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Biomedical subjects

R Vidal

Publications and source records attributed to R Vidal.

At least 163 records · Page 9Linked to original sources
PubMed1989

[Type TEM beta-lactamase activity in a Neisseria meningitidis strain].

We studied the beta-lactamase activity characteristics of a penicillin G resistant N. meningitidis strain (MIC = 8 micrograms/ml) isolated from a septicemic process, in an eleven month old girl, attended in the Sabadell Hospital (Barcelona). The beta-lactamase substrate profile was broad-spectrum (it hydrolyses penicillin G and cephaloridine) and the nitrocefin hydrolysis was inhibited by clavulanic acid. The analytical isoelectric focusing of the enzyme showed that the isoelectric point of the main band and, the secondary bands, were compatible with those of the type TEM-1 standard enzyme. We also obtained a positive DNA-DNA hybridization with the TEM-1 beta-lactamase (pBR322 plasmid).

Humans↗
PubMed1988

Diagnostic value of bronchoalveolar lavage in suspected pulmonary tuberculosis.

Of 222 patients suspected of having pulmonary tuberculosis (PT), studied during a one-year period, we performed fiberoptic bronchoscopy together with bronchoalveolar lavage (BAL), bronchial washing and postbronchoscopy sputum smears and Löwenstein cultures in 20 patients. Bronchoalveolar lavage proved to be the most effective method leading to diagnosis in 17 of 20 cases. Diagnosis was obtained in 11 of 20 cases using bronchial washing and postbronchoscopy sputum. The results of this study suggest that bronchoscopy may be required in selected cases for the diagnosis of PT. However, it should be accompanied by BAL, bronchial washings and postbronchoscopy sputum smears. Indications for bronchoscopy as a diagnostic tool for PT may include: (a) patients suspected of having PT with negative smears and in whom treatment must be started due to clinical status; (b) suspicion of associated neoplasia; (c) selected patients with negative Löwenstein cultures; (d) lack of material being obtained by simpler methods.

Adolescent↗
PubMed1986

Effect of life in industrialized societies on hearing in natives of Easter Island.

In an effort to determine whether life in industrialized societies can have an effect on hearing, 90 natives from Easter Island over 45 years old were evaluated. They underwent complete clinical and audiological assessment and were divided into groups according to those having lived only on the island or those having lived in modern civilization. With all factors being equal, except exposure to modern civilization, our results showed that living in civilized societies has a significant negative effect on hearing; the severity is directly proportional to the years of exposure. The median hearing thresholds of natives always living on the island (men and women combined) was found to be similar to those of female citizens of the United States; there was no significant difference in hearing thresholds between men and women among these natives. These results suggest that there are no significant inherent racial differences nor significant inherent differences between males and females in the sensitivity of hearing. A relationship between aging and hearing was noted and interpreted as true or intrinsic presbycusis. There were no cases of otosclerosis, Meniere's disease, or exostoses of the external ear canal among natives who had always lived on the island. Pure natives were found not to be prone to otitis media in spite of having an extremely high incidence of severe upper respiratory tract allergies.

Aged↗
PubMed1985

[Comb-like rhythm: an EEG pattern peculiar to leucinosis].

EEG and clinical aspects of a newborn baby with maple syrup urine disease are presented. EEG shows in central areas "Comb-like rhytms" with pseudo-periodic background activity. These patterns seem peculiar to maple syrup urine disease according to Trottier et al. (1975). EEG findings may suggest screening for aminoacids.

Electroencephalography↗