalamic RNA concentration.

Amygdala↗