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Biomedical subjects

R M Díaz

Publications and source records attributed to R M Díaz.

11 recordsLinked to original sources
PubMed2004

Early diagnosis of candidiasis in non-neutropenic critically ill patients.

OBJECTIVE: To determine a method for the early diagnosis of candidiasis in non-neutropenic critically ill patients in order to reduce mortality. METHODS: A prospective study in non-neutropenic critically patients in whom Candida spp. were detected, was made in an intensive care unit (ICU) during an 8-year period from 3389 patients admitted. A diagnostic and therapeutic protocol was designed. Invasive candidiasis was defined according to dissemination and multifocality. RESULTS: Candida spp. were found in 145 cases (4.3%): 120 (83%) were considered as invasive candidiasis and 25 as colonisation (17%). The hospital mortality was 46% (67/145). A post-mortem study was carried out in 54% (36/67) of hospital deaths. Candida albicans was the most frequently isolated species (87%), followed by Candida glabrata (18%). There were 24 candidemias and three cases of endophtalmitis. Digestive and respiratory samples and non-C. albicans yeasts were risk factors for invasive candidiasis. The mortality rate was related statistically to invasive candidiasis and inversely to the appropriate antifungal treatment. CONCLUSIONS: Invasive candidiasis is related to digestive and respiratory samples and to the presence of non-C. albicans species. A simpler definition of invasive candidiasis in non-neutropenic critically ill patients will permit more rapid and accurate specific antifungal therapy.

Antifungal Agents↗
PubMed2003

A prospective, randomized study in critically ill patients using the Oligon Vantex catheter.

Microbial colonization and the incidence of catheter-related bloodstream infections (CR-BSI) associated with Oligon Vantex silver central venous catheters (CVC) in critically ill patients were determined. A prospective, randomized, controlled 17-month trial was carried out in an intensive care unit (ICU). All patients requiring a triple-lumen CVC for four days or longer were enrolled. Patients were randomized to receive a standard polyurethane CVC or an Oligon Vantex silver CVC. Before removal of the catheter either due to discharge from the ICU or suspected infection, blood for cultures was taken via the CVC and a peripheral site. Skin and hub swabs and catheter-tips were also cultured. Two hundred and six catheters, 103 in both groups, were evaluated. In the control group (CG) 45/103 (44%) and in the silver group (SG) 30/103 (29%) were colonized or had a CR-BSI (P=0.04). The SG was less likely to be colonized than the CG when the catheter remained in situ for eight days or less (P=0.03) or over 15 days (P=0.01); a second or subsequent catheter was present in the same patient (P=0.002), or if the CVC was placed in the internal jugular vein (P=0.05). Multivariate logistic-regression showed predisposing factors for catheter colonization were jugular and femoral sites, second or subsequent catheter, and being a member of the CG. CR-BSI occurred in five cases (four in CG). Rates of CR-BSI per 1000 catheter-days in the CG were 2.8 and in the SG, 0.8 (P<0.001). The Oligon Vantex silver catheter reduced the incidence of catheter-colonization and may decrease the risk of CR-BSI.

Adolescent↗
PubMed2001

The utility of serology in diagnosing candidosis in non-neutropenic critically ill patients.

This study was carried out to evaluate the utility of serological tests in the diagnosis of candidal infections in non-neutropenic critically ill patients. A prospective study was carried out in a 10-bed general intensive care unit; all patients with at least one organic sample with Candida spp. were included. A therapeutic-diagnostic algorithm was designed, and patients were treated or not, according to a classification. Blood samples were taken, and serological tests included: antigenaemia detection using two different commercial latex kits (Cand-Tec and Pastorex) and antibody detection by indirect haemagglutination (IHA) and indirect germ tube immunofluorescence (IFA). A total of 56% of antibody tests (IHA 45% and IFA 64%) and 26% of antigen tests (Cand-Tec 36% and Pastorex 17%) were positive. The sensitivity and specificity of these tests with respect to systemic candidosis were 37% and 78%, respectively, for antibodies, and 0% and 90% for antigens. There was statistical significance for mortality and low levels of antibodies; Candida glabrata was detected by IFA and Candida tropicalis by Cand-Tec. Serological tests may help to define the prognosis of these patients and to support the detection of specific Candida species.

Antibodies, Fungal↗
PubMed2001

The impact of homophobia, poverty, and racism on the mental health of gay and bisexual Latino men: findings from 3 US cities.

OBJECTIVES: This study assessed the relation between experiences of social discrimination (homophobia, racism, and financial hardship) and symptoms of psychologic distress (anxiety, depression, and suicidal ideation) among self-identified gay and bisexual Latino men in the United States. METHODS: Data were collected from a probability sample of 912 men (self-identified as both Latino and nonheterosexual) recruited from the venues and public social spaces identified as both Latino and gay in the cities of Miami, Los Angeles, and New York. RESULTS: The study showed high prevalence rates of psychologic symptoms of distress in the population of gay Latino men during the 6 months before the interview, including suicidal ideation (17% prevalence), anxiety (44%), and depressed mood (80%). In both univariate and multivariate analyses, experiences of social discrimination were strong predictors of psychologic symptoms. CONCLUSIONS: The mental health difficulties experienced by many gay and bisexual Latino men in the United States are directly related to a social context of oppression that leads to social alienation, low self-esteem, and symptoms of psychologic distress.

Adult↗
PubMed1999

Targeting "risky" gender ideologies: constructing a community-driven, theory-based HIV prevention intervention for youth.

Since the beginning of the HIV epidemic, school-based HIV prevention education targeting youth has taken many forms. Although there has been some success, educators continue to be challenged by situations in which youth are knowledgeable about HIV but continue to engage in risky sexual behavior. In this article, the authors propose that the underlying or implicit theories about teenagers' sexual risk behavior that guide most of these prevention activities are not accurate descriptions or valid explanations of sexual risk in this population. The article is divided into three major sections. First, the authors articulate the theories underlying HIV prevention activities that are typically found in standard school-based prevention curricula, discussing both their limitations and strengths. Second, they discuss their increased awareness of the role of gender ideologies and sexual scripts in the sexual lives of youth. Finally, the authors describe their current HIV prevention activity ("The Game") as it emerges and is shaped by their increasing understanding of the critical role of gender-based ideologies and sexual scripts in young people's sexual risk behavior.

Adolescent↗
PubMed1994

Antimicrobial activity of natural and semisynthetic diterpenoids from Sideritis spp.

The antimicrobial activity of 22 natural diterpenoids of endemic Sideritis from Eastern Andalusia (Spain) is described. Only ent-kaur-16-ene foliol and ent-beyer-15-ene isopusillatriol proved to be active towards Gram-positive and acid-fast bacteria. The introduction of a ketonic group at C-15 on ent-kaur-16-enic systems produced a remarkable degree of activity.

Anti-Bacterial Agents↗
PubMed1992

[Effectiveness of short-term corticosteroid therapy in patients with acute bronchial asthma in Puerto Rico].

This is a pilot study realized in the San Juan City Hospital Pediatric Emergency Room to determine the efficacy of the short-term use of corticosteroids in pediatric patients (5 to 6 years old) with the diagnosis of acute bronchial asthma during the months of March to June 1992. Twenty three (23) cases were evaluated, of which, 8 cases were excluded because they did not comply with the eligibility criterias. The treatment was implemented in a random fashion, which consisted of one control group of treatment with different corticosteroids in combination with albuterol. The patients were evaluated at 0, 2, 6, 12 and 24 hr of therapy a pulmonary index, peak expiratory flow rate (PEFR) and pulse oximeter saturation. On admission to the study the average pulmonary index was 6 and PEFR of less than -3sd. When the patients achieved a pulmonary index of < 4, PEFR > 70% and pulse oxygen saturation of > 95% they were discharged. They were reevaluated at 5 to 7 days and 10 to 14 days after discharge. Using the same objective parameters patients that used corticosteroids had a tendency to improve or maintain the pulmonary index, PEFR and oxygen saturation between normal values. In this study it was possible to identify a tendency in the patients who used corticosteroids: the hospitalizations and exacerbations were less. The extension of the study in terms of population sample offers a better statistical representation to determine the real tendency or conclusions.

Acute Disease↗
PubMed1991

[Review of tetanus points of entry. Study of 229 cases].

A revision of tetanus points of entry in 229 tetanic patients who were cared for at the Hospital del Mar, Barcelona, between 1970 and 1983, i carried out in order to determine in which kind of patients a adequate prophylaxis is not performed. It is found that 83% of point of entry are wounds which are not medically assisted. At the same time points of entry are classified in four main groups: a first group consisting of wounds localized in head and extremities (46.8%), second group to contaminated intramuscular injections (21.8%) a third group related to surgical and obstetric procedures (15.3%) an a fourth group which includes other points of entry not included in the previous groups (16.2%). This classification permits the detection of epidemiological characteristics of each group and the observation of the possible influence of point of entry on the evolution and prognosis of tetanus highlighting that the most severe situations are due to intramuscular injections and surgical and obstetric procedures. With this study we can conclude that an adequate antitetanic prophylaxis must not be restricted to high risk patients, but should be extended to the whole population.

Adult↗
PubMedDate not supplied

When learning a second language does not mean losing the first: bilingual language development in low-income, Spanish-speaking children attending bilingual preschool.

This article discusses two investigations which explored the bilingual language development outcomes of comparable groups of low-income, Spanish-speaking, Mexican American children who either did or did not attended a bilingual (Spanish/English) preschool. Study 1 is a replication of a study by Rodríguez, Díaz, Duran, and Espinosa, involving a new sample of 26 children who attended bilingual preschool for one year and 20 control children who remained at home. Study 2 represents a 1-year, longitudinal follow-up of Rodríguez et al.'s, sample of children during and after the children spent another year at home or in the preschool. In both investigations, standardized, objective measures of three components of children's language proficiency (productive language, receptive language, and language complexity) in English and Spanish were obtained at the beginning and end of the academic year. Contrary to fears that have been expressed by some that early exposure to English would lead to children's native language loss, the results of both studies offered no evidence of Spanish proficiency loss for children attending bilingual preschool. Children who attended bilingual preschool, compared to those who remained at home, showed significant and parallel gains in Spanish language development as well as significant and greater increases in English language proficiency over time. Results are discussed in terms of the need for more systematic research to be conducted in this area to inform policy and practice in the early education and development of language-minority children.

Achievement↗
PubMedDate not supplied

[Epilepsy, cerebral calcifications and coeliac disease. The importance of an early diagnosis].

INTRODUCTION: Coeliac disease (CD) has been linked to several neurological disorders, with a clearly higher incidence of epilepsy than in the general population. Since Gobbi's original description of the epilepsy with cerebral calcifications and coeliac disease syndrome in 1992, various reports have been published concerning different stages of development, although a number of questions remain to be answered with respect to its pathogenesis. The aim of this study is to describe the clinical symptoms and progression of three patients with the characteristic syndrome, who were diagnosed in the early stages of the disease. CASE REPORTS: We describe the cases of three males, of school age, who visited because of partial seizures with visual symptoms that were secondarily generalised. A tomography scan of the head revealed bilateral occipital calcifications in all cases. The electroencephalogram showed temporooccipital paroxysmal discharges with a normal background rhythm. Tests for antiendomysium and antigliadin antibodies, with positive results, and a small intestine biopsy study were requested, which confirmed the suspicion of a grade 3 severe enteropathy. All the patients, following a gluten-free diet and taking anticonvulsants, were free of seizures in the follow-up (1, 2 and 8 years). CONCLUSIONS: It is of vital importance to investigate CD in any patient with epilepsy and occipital cerebral calcifications, even in the absence of digestive symptoms, since early diagnosis and treatment with exclusion of gluten affect how the syndrome courses later on.

Brain↗