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1.
Article in English | MEDLINE | ID: mdl-37898359

ABSTRACT

OBJECTIVE: To assess differences in the five year abdominal aortic aneurysm (AAA) sac regression rate after endovascular aneurysm repair (EVAR) in patients with and without diabetes mellitus (DM). METHODS: An international prospective registry (Europe, USA, Brazil, Australia, and New Zealand) of patients treated with the GORE EXCLUDER endograft. All scheduled EVARs for infrarenal AAA between 2014 and 2016 with complete five year imaging follow up were included. Emergency procedures, ancillary proximal procedures, and inflammatory and infectious aetiologies were excluded. Descriptive and inferential statistics, and Cox proportional hazards survival models were used. A control group of patients without DM with similar age and comorbidities was selected using propensity scores, matched in a 1:2 scheme. RESULTS: A total of 2 888 patients (86.1% male; mean age 73.5 ± 8 years) was included, of whom 545 (18.9%) had DM. Patients with DM had higher rates of hypertension (89.2% vs. 78.4%), dyslipidaemia (76.0% vs. 60.7%), coronary artery disease (52.3% vs. 37.9%), and chronic renal impairment (20.9% vs. 14.0%) (all p < .001). The mean pre-procedural AAA diameter was 58.1 ± 10 mm. Five years post-EVAR, the type 1A endoleak rate was 1.1% (0.6% DM vs. 1.2% non-DM), the endograft related re-intervention rate was 7.3% (6.2% vs. 7.6%), the major adverse cardiovascular event (MACE) rate was 1.4% (1.1% vs. 1.5%), and aortic related mortality rate was 1.0% (0.6% vs. 1.2%), without statistically significant differences between groups. The overall five year mortality rate was higher in diabetics (36.3% vs. 30.5%; hazard ratio [HR] 1.30, 95% confidence interval [CI] 1.07 - 1.58; p = .001). No statistically significant differences were found in sac regression rate (≥ 5 mm) between diabetics and non-diabetics 70.0% vs. 73.1%; HR 0.88, 95% CI 0.75-1.04; p = .131. These differences remained statistically non-significant after excluding patients performed out of instructions for use (p = .61) and patients with types 1, 2 or 3 endoleaks (p = .39). CONCLUSION: The paradoxical relationship between DM and AAA does not appear to result in differences in post-EVAR sac regression rates. However, even when controlling for other comorbidities, patients with DM undergoing EVAR may have a higher five year mortality rate.

2.
Braz J Biol ; 84: e248411, 2022.
Article in English | MEDLINE | ID: mdl-35544785

ABSTRACT

The dopamine content in cerebral structures has been related to neuronal excitability and several approaches have been used to study this phenomenon during seizure vulnerability period. In the present work, we describe the effects of dopamine depletion after the administration of 6-hidroxidopamine (6-OHDA) into the substantia nigra pars compacta of male rats submitted to the pilocarpine model of epilepsy. Susceptibility to pilocarpine-induced status epilepticus (SE), as well as spontaneous and recurrent seizures (SRSs) frequency during the chronic period of the model were determined. Since the hippocampus is one of main structures in the development of this experimental model of epilepsy, the dopamine levels in this region were also determined after drug administration. In the first experiment, 62% (15/24) of 6-OHDA pre-treated rats and 45% (11/24) of those receiving ascorbic acid as control solution progressed to motor limbic seizures evolving to SE, after the administration of pilocarpine. Severeness of seizures during the model´s the acute period, was significantly higher in epileptic experimental rats (56.52%), than in controls (4.16%). In the second experiment, the frequency of seizures in the model's chronic phase did not significantly change between groups. Our data show that dopamine may play an important role on seizure severity in the pilo's model acute period, which seems to be due to dopamine inhibitory action on motor expression of seizure.


Subject(s)
Epilepsy , Status Epilepticus , Animals , Dopamine/adverse effects , Epilepsy/chemically induced , Male , Muscarinic Agonists/adverse effects , Oxidopamine/adverse effects , Pilocarpine/toxicity , Rats , Rats, Wistar , Seizures/chemically induced , Seizures/metabolism , Status Epilepticus/chemically induced
3.
Rev Med Virol ; 32(4): e2358, 2022 07.
Article in English | MEDLINE | ID: mdl-35445774

ABSTRACT

SARS-CoV-2 virus has infected nearly 300 M people worldwide and has been associated with over 6 M deaths by March 2022. Since the virus emergence in December 2019 in Wuhan, several new mutations have been described. The World Health Organization has developed a working name for these emerging variants according to their impact on the worldwide population. In this context a high alert has been paid to variants of concern (VOC) due to their high infectiousness and transmissibility patterns. The most recent VOC, Omicron (B.1.1.529), has become dominant in the shortest time ever and has placed Europe under an overwhelming and unprecedented number of new cases. This variant has numerous mutations in regions that are associated with higher transmissibility, stronger viral binding, affinity and antibody escape. Moreover, the mutations and deletions present in the spike protein suggest that the SARS-CoV-2 specific attachment inhibitors may not be the best option for Omicron therapy. Omicron is the dominant variant circulating worldwide and, at the end of February 2022, it was responsible for nearly all sequences reported to GISAID. Omicron is made up of several sublineages, where the most common are BA.1 and BA.2 (or Nextstrain clade 21K and 21L, respectively). At a global level, it is possible to say that the proportion of BA.2 has been increasing relative to BA.1 and in some countries it has been replacing it at high rates. In order to better assess the Omicron effectiveness on antibody escape, spread and infectious ability it is of the highest relevance to maintain a worldwide tight surveillance. Even though this variant has been associated with a lower death rate, it is important to highlight that the number of people becoming infected is concerning and that further unpredictable mutations may emerge as the number of infected people rises.


Subject(s)
COVID-19 , SARS-CoV-2 , COVID-19/epidemiology , Europe/epidemiology , Humans , Mutation , SARS-CoV-2/genetics , World Health Organization
4.
Rev Mal Respir ; 39(2): 152-169, 2022 Feb.
Article in French | MEDLINE | ID: mdl-35144843

ABSTRACT

INTRODUCTION: Therapeutic patient education (TPE) is an essential component of pulmonary readaptation in chronic respiratory diseases. Numerous and varied patient education projects offer heterogeneous contents and methods, which render them difficult to analyze and to compare. The objective of this review was to provide perspective on the main principles of patient education, using a non-exhaustive approach. STATE OF KNOWLEDGE: This review is focused on patient education using a patient-centered approach, physician-patient partnership and self-management, which are presented at once pragmatically and conceptually. One of the main objectives of TPE is the acquisition of self-management skills by patients with a chronic disease, which will be considered from a clinical standpoint. Lastly, TPE will be assessed in the overall framework of patient-centered pulmonary readaptation. PERSPECTIVES: TPE needs to be structured in view of assessing its effects. It is consequently essential for caregivers to receive continuous training so as to more clearly understand the methods employed, the objective being to build evaluable contents contributing to performance of multicentric trials. CONCLUSION: Current literature on TPE emphasizes the extent to which the patient remains the central actor in his or her care pathway. If patients are called upon to modify their behaviors, it is equally necessary that caregivers proceed likewise, adopting postures favoring the acquisition and appropriation by the patient of skills that shall be required as he or she learns to live with chronic disease.


Subject(s)
Caregivers , Patient Education as Topic , Chronic Disease , Female , Humans , Male
5.
Pharmaceuticals (Basel) ; 14(9)2021 Sep 10.
Article in English | MEDLINE | ID: mdl-34577613

ABSTRACT

Metabolic syndrome (MetS) is a complex disease that affects almost a quarter of the world's adult population. In MetS, diabetes, obesity, hyperglycemia, high cholesterol, and high blood pressure are the most common disorders. Polypharmacy is the most used strategy for managing conditions related to MetS, but it has drawbacks such as low medication adherence. Multitarget ligands have been proposed as an interesting approach to developing drugs to treat complex diseases. However, suitable preclinical models that allow their evaluation in a context closer to a clinical situation of a complex disease are needed. From molecular docking studies, compound 1b, a 5-aminoanthranilic acid derivative substituted with 4'-trifluoromethylbenzylamino and 3',4'-dimethoxybenzamide moieties, was identified as a potential multitarget drug, as it showed high in silico affinity against targets related to MetS, including PPAR-α, PPAR-γ, and HMG-CoA reductase. It was evaluated in a diet-induced MetS rat model and simultaneously lowered blood pressure, glucose, total cholesterol, and triglyceride levels after a 14-day treatment. No toxicity events were observed during an acute lethal dose evaluation test at 1500 mg/kg. Hence, the diet-induced MetS model is suitable for evaluating treatments for MetS, and compound 1b is an attractive starting point for developing multitarget drugs.

6.
Oecologia ; 196(4): 951-961, 2021 Aug.
Article in English | MEDLINE | ID: mdl-33885980

ABSTRACT

Fire-suppression is of concern in fire-prone ecosystems because it can result in the loss of endemic species. Suppressing fires also causes a build-up of flammable biomass, increasing the risk of severe fires. Using a Before-After, Control-Impacted design, we assessed the consequences of high-severity fires on Neotropical savanna arboreal ant communities. Over a 9-year period, we sampled the ant fauna of the same trees before and after two severe fires that hit a savanna reserve in Brazil and the trees from an unburned savanna site that served as a temporal control. The ant community associated with the unburned trees was relatively stable, with no significant temporal variation in species richness and only a few species changing in abundance over time. In contrast, we found a strong decline in species richness and marked changes in species composition in the burned trees, with some species becoming more prevalent and many becoming rare or locally extinct. The dissimilarity in species richness and composition was significantly smaller between the two pre-fire surveys than between the pre- and post-fire surveys. Fire-induced changes were much more marked among species with strictly arboreal nesting habits, and therefore more susceptible to the direct effects of fire. The decline of some of the ecologically dominant arboreal ant species may be particularly important, as it opens substantial ecological space for cascading community-wide changes. In particular, severe fires appear to disrupt the typical vertical stratification between the arboreal and ground-dwelling faunas, which might lead to homogenization of the overall ant community.


Subject(s)
Ants , Fires , Animals , Ecosystem , Grassland , Trees
7.
Rev Mal Respir ; 38(6): 646-663, 2021 Jun.
Article in French | MEDLINE | ID: mdl-33895033

ABSTRACT

Chronic respiratory disease is a major cause of morbidity and mortality worldwide and an important cause of disability including a reduction of exercise, functional and muscle capacity contributing to a decreased quality of life. In the context of pulmonary rehabilitation, a thorough patient-centered outcome assessment, including not only measures of lung function, but also exercise functional and muscle capacity, is imperative for a comprehensive disease management. Assessment of these impairments and dysfunctions with appropriate and change-sensitive procedures is thus necessary for personalizing the physical interventions and assessing the short- and long-term effectiveness of the intervention. The clinician currently has a wide variety of tests and measurements available to assess the physical and functional capacity of people with chronic respiratory disease. The aim of this review is to provide a pragmatic synthesis of the physical, functional and muscle capacity tests most commonly used in pulmonary rehabilitation. Ultimately, it should help the clinician to identify the relevant evaluations according to the objectives of the patients but also according to the available resources, the setting of pulmonary rehabilitation and the specific qualities of each test.


Subject(s)
Pulmonary Disease, Chronic Obstructive , Quality of Life , Exercise , Exercise Tolerance , Humans , Pulmonary Disease, Chronic Obstructive/diagnosis
9.
Medisur ; 18(5): 919-923, sept.-oct. 2020. graf
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1143298

ABSTRACT

RESUMEN En los hemangiomas de la infancia de tipo segmentario son frecuentes las complicaciones, por lo que es necesario el tratamiento de estas lesiones. El propranolol es en la actualidad la primera línea de tratamiento en estos casos. Se reporta el caso de una lactante de un mes de edad con hemangioma segmentario de la cara, diagnosticada y tratada en el Hospital Pediátrico de Cienfuegos. Se le administra propranolol y demostró regresión casi completa de la lesión, se mantuvo el tratamiento por un año y no presentó ninguna complicación con su uso.


ABSTRACT Complications are frequent in childhood segmental hemangiomas, so treatment of these lesions is necessary.Propranolol is currently the first line treatment in these cases. The case of a one-month-old infant with a segmental hemangioma of the face, diagnosed and treated at the Pediatric Hospital of Cienfuegos, is reported. He was given propranolol and showed almost complete lesion regression, maintaining the treatment for one year and any complication occurred.

10.
Eur J Vasc Endovasc Surg ; 60(6): 837-842, 2020 Dec.
Article in English | MEDLINE | ID: mdl-32912764

ABSTRACT

OBJECTIVE: The International Commission on Radiological Protection (ICRP) has highlighted the large number of medical specialties using fluoroscopy outside imaging departments without programmes of radiation protection (RP) for patients and staff. Vascular surgery is one of these specialties and endovascular aneurysm repair (EVAR) is one of the most challenging procedures requiring RP guidance and optimisation actions. The recent European Directive on Basic Safety Standards requires the use and regular update of diagnostic reference levels (DRL) for interventional procedures. The objective of the study was to know the doses of patients undergoing EVAR with mobile Xray systems and with hybrid rooms (fixed Xray systems), to obtain national DRLs and suggest optimisation actions. METHODS: The Spanish Chapter of Endovascular Surgery launched a national survey that involved hospitals for 10 autonomous communities representing the 77% of the Spanish population (46.7 million inhabitants). Patient dose values from mobile Xray systems were available from nine hospitals (sample of 165 EVAR procedures) and data from hybrid rooms, from seven hospitals, with dosimetric data from 123 procedures. The initial national DRLs have been obtained, as the third quartile of the median values from the different centres involved in the survey. RESULTS: The proposed national DRLs are 278 Gy cm2 for hybrid rooms and 87 Gy cm2 for mobile Xray systems, and for cumulative air kerma (cumulative AK) at the patient entrance reference point, 1403 mGy for hybrid rooms, and 292 mGy for mobile systems. CONCLUSION: An audit of patient doses for EVAR procedures to identify optimised imaging protocol strategies is needed. It is also appropriate to evaluate the diagnostic information required for EVAR procedures. The increase by a factor of 3.2 (for kerma area product) and 4.8 (for cumulative AK) in the DRLs needs to be justified when the procedures are performed in the hybrid rooms rather than with mobile Xray systems.


Subject(s)
Aneurysm/diagnostic imaging , Endovascular Procedures , Fluoroscopy/standards , Radiation Exposure/standards , Reference Standards , Aged , Aged, 80 and over , Aneurysm/surgery , Fluoroscopy/instrumentation , Humans , Middle Aged , Patient Safety , Point-of-Care Systems/standards , Radiation Exposure/prevention & control , Radiometry , Spain
11.
Chemosphere ; 235: 690-700, 2019 Nov.
Article in English | MEDLINE | ID: mdl-31279119

ABSTRACT

Mercury (Hg) is known as one of the major contaminants in the Amazon. The Tapajós River basin, in the Brazilian Amazon, has diverse anthropogenic activities which increase Hg concentrations in the aquatic ecosystem. Moreover, high concentrations of Hg are naturally found in this basin. Distribution of total (THg) and methyl (MeHg) mercury were assessed in unfiltered water (n = 47), suspended particulate matter (SPM, n = 30), superficial sediment (BS, n = 29), plankton (n = 28) and fishes (n = 129) from the Tapajós River basin. Suspended particles were the main carrier of Hg in the water column and sediment. Increased erosion, prompted by anthropic activities, led to higher Hg concentrations in water from the most impacted areas. Hg is transported mainly in particulate matter; thus, anthropic disturbances influence Hg concentrations downstream. Limnological parameters such as organic matter content influenced MeHg concentrations in water, plankton and sediment of the Tapajós basin. Hg methylation in total plankton was more efficient in lakes (13-66%) than in Tapajós River main channel (2-14%). Biotic and abiotic factors interact in a complex way in the aquatic ecosystem, making Hg concentrations to vary in food web. Gold mining and deforestation probably increase Hg levels in the Tapajós basin. Thus, in addition to Hg monitoring, prevention and remediation efforts should be focused on soil and sediment erosion control.


Subject(s)
Environmental Monitoring , Methylmercury Compounds/analysis , Water Pollutants, Chemical/analysis , Animals , Brazil , Ecosystem , Fishes/metabolism , Food Chain , Lakes , Mercury/analysis , Methylmercury Compounds/metabolism , Mining , Plankton/chemistry , Rivers/chemistry , Seafood , Soil , Water , Water Pollutants, Chemical/metabolism
12.
J Trace Elem Med Biol ; 48: 196-201, 2018 Jul.
Article in English | MEDLINE | ID: mdl-29773181

ABSTRACT

This work aimed to evaluate associated risks of fish consumption to human health, concerning mercury (Hg) and selenium (Se) concentrations in fish species largely consumed in the Tapajós River basin in the Brazilian Amazon. Total mercury (THg), methylmercury (MeHg) and Se concentrations were measured in 129 fish specimens from four sites of the Tapajós River basin. Estimated daily intake (EDI) of Hg and Se were reported regarding fish consumption. EDI were compared with the reference value of provisional tolerable daily intake proposed by the World Health Organization (WHO). Se:Hg ratios and selenium health benefit values (Se HBVs) seem to offer a more comprehensive fish safety model. THg concentrations in fishes ranged from 0.03 to 1.51 µg g-1 of wet weight (w.w.) and MeHg concentrations ranged from 0.02 to 1.44 µg g-1 (w.w.). 80% of the samples were below the value of Hg recommended by the WHO for human consumption (0.5 µg g-1 w.w.). However, Hg EDI exceeded the dose suggested by the United States Environmental Protection Agency (0.1 µg kg-1 day-1), due to the large level of fish consumption in that area. Se concentrations in fishes ranged from 0.02 to 0.44 µg g-1 w.w. An inverse pattern was observed between Hg and Se concentrations in the trophic chain (highest levels of Se in the lowest trophic levels). The molar ratio Se:Hg and Se HBVs were higher in iliophagous and herbivorous fishes, which is noteworthy to reduce toxic effects of Hg contamination. For planktivores, the content of Se and Hg was almost equimolar. Carnivorous fishes - with the exception of Hemisorubim platyrhynchos and Pseudoplatystoma fasciatum -, showed Se:Hg ratios <1. Thus, they do not act as a favorable source of Se in the diet. Therefore, reduced intake of carnivorous fishes with preferential consumption of iliophages, herbivores and, to some extent, even planktivores should be promoted as part of a healthier diet.


Subject(s)
Environmental Monitoring , Fishes , Mercury/analysis , Rivers/chemistry , Selenium/analysis , Water Pollutants, Chemical/analysis , Animals , Brazil , Environmental Exposure , Food Chain , Humans
13.
J Proteomics ; 177: 48-64, 2018 04 15.
Article in English | MEDLINE | ID: mdl-29438850

ABSTRACT

Lignocellulosic plant biomass is the most abundant carbon source in the planet, which makes it a potential substrate for biorefinery. It consists of polysaccharides and other molecules with applications in pharmaceutical, food and feed, cosmetics, paper and textile industries. The exploitation of these resources requires the hydrolysis of the plant cell wall, which is a complex process. Aiming to discover novel fungal natural isolates with lignocellulolytic capacities, a screening for feruloyl esterase activity was performed in samples taken from different metal surfaces. An extracellular enzyme extract from the most promising candidate, the natural isolate Alternaria alternata PDA1, was analyzed. The feruloyl esterase activity of the enzyme extract was characterized, determining the pH and temperature optima (pH 5.0 and 55-60 °C, respectively), thermal stability and kinetic parameters, among others. Proteomic analyses derived from two-dimensional gels allowed the identification and classification of 97 protein spots from the extracellular proteome. Most of the identified proteins belonged to the carbohydrates metabolism group, particularly plant cell wall degradation. Enzymatic activities of the identified proteins (ß-glucosidase, cellobiohydrolase, endoglucanase, ß-xylosidase and xylanase) of the extract were also measured. These findings confirm A. alternata PDA1 as a promising lignocellulolytic enzyme producer. SIGNIFICANCE: Although plant biomass is an abundant material that can be potentially utilized by several industries, the effective hydrolysis of the recalcitrant plant cell wall is not a straightforward process. As this hydrolysis occurs in nature relying almost solely on microbial enzymatic systems, it is reasonable to infer that further studies on lignocellulolytic enzymes will discover new sustainable industrial solutions. The results included in this paper provide a promising fungal candidate for biotechnological processes to obtain added value from plant byproducts and analogous substrates. Moreover, the proteomic analysis of the secretome of a natural isolate of Alternaria sp. grown in the presence of one of the most used vegetal substrates on the biofuels industry (sugar beet pulp) sheds light on the extracellular enzymatic machinery of this fungal plant pathogen, and can be potentially applied to developing new industrial enzymatic tools. This work is, to our knowledge, the first to analyze in depth the secreted enzyme extract of the plant pathogen Alternaria when grown on a lignocellulosic substrate, identifying its proteins by means of MALDI-TOF/TOF mass spectrometry and characterizing its feruloyl esterase, cellulase and xylanolytic activities.


Subject(s)
Alternaria/metabolism , Carboxylic Ester Hydrolases/metabolism , Cell Wall/metabolism , Lignin/metabolism , Alternaria/enzymology , Cell Wall/enzymology , Fungal Proteins/analysis , Hydrolysis , Mitosporic Fungi , Plants/microbiology , Plants/ultrastructure , Proteome/analysis , Proteomics/methods
14.
J Trace Elem Med Biol ; 34: 50-5, 2016 Mar.
Article in English | MEDLINE | ID: mdl-26854245

ABSTRACT

This work aimed to investigate metal bioaccumulation by mussels (Perna perna) and Lion's Scallop (Nodipecten nodosus) farmed in tropical bays, in order to estimate spatial and temporal variation in the exposure to these elements, as well as human health risk. The concentration of each measured element was considered for this evaluation, using maximum residue level (MRL) in foods established by the Brazilian (ANVISA), American (USFDA) and European Communities (EC) legislations. Values for estimated daily ingestion (EDI) were determined for metals intake through mussel and scallop consumption. These estimates were compared with the reference value of (PTDI) proposed by World Health Organization (WHO). Trace elements concentration was measured on ninety mussels P. perna (tissue) and ninety Lion's Scallop N. nodosus (muscle and gonad) reared in four different tropical areas of the Southeast Brazilian coast, between 2009 and 2010. Zinc (Zn), Iron (Fe), Copper (Cu), Manganese (Mn), Chrome (Cr), Nickel (Ni), Cadmium (Cd) and Lead (Pb) concentrations were measured by flame atomic absorption spectrometry after acid mineralization. Cd and Mn were more efficiently bioaccumulated by scallops than mussels and the opposite was found for Fe, Cu and Ni. Guanabara Bay and Sepetiba Bay were considered the most impacted between ecosystems studied. Higher Cd values in Arraial do Cabo in the other sites studied were associated with upwelling that occurs in the region. Consumption of both species cannot be considered safe, because the Cu and Cr concentrations, in accordance with the limits established by the Brazilian Agency (ANVISA). On the other hand, any EDI value exceeded the corresponding value of the PTDI, proposed by World Health Organization (WHO).


Subject(s)
Bivalvia/metabolism , Metals/metabolism , Water Pollutants, Chemical/metabolism , Animals , Brazil , Cadmium/analysis , Cadmium/metabolism , Chromium/analysis , Chromium/metabolism , Copper/analysis , Copper/metabolism , Environmental Monitoring , Metals/analysis , Water Pollutants, Chemical/analysis
15.
Ann Vasc Surg ; 29(5): 1035-9, 2015 Jul.
Article in English | MEDLINE | ID: mdl-25771745

ABSTRACT

Revascularization of femoral arteries from descending thoracic or supraceliac aorta is an uncommon procedure, in part because of the popularization of the technically easier extra-anatomic bypasses. However, using those aortic levels as the source of the bypass inflow is a useful alternative in selected patients with aortoiliac disease, with excellent results. We report long-term results in 4 patients with revascularization from thoracic aorta and another 2 cases from aorta at supraceliac level. This technique should be considered as a good alternative in patients with adverse abdominal conditions or with a severely diseased infrarenal aorta due to heavy calcification.


Subject(s)
Aorta, Thoracic/surgery , Blood Vessel Prosthesis Implantation/methods , Femoral Artery/surgery , Lower Extremity/blood supply , Peripheral Arterial Disease/surgery , Aged , Aortography/methods , Femoral Artery/diagnostic imaging , Humans , Male , Middle Aged , Patient Selection , Peripheral Arterial Disease/diagnostic imaging , Tomography, X-Ray Computed , Treatment Outcome
16.
J Mater Sci Mater Med ; 26(1): 5353, 2015 Jan.
Article in English | MEDLINE | ID: mdl-25578707

ABSTRACT

The corrosion resistance of Wiron(®)88, a Ni-Cr-Mo alloy, was evaluated in liquid growth media in the absence and presence of the Streptococcus sobrinus and Streptococcus mutans strains. Open circuit potential measurements, cyclic voltammetry, linear sweep voltammetry, as well as electronic microscopy coupled to electron diffraction spectroscopy (SEM/EDS), were the main techniques used in this study. It was concluded that the presence of S. sobrinus and S. mutans have only a slight effect on the corrosion resistance of the Wiron(®)88 alloy, with the S. mutans being slightly more aggressive. For both strains the corrosion resistance R p is of the same order (kΩ cm(2)). After 24 h immersion the S. sobrinus lead to and R p of 11.02, while the S. mutans lead to of 5.59 kΩ cm(2). SEM/EDS studies on the Wiron(®)88 samples, with 24 days of immersion, at 37 °C, have confirmed bio-corrosion of the alloy occurring through the dissolution of Ni as Ni(2+) and formation of chromium and molybdenum oxides. The bacterial adhesion to the surface is not uniform.


Subject(s)
Nickel/chemistry , Streptococcus mutans/cytology , Streptococcus sobrinus/cytology , Alloys/chemistry , Dental Alloys/chemistry , Electrochemistry , Electronics , Electrons , Ions , Materials Testing , Microbial Sensitivity Tests , Microscopy, Electron, Scanning , Potentiometry , Saliva , Spectrophotometry , Temperature , Thermodynamics
17.
Vet Parasitol ; 190(3-4): 599-603, 2012 Dec 21.
Article in English | MEDLINE | ID: mdl-22832071

ABSTRACT

This is the first report of Ascocotyle (Phagicola) longa Ransom, 1920 (Digenea: Heterophyidae) in Argentina confirmed by morphological and molecular studies. The metacercaria was found encysted in myotomal musculature, heart and mesentery of the mullet Mugil liza (Pisces: Mugilidae) from Samborombon bay. We provide a morphological description of the metacercaria which we identified using species-specific primers for A. (Phagicola) longa and nucleotid sequence. This worldwide parasite has been reported as one of the causative agents of heterophyiosis, an emerging fish-borne disease of humans, contracted by the consumption of raw mullet. The discovery of A. (Phagicola) longa in Argentina represents a warning of the potentially great impact of this parasite on public health.


Subject(s)
Fish Diseases/parasitology , Smegmamorpha , Trematoda/classification , Trematode Infections/veterinary , Animals , Argentina/epidemiology , Fish Diseases/epidemiology , Trematoda/anatomy & histology , Trematode Infections/epidemiology , Trematode Infections/parasitology
18.
Vet Parasitol ; 188(3-4): 225-30, 2012 Sep 10.
Article in English | MEDLINE | ID: mdl-22541793

ABSTRACT

Prevalence of Toxoplasma gondii infection in 510 free-range (FR) chickens (380 from 33 small farms, and 130 from a slaughter house for FR chickens) from Espírito Santo state, southeastern Brazil, was investigated. Antibodies to T. gondii were sought using commercial indirect haemagglutination (IHAT, Imuno-HAI Toxo(®), Wama Diagnóstica, São Paulo, Brazil, cut-off 1:16) and the modified agglutination test (MAT, cut-off 1:25) tests. Attempts were made to isolate viable T. gondii from seropositive chickens by bioassay in mice. Pooled samples of brain, heart and quadriceps muscle of one thigh (total 40 g) from 64 chickens with IHAT titers of ≥ 1:16 were minced, digested in pepsin and bioassayed in mice. Antibodies to T. gondii were found in 40.4% (206/510) FR chickens by IHAT (titer ≥ 1:16) and 38.8% (198/510) by MAT (titer ≥ 1:25); concordance between IHAT and MAT was 81.6% (kappa index=0.614). Viable T. gondii was isolated (designated TgCkBr234-281) from 48 of 64 (75%) seropositive (IHAT titers ≥ 1:32) FR chickens. Most isolates of T. gondii were virulent for mice; 100% of mice inoculated with 44 of 48 isolates died of toxoplasmosis within 30 days post inoculation (p.i). An epidemiological investigation revealed that people living in rural areas have little knowledge about the parasite and about the risk of acquiring it from raw meat. Results indicated that the locally available IHAT was useful for screening of chicken sera for T. gondii antibodies.


Subject(s)
Antibodies, Protozoan/blood , Chickens/parasitology , Poultry Diseases/parasitology , Toxoplasma/isolation & purification , Toxoplasmosis, Animal/parasitology , Agglutination Tests/veterinary , Animals , Biological Assay/veterinary , Brain/parasitology , Brazil/epidemiology , Female , Heart/parasitology , Hemagglutination Tests/veterinary , Mice , Muscles/parasitology , Poultry Diseases/epidemiology , Seroepidemiologic Studies , Toxoplasma/immunology , Toxoplasmosis, Animal/epidemiology
19.
Rev Mal Respir ; 28(3): 317-21, 2011 Mar.
Article in French | MEDLINE | ID: mdl-21482334

ABSTRACT

M. tuberculosis is a possible cause of uveitis; the diagnosis is often difficult. The aim of this study is to evaluate, in this context, the application of an interferon gamma assay, the SpotTB™. The prospective study, in patients presenting with uveitis without obvious cause and not resolving with local treatment, compared the therapeutic approach (giving antituberculous treatment or not) with and without the result of the SpotTB™. The analyses included 23 patients: 78% had received BCG; 78% had isolated ocular involvement; 22% had associated mediastinal lymphadenopathy. The results of the IDR and the SpotTB™ were concordant in 61%, discordant in 22% and non-evaluable in 17% of cases. In the patients with isolated ocular involvement the SpotTB™ avoided treatment in five and reinforced the decision not to treat in 13 others. In the patients with mediastinal lymphadenopathy, the SpotTB™ reinforced the diagnosis of sarcoidosis in four cases (one lost from view). In conclusion, when infection with M. tuberculosis is considered in the aetiology of uveitis the SpotTB™ allows, in a significant number of cases, the avoidance of antituberculous treatment.


Subject(s)
Interferon-gamma/blood , Mycobacterium tuberculosis/isolation & purification , Reagent Kits, Diagnostic , Tuberculosis, Ocular/diagnosis , Uveitis, Anterior/diagnosis , Adult , Aged , Antitubercular Agents/therapeutic use , BCG Vaccine , Diagnosis, Differential , Female , Humans , Male , Middle Aged , Predictive Value of Tests , Prospective Studies , Sarcoidosis/diagnosis , Sensitivity and Specificity , Treatment Outcome , Tuberculin Test , Tuberculosis, Ocular/blood , Tuberculosis, Ocular/drug therapy , Tuberculosis, Ocular/microbiology , Uveitis, Anterior/drug therapy , Uveitis, Anterior/microbiology , Uveoparotid Fever/diagnosis
20.
J Abnorm Child Psychol ; 39(4): 589-600, 2011 May.
Article in English | MEDLINE | ID: mdl-21234796

ABSTRACT

We examined the persistence of psychiatric disorders at approximately 18 and 30 months after a hurricane among a random sample of the child and adolescent population (4-17 years) of Puerto Rico. Data were obtained from caretaker-child dyads (N = 1,886) through in person interviews with primary caretakers (all children) and youth (11-17 years) using the Diagnostic Interview Schedule for Children IV in Spanish. Logistic regressions, controlling for sociodemographic variables, were used to study the relation between disaster exposure and internalizing, externalizing, or any disorder. Children's disaster-related distress manifested as internalizing disorders, rather than as externalizing disorders at 18 months post-disaster. At 30 months, there was no longer a significant difference in rates of disorder between hurricane-exposed and non-exposed youth. Results were similar across age ranges. Rates of specific internalizing disorders between exposed and unexposed children are provided. Research and clinical implications are discussed.


Subject(s)
Cyclonic Storms , Disasters , Mental Disorders/epidemiology , Adolescent , Child , Child, Preschool , Diagnostic and Statistical Manual of Mental Disorders , Female , Humans , Logistic Models , Male , Mental Disorders/etiology , Prevalence , Puerto Rico , Risk
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