34 results on '"López, M. V."'
Search Results
2. Relationship between pathogenic, clinical, and virulence factors of Staphylococcus aureus in infective endocarditis versus uncomplicated bacteremia: a case–control study
- Author
-
Gallardo-García, M. M., Sánchez-Espín, G., Ivanova-Georgieva, R., Ruíz-Morales, J., Rodríguez-Bailón, I., Viñuela González, V., and García-López, M. V.
- Published
- 2016
- Full Text
- View/download PDF
3. Mycobiota from Cyclamen persicum and Its Interaction with Botrytis cinerea
- Author
-
Rivera, M. C., López, M. V., and Lopez, S. E.
- Published
- 2009
- Full Text
- View/download PDF
4. Is low docosahexaenoic acid associated with disturbed rhythms and neurodevelopment in offsprings of diabetic mothers?
- Author
-
Zornoza-Moreno, M, Fuentes-Hernández, S, Carrión, V, Alcántara-López, M V, Madrid, J A, López-Soler, C, Sánchez-Solís, M, and Larqué, E
- Published
- 2014
- Full Text
- View/download PDF
5. Spatial Variability of Soil Surface Properties and Consequences for the Annual and Monthly Water Balance of a Semiarid Environment (EFEDA Experiment)
- Author
-
Braud, Isabelle, Haverkamp, Randel, Arrúe, J. L., and López, M. V.
- Published
- 2003
6. The influence of manganese on the microstructure and the strength of a ZA-27 alloy
- Author
-
Domínguez, C., López, M. V. Moreno, and Ríos-Jara, D.
- Published
- 2002
- Full Text
- View/download PDF
7. Pseudomonas populations causing pith necrosis of tomato and pepper in Argentina are highly diverse
- Author
-
Alippi, A. M., Dal Bo, E., Ronco, L. B., López, M. V., López, A. C., and Aguilar, O. M.
- Published
- 2003
8. Estimating the van Genuchten retention curve parameters of undisturbed soil from a single upward infiltration measurement.
- Author
-
Moret-Fernández, D., Peña-Sancho, C., Latorre, B., Pueyo, Y., and López, M. V.
- Published
- 2017
- Full Text
- View/download PDF
9. Pressure pain mapping for the investigation of mechanical sensitivity among elite male football players:effect of turf type
- Author
-
Dominguez-Martin, M. A., López-Ruiz, F., Reyes-López, M. V., Valenza, G., Fernandez-de-las-Penas, Cesar, and Madeleine, Pascal
- Published
- 2012
10. Phytophthora nicotianae causando podridão de raiz e caule em Dieffenbachia picta em Buenos Aires, Argentina
- Author
-
Palmucci, H. E., Grijalba, P. E., Wolcan, S. M., Guillin, E., López, M. V., Herrera, C., and Fantino, E.
- Subjects
CAMILLA ,DIEFFENBACHIA ,DIEFFENBACHIA SEGUINE ,OOMYCETES ,fungi ,food and beverages ,SUSCEPTIBILITY ,PHYTOPHTHORA ,ORNAMENTALS ,PERONOSPOROMYCETES ,PHYTOPHTHORA NICOTIANAE - Abstract
327-331 Dieffenbachia picta is a worldwide appreciated crop due to its ornamental value. In Argentina it is cultivated in warm provinces and in the outskirts of Buenos Aires city, where in spring 2007 a great amount of plants were lost in commercial greenhouses. Symptoms such as wilting and soaked lesions in the basal leaves began in four- to six-month-old plants causing plants to wilt due to basal stem and root rot processes. A Peronosporomycete was consistently isolated from diseased tissues. The pathogen was identified as Phytophthora nicotianae based on cultural characteristics, morphology of vegetative and reproductive structures, and on the analysis of the sequence of the nuclear ribosomal internal transcribed spacer (ITS) region. Pathogenicity tests were carried out and Koch's postulates were fulfilled. In complementary studies, the dieffenbachia varieties Alex, Compact, Camilla and Marianne were susceptible to the infection caused by P. nicotianae, whereas Tropic snow (D. amonea) was resistant. This is the first report of P. nicotianae causing stem and root rot of D. picta in Argentina and in the Americas.
- Published
- 2011
11. Effects of tillage on the soil water retention curve during a fallow period of a semiarid dryland.
- Author
-
Peña-Sancho, C., López, M. V., Gracia, R., and Moret-Fernández, D.
- Published
- 2017
- Full Text
- View/download PDF
12. Influence of the wetting process on estimation of the waterretention curve of tilled soils.
- Author
-
Moret-Fernández, D., Peña-Sancho, C., and López, M. V.
- Published
- 2016
- Full Text
- View/download PDF
13. Applicability of the photogrammetry technique to determine the volume and the bulk density of small soil aggregates.
- Author
-
Moret-Fernández, D., Latorre, B., Peña, C., González-Cebollada, C., and López, M. V.
- Published
- 2016
- Full Text
- View/download PDF
14. Conservation Agriculture Under Mediterranean Conditions in Spain.
- Author
-
Moreno, F., Arrúe, J. L., Cantero-Martínez, C., López, M. V., Murillo, J. M., Sombrero, A., López-Garrido, R., Madejón, E., Moret, D., and Álvaro-Fuentes, J.
- Abstract
Intensive agriculture with deep tillage and soil inversion causes rapid soil deterioration with loss of soil organic matter content. This practice leads to a decrease of soil biological activity, a damage of the physical properties and a reduction of crop yields. Conservation agriculture aims to achieve sustainable and profitable agriculture through the application of three basic principles: minimal soil disturbance by conservation tillage, permanent soil cover and crop rotations. Any practice of conservation agriculture must maintain on the soil enough surface residues throughout the year. Conservation tillage is thus any tillage and planting system that maintains at least 30% of the soil surface covered by residues after planting to reduce soil erosion by water. Here we review the main advances about the adoption of conservation agriculture under Mediterranean conditions in Spain. There are major cost savings, e.g. fuel and fertilizer costs, compared with conventional agriculture. Conservation tillage has been proven to be highly efficient for water storage, to increase moderately the organic matter in the soil top layer, and to improve soil physical properties and aggregation. However, no tillage may induce greater soil compaction in some cases. In this case, an occasional tillage is advised. Furthermore, conservation tillage can reduce soil CO
2 emissions, mobility and persistence of herbicides. In general, conservation tillage enhances biodiversity compared to conventional tillage. Crop yields under conservation tillage are similar or even greater than yields of traditional tillage. All these benefits show that -conservation agriculture in Spain is a more sustainable alternative than conventional agriculture. Nonetheless, we have found from the literature analysis some constraints for its adoption, mainly due to inadequate extension and technology transfer systems and lack of access to specific inputs. [ABSTRACT FROM AUTHOR]- Published
- 2011
- Full Text
- View/download PDF
15. Long-term no-tillage effects on particulate and mineral-associated soil organic matter under rainfed Mediterranean conditions.
- Author
-
Blanco‐Moure, N., Gracia, R., Bielsa, A. C., and López, M. V.
- Subjects
NO-tillage ,SOIL mineralogy ,HUMUS ,SOIL stabilization ,SOIL dynamics ,SOIL management - Abstract
Soil organic carbon ( SOC) plays an essential role in the sustainability of natural and agricultural systems. The identification of sensitive SOC fractions can be crucial for an understanding of SOC dynamics and stabilization. The objective of this study was to assess the effect of long-term no-tillage ( NT) on SOC content and its distribution between particulate organic matter ( POM) and mineral-associated organic matter (Min) fractions in five different cereal production areas of Aragon (north-east Spain). The study was conducted under on-farm conditions where pairs of adjacent fields under NT and conventional tillage ( CT) were compared. An undisturbed soil nearby under native vegetation (NAT) was included. The results indicate that SOC was significantly affected by tillage in the first 5 cm with the greatest concentrations found in NT (1.5-43% more than in CT). Below 40 cm, SOC under NT decreased (20-40%) to values similar or less than those under CT. However, the stratification ratio ( SR) never reached the threshold value of 2. The POM-C fraction, disproportionate to its small contribution to total SOC (10-30%), was greatly affected by soil management. The pronounced stratification in this fraction ( SR>2 in NT) and its usefulness for differentiating the study sites in terms of response to NT make POM-C a good indicator of changes in soil management under the study conditions. Results from this on-farm study indicate that NT can be recommended as an alternative strategy to increase organic carbon at the soil surface in the cereal production areas of Aragon and in other analogous areas. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
16. Transformation to state affine system and observer design.
- Author
-
Thoma, M., Nijmeijer, H., Fossen, T.I., Glumineau, A., and López-M., V.
- Abstract
A NSC for the transformation to the state affine systems of MISO nonlinear systems has been obtained. The main result is stated in terms of the I/O differential equation and some one-forms obtained in a straightforward way and easy to check. With the help of a regular transformation, one avoids the time varying computation of the observer gain matrice an then a Kalmanlike observer Σo (4.3) for the transformed system Σa (4.2) can be directly applied. [ABSTRACT FROM AUTHOR]
- Published
- 1999
- Full Text
- View/download PDF
17. TDR pressure cell for monitoring water content retention and bulk electrical conductivity curves in undisturbed soil samples.
- Author
-
Moret-Fernández, D., Vicente, J., Latorre, B., Lera, F., Castañeda, C., López, M. V., and Herrero, J.
- Subjects
STORM water retention basins ,CALIBRATION ,ELECTROLYTE solutions ,GYPSUM in soils ,SOIL permeability - Abstract
The water retention curve (θ(ψ)), which defines the relationship between soil volumetric water content (θ) and matric potential (ψ), is of paramount importance in characterizing the hydraulic behaviour of soils. However, few methods are so far available for estimating θ(ψ) in undisturbed soil samples. We present a new design of TDR-pressure cell (TDR-Cell) for estimating θ(ψ) in undisturbed soil samples. The TDR-Cell consists of a 50-mm-long and 50-mm internal diameter stainless steel cylinder (which constitutes the outer frame of a coaxial line) attached to a porous ceramic disc and closed at the ends with two aluminium lids. A 49-mm-long and 3-mm-diameter stainless steel rod, which runs longitudinally through the centre of the cylinder, constitutes the inner rod of a coaxial TDR probe. The TDR-Cell was used to determine the θ(ψ) curves of a packed sand and seven undisturbed soil samples from three profiles of agricultural soils. These θ(ψ) curves were subsequently compared to those obtained from the corresponding 2-mm sieved soils using the pressure plate method. Measurements of bulk electrical conductivity, σ
a , as a function of the water content, σa (θ), of the undisturbed soil samples were also performed. An excellent correlation ( R2 = 0·988) was found between the θ values measured by TDR on the different undisturbed soils and the corresponding θ obtained from the soil gravimetric water content. A typical bimodal θ(ψ) function was found for most of the undisturbed soil samples. Comparison between the θ(ψ) curves measured with the TDR-Cell and those obtained from the 2-mm sieved soils showed that the pressure plate method overestimates θ at low ψ values. The σa (θ) relationship was well described by a simple power expression ( R2 > 0·95), in which the power factor, defined as tortuosity, ranged between 1·18 and 3·75. Copyright © 2011 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]- Published
- 2012
- Full Text
- View/download PDF
18. Soil Aggregation and Soil Organic Carbon Stabilization: Effects of Management in Semiarid Mediterranean Agroecosystems.
- Author
-
Álvaro-Fuentes, J., Cantero-Martínez, C., López, M. V., Paustian, K., Denef, K., Stewart, C. E., and Arrúe, J. L.
- Subjects
SOIL management ,AGRICULTURE ,CROPPING systems ,CARBON in soils ,SOIL fertility ,SOIL structure ,ORGANIC compounds - Abstract
In semiarid agroecosystems of the Ebro valley (NE Spain) soils are characterized by tow soil organic matter (SOM) and a weak structure. In this study we investigated the individual and combined effect of tillage system (no-tillage, NT; reduced tillage, RT; conventional tillage, CT) and cropping system (barley-fallow rotation at the Peflaflor site, PN-BF and continuous barley at the Peñaflor site, PN-BB) on soil organic carbon (SOC) storage as well as the physical protection of SOM fractions by soil aggregates in three long-term experimental sites. In both cropping systems, total SOC content was more than 30% higher in NT compared with CT in the 0- to 5-cm depth. The suppression of fallowing in the PN-BB cropping system led to a greater SOC stabilization only in NT. In all the three sites, greater proportion of water-stable macroaggregates (>250 pm) was found under NT than under CT in the 0- to 5-cm depth. Macroaggregate organic C concentration (250-2000 pm) was greater in NT compared with CT in the BB cropping system, but did not differ with tillage treatment in the PN-BF rotation. Greater proportion of microaggregates within macroaggregates in NT compared with CT was only found in the Agramunt site (AG). However, greater C stabilized inside these microaggregates was observed in AG, Selvanera site (SV), and PN-BB in the 0- to 5-cm depth. The results of this study demonstrate that in the semiarid Mediterranean agroecosystems of the Ebro valley, the adoption of NT together with the suppression of long-fallowing period can significantly increase the amount of SOC stabilized in the soil surface and improve soil structure and aggregation. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF
19. Soil Bulk Electrical Conductivity Measurement using High-Dielectric Coated Time Domain Reflectometry Probes.
- Author
-
Moret-Fernández, D., Merino, R. I., Lera, F., López, M. V., and Arrúe, J. L.
- Subjects
REFLECTOMETER ,PERMITTIVITY ,SOIL permeability ,ELECTRIC conductivity ,SOIL absorption & adsorption ,ELECTRIC resistance - Abstract
Time domain reflectometiy (TDR) is a technique that allows simultaneous estimates of apparent permittivity (ϵ
a ) and hence volumetric water content (θ) and bulk electrical conductivity (σa ). Difficulties arise for θ and σa determination, however, when uncoated TDR probes (UP) are used in highly conductive media. This work shows that σa can be estimated in highly conductive media using a TDR probe coated with a high-dielectric insulator (CP). To this end, the Dalton method for σa estimations was applied to a 10-cm-long three-rod TDR probe insulated with a 0.2-mm-thick epoxy-ceramic composite coating with a relative permittivity, ϵr , of 32.3. This method was calibrated on different NaCl-water solutions (0-15 dS m-1 ) and compared with the standard long-time TDR method for σa estimations using an UP. The method was subsequently used for determining σa in four different soils with different values of θ and σa (0-6 dS m-1 ) and again compared with the standard TDR procedure. The low error (RMSE = 1.5) for the comparison between the ϵa measured with the CP and that calculated with the analytical solution for coaxial probes indicates that the CP is accurate enough for ϵa estimations. For σa values <4 dS m-1 , the UP allows determinations of ϵa and the most accurate estimations of σa using the standard TDR method (R2 = 0.99). For higher σa values, however, estimations of ϵa were only possible using the CP, where σa was satisfactorily determined (R2 = 0.99) using the Dalton method. To this end, a previous calibration between the real and the apparent bulk electrical conductivity estimated with the CP was required. [ABSTRACT FROM AUTHOR]- Published
- 2009
- Full Text
- View/download PDF
20. Tillage Effects on Soil Organic Carbon Fractions in Mediterranean Dryland Agroecosystems.
- Author
-
Álvaro-Fuentes, J., López, M. V., Cantero-Martinez, C., and Arrüe, J. L.
- Subjects
- *
TILLAGE , *CARBON in soils , *ARID regions agriculture , *AGRICULTURE , *SOIL quality , *SOIL productivity , *HUMUS , *SOIL science - Abstract
Under semiarid conditions, soil quality and productivity can be improved by enhancing soil organic matter content by means of alternative management practices. In this study, we evaluated the feasibility of no-till (NT) and cropping intensification as alternative soil practices to increase soil organic C (SOC). At the same time, we studied the influence of these management practices on two SOC fractions (particulate organic matter C, POM-C, and the mineral-associated C, Min-C), in semiarid agroecosystems of the Ebro River valley. Soil samples were collected from five soil layers (0-5-, 5-10-, 10-20-, 20-30-, 30-40-cm depth) during July 2005 at three long-term tillage experiments located at different sites in the Ebro River valley (northeast Spain). Soil bulk density, SOC concentration and content, SOC stratification ratio, POM-C, and Min-C were measured. Higher soil bulk density was observed under NT than under reduced tillage (RT), subsoil tillage (ST), or conventional tillage (CT). At the soil surface (0-5-cm depth), the highest total SOC concentration, POM-C, and Min-C were measured under NT, followed by RT, ST, and CT, respectively. In the whole soil profile (0-40 cm), similarly, slightly greater SOC content was measured under NT than under CT with the exception of the Selvanera site, where deep subsoil tillage combined with moldboard plowing accumulated more SOC than NT. In semiarid Mediterranean agro-ecosystems where CT consists in moldboard plowing, NT is a viable management practice to increase SOC. [ABSTRACT FROM AUTHOR]
- Published
- 2008
- Full Text
- View/download PDF
21. Management Effects on Soil Carbon Dioxide Fluxes under Semiarid Mediterranean Conditions.
- Author
-
Álvaro-Fuentes, J., López, M. V., Arrúe, J. L., and Cantero-Martínez, C.
- Subjects
- *
CARBON in soils , *SOIL management , *SOIL conservation , *NO-tillage , *TILLAGE , *SOILS & climate , *CROPPING systems , *ARID regions , *SOIL science - Abstract
Losses of soil organic carbon (SOC) have contributed to CO2 emissions from soils to the atmosphere and to global climate change. We hypothesized that in semiarid agroecosystems of the Mediterranean region, a shift from the traditional management system (including conventional tillage [CT] and a cereal-fallow rotation) to a more conservative system, including no-till (NT) and continuous cropping, could reduce CO2 emissions during the cropping season. Thus, in this study, we studied the effects of tillage and cropping systems on C inputs and soil CO2 fluxes during three cropping seasons at three different sites in the Ebro River valley (northeast Spain). Carbon inputs ranged from 650 to 6000 kg ha-1 and seasonal average CO2 flux ranged from 0.10 to 1.76 g CO2 m-2 h-1. Differences in rainfall led to marked differences in C inputs and soil fluxes among growing seasons. Although differences among tillage treatments were weak, CO2 fluxes under NT were always lower. Intensification of cropping systems led to an increase in C input. A move from CT to NT together with cropping intensification is suitable to increase C inputs and to reduce soil CO2 fluxes in semiarid Mediterranean agroecosystems. [ABSTRACT FROM AUTHOR]
- Published
- 2008
- Full Text
- View/download PDF
22. Indiana jones and ganser syndrome.
- Author
-
Pérez Fominaya, M., López, M. V., and Osca, A.
- Subjects
- *
DISSOCIATIVE disorders , *MINI-Mental State Examination , *SYNDROMES , *MUSICAL groups , *SYMPTOMS - Abstract
Introduction: Ganser syndrome is a rare medical disorder situated between hysterical etiopathogenesis and psychosis, factitious disorders and organic lesions which results in a difficult diagnosis. It is listed in DSM VI as a dissociative disorder whose main symptom is approximate answers, other accompanying symptoms appearing in Ganser: clouding of consciousness, somatic conversion symptoms and hallucinations. Psychopathologically explains a mental state of escape from a situation difficult to being tolerated. Organically appears in pathologies involving the frontal lobes Objectives: We present a case of a XX year old man who suddenly develops a depressive disorder with no apparent cause. Initially he was a professionally developed man. Famous archaeologist. University professor. Guitarist in a musical group. He deteriorated through the years, appearing dementia data with auditive hallucinations and resistant headache. He begins to have difficulty speaking correctly, with paraphasias and short answers, continually repeating "I don't know", Short-term amnesia and bed-chair life Methods: It was impossible to perform both the Mini-Mental State Examination test and the fototest because the patient refused claiming to be very nervous. The CT and MRI showed a slight temporary atrophy and vascular age changes. Subsequently, PET was performed without notable findings. Antidepressant and anxiolytic treatment was introduced without success as well as treatment for dementia and antipsychotic treatment. Results: The headache was improved. The rest of the symptoms did not disappear Conclusions: Ganser syndrome is a psychiatric condition that is difficult to diagnose and treat. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
23. Measurement of Soil Bulk Electrical Conductivity Using Partially Coated TDR Probes.
- Author
-
Moret-Fernández, D., Lera, F., Arrúe, J. L., and López, M. V.
- Subjects
PERMITTIVITY ,ELECTRIC conductivity ,ATTENUATION (Physics) ,WAVE analysis ,SOIL physics - Abstract
The time domain reflectometry (TDR) technique allows simultaneous estimation of apparent permittivity (ε
a ) and bulk electrical conductivity (δa ). In highly conductive media, however, the signal is completely attenuated, which precludes permittivity measurements. This study showed that δa can be estimated in conductive media by applying long-time TDR waveform analysis to a TDR probe partially insulated with a high-dielectric coating. Four 10-cm-long three-rod TDR probes with identical geometry but different percentages of rod coating were tested: an uncoated sensor (P0 ) and probes with 50% (P50 ), 75% (P75 ), and 95% (P95 ) of the rod length coated with an insulator with a relative permittivity (εr ) of 32.3. A good relationship (r² = 0.99) was found between the εa estimated, if possible, with P0 immersed in several conductive and nonconductive media and the corresponding values estimated with P50 , P75 , and P95 The results also show that, for δa values ranging between 0.4 and 0.75 S m-1 , simultaneous measurements of εa and δa were only possible using the partially coated probes. A good correlation was found between the δa estimated with P0 inserted in different soil columns wetted with highly saline solutions (i.e., δa > 0.2 S m-1 ) and those values estimated with P50 , P75 , and P95 (r² = 0.96, RMSE = 1.08, and SD = 0.38). For δa < 0.2 S m-1 , the accuracy of the partially coated TDR probes for estimations of δa decreased as the percentage of the rod coating increased, with errors up to 292% when δa determined by P95 was compared with that estimated by P0 . [ABSTRACT FROM AUTHOR]- Published
- 2009
- Full Text
- View/download PDF
24. An evaluation of wind erosion hazard in fallow lands of semiarid Aragon (NE Spain).
- Author
-
López, M. V., Gracia, R., and Arrúe, J. L.
- Subjects
- *
RISK , *WIND erosion , *FALLOW lands , *CALCIUM in soils , *ARID regions agriculture - Abstract
Long fallowing (16 to 17 months), in the cereal/fallow rotation, may favor soil losses by wind erosion in agricultural soils of semiarid Aragon (NE Spain). With the objective of evaluating the risk of wind erosion in this area, soil losses for the most critical period of fallow (February-April) were estimated from a total of 67 fallow fields by using the Wind Erosion Equation (WEQ). All soils were medium textured, with this loam the most frequent textural class (45%). The CaCO3 content in the soil was higher than 200 g kg-1 in 90% of the fields. Mouldboard plough, chisel plough, and disk harrow were the main primary tillage tools used by farmers during fallow. Soil cover by crop residues was negligible (< 1%) in 76% of the fields, and only 20% tilling was done perpendicularly to dominant wind direction. The highest erodibility values corresponded to soils with a sandy loam texture and traditionally tilled with mouldboard plough. Predicted wind erosion was high to very high in 30% of the fields (> 20 Mg ha-1). The WEQ estimated erosion reductions to tolerable levels if reduced tillage, with chiseling as the primary tillage, is adequately adopted in the dryland cereal production areas of semiarid Aragon. [ABSTRACT FROM AUTHOR]
- Published
- 2001
25. Impact of Staphylococcus aureus phenotype and genotype on the clinical characteristics and outcome of infective endocarditis. A multicentre, longitudinal, prospective, observational study.
- Author
-
Fernández-Hidalgo N, Ribera A, Larrosa MN, Viedma E, Origüen J, de Alarcón A, Fariñas MC, Sáez C, Peña C, Múñez E, García López MV, Gavaldà J, Pérez-Montarelo D, Chaves F, and Almirante B
- Subjects
- Aged, Aged, 80 and over, Endocarditis, Bacterial mortality, Female, Genotype, Hospital Mortality, Humans, Longitudinal Studies, Male, Middle Aged, Phenotype, Prognosis, Prospective Studies, Risk Factors, Spain, Staphylococcal Infections microbiology, Endocarditis, Bacterial microbiology, Staphylococcal Infections mortality, Staphylococcus aureus drug effects, Staphylococcus aureus genetics, Vancomycin pharmacology
- Abstract
Objective: We aimed to evaluate the impact of Staphylococcus aureus phenotype (vancomycin MIC) and genotype (agr group, clonal complex CC) on the prognosis and clinical characteristics of infective endocarditis (IE)., Methods: We performed a multicentre, longitudinal, prospective, observational study (June 2013 to March 2016) in 15 Spanish hospitals. Two hundred and thirteen consecutive adults (≥18 years) with a definite diagnosis of S. aureus IE were included. Primary outcome was death during hospital stay. Main secondary end points were persistent bacteraemia, sepsis/septic shock, peripheral embolism and osteoarticular involvement., Results: Overall in-hospital mortality was 37% (n = 72). Independent risk factors for death were age-adjusted Charlson co-morbidity index (OR 1.20; 95% CI 1.08-1.34), congestive heart failure (OR 3.60; 95% CI 1.72-7.50), symptomatic central nervous system complication (OR 3.17; 95% CI 1.41-7.11) and severe sepsis/septic shock (OR 4.41; 95% CI 2.18-8.96). In the subgroup of methicillin-susceptible S. aureus IE (n = 173), independent risk factors for death were the age-adjusted Charlson co-morbidity index (OR 1.17; 95% CI 1.03-1.31), congestive heart failure (OR 3.39; 95% CI 1.51-7.64), new conduction abnormality (OR 4.42; 95% CI 1.27-15.34), severe sepsis/septic shock (OR 5.76; 95% CI 2.57-12.89) and agr group III (OR 0.27; 0.10-0.75). Vancomycin MIC ≥1.5 mg/L was not independently associated with death during hospital nor was it related to secondary end points. No other genotype variables were independently associated with in-hospital death., Conclusions: This is the first prospective study to assess the impact of S. aureus phenotype and genotype. Phenotype and genotype provided no additional predictive value beyond conventional clinical characteristics. No evidence was found to justify therapeutic decisions based on vancomycin MIC for either methicillin-resistant or methicillin-susceptible S. aureus., (Copyright © 2017 European Society of Clinical Microbiology and Infectious Diseases. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2018
- Full Text
- View/download PDF
26. Endocarditis caused by anaerobic bacteria.
- Author
-
Kestler M, Muñoz P, Marín M, Goenaga MA, Idígoras Viedma P, de Alarcón A, Lepe JA, Sousa Regueiro D, Bravo-Ferrer JM, Pajarón M, Costas C, García-López MV, Hidalgo-Tenorio C, Moreno M, and Bouza E
- Subjects
- Aged, Female, Humans, Incidence, Male, Middle Aged, Prevalence, Prospective Studies, Spain epidemiology, Bacteria, Anaerobic classification, Bacteria, Anaerobic isolation & purification, Endocarditis, Bacterial epidemiology, Endocarditis, Bacterial microbiology, Prosthesis-Related Infections epidemiology, Prosthesis-Related Infections microbiology
- Abstract
Background: Infective endocarditis (IE) caused by anaerobic bacteria is a rare and poorly characterized disease. Most data reported in the literature are from case reports [1-3]. Therefore, we assessed the situation of anaerobic IE (AIE) in Spain using the database of the Spanish Collaboration on Endocarditis (GAMES)., Methods: We performed a prospective study from 2008 to 2016 in 26 Spanish centers. We included 2491 consecutive cases of definite IE (Duke criteria)., Results: Anaerobic bacteria caused 22 cases (0.9%) of definite IE. Median age was 66 years (IQR, 56-73), and 19 (86.4%) patients were men. Most patients (14 [63.6%]) had prosthetic valve IE and all episodes were left-sided: aortic valves, 12 (54.5%); and mitral valves, 8 (36.4%). The most common pathogens were Propionibacterium acnes (14 [63.6%]), Lactobacillus spp (3 [13.63%]), and Clostridium spp. (2 [9.0%]), and the infection was mainly odontogenic. Fifteen of the 22 patients (68.2%) underwent cardiac surgery. Mortality was 18.2% during admission and 5.5% after 1 year of follow-up. When patients with AIE were compared with the rest of the cohort, we found that although those with AIE had a similar age and Charlson comorbidity index, they were more likely to have community-acquired IE (86.4% vs. 60.9%, p = 0.01), have undergone cardiac surgery (68.2% vs 48.7% p = 0.06), and have had lower mortality rates during admission (18.2% vs. 27.3%)., Conclusion: IE due to anaerobic bacteria is an uncommon disease that affects mainly prosthetic valves and frequently requires surgery. Otherwise, there are no major differences between AIE and IE caused by other microorganisms., (Copyright © 2017 Elsevier Ltd. All rights reserved.)
- Published
- 2017
- Full Text
- View/download PDF
27. ANALYSIS OF THE PROBLEM OF PSYCHOTHERAPY OF MENTAL HEALTH AND ADMINISTRATION IN THE AREA OF BIOETHICS.
- Author
-
Mendoza O M, M-H FC, López M V, and Flores Merino MV
- Abstract
This research refers to the case study of a patient, a male college student, who was given psychotherapeutic care. Initially, the patient self-referral to the Mental Health area, which is a service permanently offered by the Autonomous University of the State of Mexico, through the Research Center in Medical Sciences (CICMED). The process of the case allowed analyzing the administrative procedure that operates in the CICMED and the process between this and the educational establishment in which the patient studied.
- Published
- 2016
28. Streptococcus agalactiae left-sided infective endocarditis. Analysis of 27 cases from a multicentric cohort.
- Author
-
Ivanova Georgieva R, García López MV, Ruiz-Morales J, Martínez-Marcos FJ, Lomas JM, Plata A, Noureddine M, Hidalgo-Tenorio C, Reguera JM, De la Torre Lima J, Gálvez Aceval J, Márquez M, and de Alarcón A
- Subjects
- Aged, Cohort Studies, Endocarditis microbiology, Endocarditis mortality, Endocarditis pathology, Female, Humans, Male, Middle Aged, Prognosis, Risk Factors, Spain, Streptococcal Infections microbiology, Streptococcal Infections pathology, Streptococcus agalactiae pathogenicity, Endocarditis epidemiology, Streptococcal Infections epidemiology, Streptococcus agalactiae isolation & purification
- Abstract
Summary Objective: To evaluate the current trends in the clinical characteristics and the prognosis of Streptococcus agalactiae infective endocarditis (IE), uncommon disease associated with high mortality., Methods: Descriptive analysis of 27 cases of a large cohort (961 episodes) of infective endocarditis collected in seven hospitals of Andalusia (Spain) between 1984 and 2008., Results: Native valves were affected in most cases (85. 2%), multiple valves were frequently involved (22.2%). The median age of the patients was 65 (51-76) years (59.3% men), with a comorbidity, according to the Charlson index, of 2.6+/-2.3. The most frequent underlying diseases were diabetes mellitus (25.9%), chronic obstructive pulmonary disease (14.8%), neoplasms (14.8%), urological disorders (11%) and chronic liver disease (11%). Clinical presentation was characterized by rapid worsening (median of 9 (5.7-15) days from onset of symptoms until diagnosis), a high rate of embolisms (37%) and cardiac complications (abscesses, fistulas or valve rupture) - 37% of cases. Surgery was performed in 12 patients (44.4%) and a high mortality (40.7%) was observed., Conclusion: S. agalactiae IE is a serious disease with aggressive course and high mortality rate and affects patients with debilitating diseases. We must be alert of the development of complications and consider early valve surgery when it is necessary., (Copyright (c) 2010 The British Infection Society. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2010
- Full Text
- View/download PDF
29. Sex differences in mortality in patients with COPD.
- Author
-
de Torres JP, Cote CG, López MV, Casanova C, Díaz O, Marin JM, Pinto-Plata V, de Oca MM, Nekach H, Dordelly LJ, Aguirre-Jaime A, and Celli BR
- Subjects
- Aged, Body Mass Index, Exercise Tolerance, Female, Forced Expiratory Volume, Humans, Male, Middle Aged, Multivariate Analysis, Prognosis, Pulmonary Disease, Chronic Obstructive epidemiology, Sex Factors, Nicotiana adverse effects, Treatment Outcome, Pulmonary Disease, Chronic Obstructive diagnosis, Pulmonary Disease, Chronic Obstructive mortality
- Abstract
Little is known about survival and clinical prognostic factors in females with chronic obstructive pulmonary disease (COPD). The aim of the present study was to determine the survival difference between males and females with COPD and to compare the value of the different prognostic factors for the disease. In total, 265 females and 272 males with COPD matched at baseline by BODE (body mass index, airflow obstruction, dyspnoea, exercise capacity) and American Thoracic Society/European Respiratory Society/Global Initiative of Chronic Obstructive Lung Disease criteria were prospectively followed. Demographics, lung function, St George's Respiratory Questionnaire, BODE index, the components of the BODE index and comorbidity were determined. Survival was documented and sex differences were determined using Kaplan-Meier analysis. The strength of the association of the studied variables with mortality was determined using multivariate and receiver operating curves analysis. All-cause (40 versus 18%) and respiratory mortality (24 versus 10%) were higher in males than females. Multivariate analysis identified the BODE index in females and the BODE index and Charlson comorbidity score in males as the best predictors of mortality. The area under the curve of the BODE index was a better predictor of mortality than the forced expiratory volume in one second for both sexes. At similar chronic obstructive pulmonary disease severity by BODE index and forced expiratory volume in one second, females have significantly better survival than males. For both sexes the BODE index is a better predictor of survival than the forced expiratory volume in one second.
- Published
- 2009
- Full Text
- View/download PDF
30. Laryngeal effects of stimulation of rostral and ventral pons in the anaesthetized rat.
- Author
-
Lara JP, Dawid-Milner MS, López MV, Montes C, Spyer KM, and González-Barón S
- Subjects
- Action Potentials drug effects, Animals, Antihypertensive Agents pharmacology, Cardiovascular Physiological Phenomena drug effects, Electric Stimulation, Glutamic Acid metabolism, Glutamic Acid pharmacology, Guanethidine pharmacology, Laryngeal Muscles drug effects, Nerve Net cytology, Nerve Net drug effects, Nerve Net physiology, Neural Pathways drug effects, Neural Pathways physiology, Phrenic Nerve drug effects, Phrenic Nerve physiology, Pons cytology, Pons drug effects, Rats, Rats, Sprague-Dawley, Respiratory Center cytology, Respiratory Center drug effects, Sympathetic Nervous System cytology, Sympathetic Nervous System drug effects, Synaptic Transmission drug effects, Synaptic Transmission physiology, Action Potentials physiology, Laryngeal Muscles innervation, Laryngeal Muscles physiology, Pons physiology, Respiratory Center physiology, Respiratory Physiological Phenomena drug effects, Sympathetic Nervous System physiology
- Abstract
In order to study the importance of two pontine regions modulating laryngeal resistance, electrical current or microinjections of glutamate (10-30 nl, 1-3 nmol) were made into the pontine parabrachial complex and the A5 region in spontaneously breathing anaesthetized rats. Two distinct patterns of laryngeal and respiratory responses were elicited. An increase of subglottal pressure was accompanied with an expiratory facilitatory response consisted of a decrease in both respiratory rate and phrenic nerve activity. A decrease of subglottal pressure was accompanied with an inspiratory facilitatory response consisted of an increase in both respiratory rate and phrenic nerve activity. The modification of laryngeal calibre occurred during both respiratory phases in most cases. The concomitant cardiovascular changes of these responses were also analyzed. Controls using guanethidine to block autonomic responses which might interact with respiratory control were also made. Histological analysis of stimulation sites showed a topographical organization of these responses: laryngeal constriction was evoked from Kölliker-Fuse, medial parabrachial nuclei and A5 region, whilst the laryngeal dilation was evoked from the lateral parabrachial nucleus.
- Published
- 2002
- Full Text
- View/download PDF
31. The diversity of rhizobia nodulating beans in Northwest Argentina as a source of more efficient inoculant strains.
- Author
-
Aguilar OM, López MV, and Riccillo PM
- Subjects
- Argentina, Bacterial Proteins, N-Acetylglucosaminyltransferases genetics, Oxidoreductases genetics, Phylogeny, RNA, Ribosomal, 16S, Genetic Variation, Phaseolus microbiology, Rhizobiaceae physiology
- Abstract
The common bean (Phaseolus vulgaris L.) is cultivated widely in Central and South America and particularly in the Northwest of Argentina. In order to describe the diversity of the common bean nodulating rhizobial population from the bean producing area in Northwest Argentina (NWA), a collection of about 400 isolates of common beans recovered from nodules and soil samples from NWA were characterized by using nifH-PCR, analysis of genes coding for 16S rRNA and nodC, and REP-fingerprinting, respectively. It was found that species Rhizobium etli is predominant in common bean nodules although a high degree of diversity was found within the species. Other bean nodulating genotypes recovered from soils by using Leucaena sp. as the trapping host was found to have the 16S rDNA alleles of species such as Sinorhizobium fredii, Sinorhizobium saheli, Sinorhizobium teranga, Mesorhizobium loti, and Rhizobium tropici. Some of the bean genotypes that were found to be more efficient in green house experiments were selected and assayed in two successive bean-cropping seasons in the field environment in NWA, and an increase in yields with inoculation was found. The performance of strains isolated from the region indicates potential for exploiting the diversity.
- Published
- 2001
- Full Text
- View/download PDF
32. Alcohol intake and severity of injuries on highways in Mexico: a comparative analysis.
- Author
-
Híjar M, Flores M, López MV, and Rosovsky H
- Subjects
- Adult, Aged, Alcohol Drinking adverse effects, Cross-Sectional Studies, Female, Humans, Male, Mexico epidemiology, Middle Aged, Risk Factors, Accidents, Traffic statistics & numerical data, Alcohol Drinking epidemiology, Automobile Driving statistics & numerical data, Trauma Severity Indices, Wounds and Injuries epidemiology
- Abstract
Aims: To analyze the association between alcohol intake and the severity of injuries sustained from traffic accidents on a Mexican highway., Design: An observational unit evaluated drivers involved in auto accidents., Setting: Mexico-Cuernavaca Highway, Mexico. A 60 km-long road with many altitude variations and sharp curves., Participants: Three hundred and eighty-six drivers involved in traffic accidents between March and September, 1994., Measurements: A questionnaire was applied to the driver, an occupant or witness at the site of the accident to collect information about the driver, vehicle characteristics, type of accident, day-night occurrence, road section (Mexico-Cuernavaca or Cuernavaca-Mexico) and weather conditions. A physical examination was carried out to determine the presence and severity of injuries., Findings: There were 177 injured people, including 12 deaths, with rates of 67.5 injuries and 4.58 deaths per 10,000 km driven. Variables associated with alcohol intake (p < 0.05) included: severity of injuries, non-use of seat belt, vehicle size and occurrence at night. Risk factors for severe injuries were: alcohol intake (adjusted OR 6.1 CI 95% 1.6-24.0); non-use of seat belt (OR 4.9 CI 2.2-10.8), age < 25 years (OR 3.6 CI 1.0-12.7), age > 54 years (OR 6.0 CI 1.4-25.0), speed > 90 km/h (OR 2.6 CI 1.1-6.3) and occurrence at night (OR 2.6 CI 1.3-5.3)., Conclusions: Alcohol intake is a major risk factor for severe injuries from highway traffic accidents. Its association with other risk factors such as non-use of seat belt and excessive speed suggests the importance of designing interventions aimed at reducing alcohol intake among automobile drivers.
- Published
- 1998
- Full Text
- View/download PDF
33. Prevalence of the Rhizobium etli-like allele in genes coding for 16S rRNA among the indigenous rhizobial populations found associated with wild beans from the Southern Andes in Argentina.
- Author
-
Aguilar OM, López MV, Riccillo PM, González RA, Pagano M, Grasso DH, Pühler A, and Favelukes G
- Subjects
- Argentina, Base Sequence, DNA Fingerprinting, DNA, Ribosomal analysis, Genes, Bacterial, Molecular Sequence Data, Nitrogenase genetics, Phylogeny, Plasmids genetics, Symbiosis, Alleles, Fabaceae microbiology, Genes, rRNA, Oxidoreductases, Plants, Medicinal, RNA, Ribosomal, 16S genetics, Rhizobium genetics
- Abstract
A collection of rhizobial isolates from nodules of wild beans, Phaseolus vulgaris var. aborigineus, found growing in virgin lands in 17 geographically separate sites in northwest Argentina was characterized on the basis of host range, growth, hybridization to a nifH probe, analysis of genes coding for 16S rRNA (16S rDNA), DNA fingerprinting, and plasmid profiles. Nodules in field-collected wild bean plants were largely dominated by rhizobia carrying the 16S rDNA allele of Rhizobium etli. A similar prevalence of the R. etli allele was observed among rhizobia trapped from nearby soil. Intragroup diversity of wild bean isolates with either R. etli-like or Rhizobium leguminosarum bv. phaseoli-like alleles was generally found across northwest Argentina. The predominance of the R. etli allele suggests that in this center of origin of P. vulgaris the coevolution of Rhizobium spp. and primitive beans has resulted in this preferential symbiotic association.
- Published
- 1998
- Full Text
- View/download PDF
34. Multicystic dysplastic kidney: absence of complications in patients treated conservatively.
- Author
-
Orejas G, Málaga S, Santos F, Rey C, López MV, and Merten A
- Subjects
- Female, Follow-Up Studies, Humans, Infant, Newborn, Kidney Diseases, Cystic congenital, Kidney Diseases, Cystic epidemiology, Male, Polycystic Kidney, Autosomal Recessive, Prospective Studies, Time Factors, Urinary Tract Infections etiology, Kidney abnormalities, Kidney Diseases, Cystic therapy
- Abstract
The optimal treatment, surgical or conservative, for multicystic dysplastic kidney (MDK) is still undetermined. We analyzed prospectively the evolution of 12 children with MDK who were managed conservatively. After a mean follow-up of 32 months, the only complication found was an episode of urinary tract infection in 3 patients. Complete involution of MDK was observed in 9 patients (75%), the mean period for sonographical disappearance being 16 months. Infants with MDK should be closely monitored and nephrectomy performed when MDK compresses neighbor organs or hypertension develops. There is no agreement on the best therapeutic approach in patients in whom MDK involution has not occurred after a prudential waiting time still not determined.
- Published
- 1992
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.