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Biomedical subjects

R Díaz

Publications and source records attributed to R Díaz.

At least 109 records · Page 6Linked to original sources
PubMed1982

[Enteritis caused by Campylobacter fetus in Navarre].

C. fetus ss jejuni was demonstrated in stool samples from 17 patients, among 605 studied, using the selective media of Skirrow. 13 of them were children, 11 two years' old or younger, and 4 were adult patients. The frequency of isolation of C. fetus ss jejuni in stool cultures has been greater than the isolation of Y. enterocolitica serotype 3, S. sonnei and E. coli, and has been only superated by the isolation of microorganisms belonging to the generus Salmonella.

Adolescent↗
PubMed1978

Rose Bengal plate agglutination and counterimmunoelectrophoresis tests on spinal fluid in the diagnosis of Brucella meningitis.

Rose Bengal and counterimmunoelectrophoresis, two tests that detect antibodies against different structural antigens, when carried out on spinal fluid permitted rapid diagnosis of human Brucella meningitis. The Rose Bengal test was positive in five out of five patients studied, and counterimmunoelectrophoresis was positive in all but one. The Brucella meningitis was characterized by an increase of immunoglobulin G in the cerebrospinal fluid.

Agglutination Tests↗
PubMed1976

The uptake of 2-ketogluconate by Pseudomonas putida.

The uptake of 2-ketogluconate is inducible in Pseudomonas putida: 2-ketogluconate, glucose, gluconate, glycerol and glycerate were each good nutritional inducers of this ability. 2-Ketogluconate uptake obeyed saturation kinetics (apparent Km in 2-ketogluconate-grown cells was 0.4 mM). 2-Ketogluconate was transported against a concentration gradient, apparently in an unchanged state, and the process required metabolic energy, all of which indicate an active transport system. A number of independently isolated mutants with deranged activity of a common glucose-gluconate uptake system were found to be also defective in 2-ketogluconate transport. Strains unable to transport 2-ketogluconate which grew readily on glucose and gluconate were also isolated. These results suggest that 2-ketogluconate transport is governed by at least two genetic elements: one which is also required to take up glucose and gluconate and another which appears to be specific for 2-ketogluconate transport. Similarly, glucose and gluconate transport appears to require at least one factor which is not necessary for 2-ketogluconate transport, as suggested by the lack of induction of the common glucose-gluconate uptake system by glycerol and glycerate, substrates which are good inducers of 2-ketogluconate uptake.

Biological Transport, Active↗
PubMedDate not supplied

[Epidemiology and costs of severe sepsis in Madrid. A hospital discharge study].

BACKGROUND AND OBJECTIVE: Severe sepsis is a complex syndrome to define, diagnose and treat. This population-based study describes the epidemiology of sepsis in the Region of Madrid, estimates its incidence and mortality, and assesses its impact on hospital stays and costs. PATIENTS AND METHODS: The source of information was the Minimum Basic Hospital Data Set from the Region of Madrid in 2001. Severe sepsis cases were defined as discharges with a combination of organic failure and presence or suspicion of infection through a combination of codes previously proposed and utilized. A descriptive study was performed, incidence rates were calculated, lengths of stay and costs were estimated, and mortality was analyzed. RESULTS: 6,968 episodes were identified. Mean age was 62.5 year. 59.7% were male. Annual incidence was 14.1/10,000 inhabitants, being highest for those 84 and older (230.8/10,000). 1.7 infections per episode were detected. More frequently identified microorganisms were Streptococcus sp., Staphylococcus sp., Escherichia coli and Candida sp. The most frequent organic dysfunctions were renal (39.7%) and respiratory (35.7%). Mortality was 33%. Mortality was higher in cases with more than one organic failure, hepatic dysfunction or cancer. Mean length of stay was 28.9 day. Annual overall costs were 70 million euros. CONCLUSIONS: Severe sepsis is a frequent process, with a high mortality and a significant impact on health care resource utilization.

Adolescent↗
PubMedDate not supplied

Correlates of HIV risk in a random sample of street youths in San Francisco.

In a random sample of 203 street youths recruited in the Haight-Ashbury neighborhood of San Francisco, the authors found significant differences between those who reported that they could go home if they wanted to compared to those who perceived that they could not go back home. Those who could not go home were significantly more likely to report having been away from home for more than 3 years, having run away before age 13, having been kicked out of their home, and not being in touch with their parents compared to the other group. Those who could not go home reported significantly more-injection drug use, which puts them at high risk for HIV. Health care providers can identify street youths at highest risk by asking the question "Could you go back home today if you wanted to do so?"

Adolescent↗