Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 113
Filtrar
1.
J Intellect Disabil Res ; 68(3): 277-284, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38031737

RESUMO

BACKGROUND: People with intellectual disabilities (ID) die on an average 20 years earlier to the general population. They have higher rates of multimorbidity and polypharmacy. Around 25% of people with ID report chronic constipation. The England Learning Disabilities Mortality Review found that nearly 25% of deaths identified constipation as a long-term health problem. However, the likely risk factors for constipation related harm are poorly enumerated. We sought to identify possible specific high-risk factors by examining the clinical characteristics of people with ID admitted to hospital with constipation. METHODS: Data of people with ID admitted with constipation in two general hospitals covering a population of 1.3 million from 2017 to 2022 were reported using the STROBE guideline for cohort studies. Collected data included age, gender, intellectual disability severity, recorded medication, presenting complaint and co-morbidities. The medication anticholinergic burden was calculated using the anticholinergic burden scale. Continuous variables were summarised by mean and standard deviation if normally distributed, with categorical variables summarised by the number and percentage in each category. RESULTS: Of 46 admissions (males 52%), 57% had moderate to profound ID, 37% had epilepsy, 41% prescribed antiseizure medication (ASM) and 45% were on laxatives. Average age was 46 years. The anticholinergic burden score mean was 2.3 and median, one. CONCLUSIONS: We can hypothesise that people with more severe ID, suffering from epilepsy and on ASM may be more at risk of developing severe constipation. Some admissions may be avoided with earlier use of laxatives in the community.


Assuntos
Epilepsia , Deficiência Intelectual , Masculino , Humanos , Pessoa de Meia-Idade , Deficiência Intelectual/epidemiologia , Laxantes , Constipação Intestinal/epidemiologia , Hospitais , Fatores de Risco , Antagonistas Colinérgicos/uso terapêutico
2.
Syst Rev ; 12(1): 203, 2023 10 31.
Artigo em Inglês | MEDLINE | ID: mdl-37907971

RESUMO

BACKGROUND: Mental ill-health and substance use bear a substantial burden and harm on young people and often arise from co-occurring and compounding risk factors, such as traumatic stress. Trauma-informed prevention of mental ill-health and substance use demonstrates significant promise in reducing this burden. A systematic literature review is required to identify and summarise the effectiveness, feasibility, acceptability, and design principles underpinning existing trauma-informed mental ill-health and/or substance use prevention programmes for young people aged 12-24 years. METHODS: MEDLINE, Embase, CINAHL, PsychINFO, and Cochrane Library will be searched from 2012 through September 2022. Reference lists of included articles will be citation-chained. Title and abstracts will be screened and two reviewers will review articles full-text. One reviewer will extract data from eligible articles using a piloted data extraction form, and 20% of the data will be verified by a second reviewer. Risk of bias will be assessed using the Cochrane risk-of-bias tool for randomised trials (RoB 2), Risk of Bias in Non-randomised Studies of Interventions (ROBINS-I), and The Joanna Briggs Institute Critical Appraisal Checklist for Quasi-Experimental Studies and The Joanna Briggs Institute Critical Appraisal Checklist for Qualitative Research (CASP), depending on the study type. Characteristics of existing trauma-informed mental ill-health and/or substance use prevention programmes for young people will be summarised narratively. Effectiveness, feasibility, and acceptability will be qualitatively described and summarised, with proportions and effect sizes quantitatively synthesised, where possible. DISCUSSION: Trauma-informed approaches to prevention demonstrate significant promise, yet to date, no study has systematically summarised and synthesised the available literature. To fill this gap, the present review will systematically identify and summarise the effectiveness, feasibility, acceptability, and design principles underpinning existing trauma-informed mental health and/or substance use prevention programmes for young people aged 12-24. This review will inform the development, adaptation, evaluation, and implementation of future trauma-informed mental ill-health and substance use prevention programmes for young people. Findings will inform critical efforts to interrupt and prevent already elevated trajectories of mental ill-health, substance use, and related harms among those young people exposed to adversity. SYSTEMATIC REVIEW REGISTRATION: PROSPERO CRD42022353883.


Assuntos
Depressão , Transtornos Relacionados ao Uso de Substâncias , Humanos , Adolescente , Transtornos Relacionados ao Uso de Substâncias/prevenção & controle , Ansiedade , Transtornos de Ansiedade , Saúde Mental , Revisões Sistemáticas como Assunto
3.
J Sleep Res ; : e13940, 2023 May 16.
Artigo em Inglês | MEDLINE | ID: mdl-37192612

RESUMO

This study investigated how changing or maintaining parent-set bedtimes over time relates to adolescents' sleep timing, latency, and duration. Adolescents (n = 2509; Mage = 12.6 [0.5] years; 47% m) self-reported their sleep patterns, and whether they had parent-set bedtimes on two separate occasions in 2019 (T1; 12.6 years) and 2020 (T2; 13.7 years). We identified four groups based on parent-set bedtimes: (1) bedtime rules at both T1 and T2 (46%, n = 1155), (2) no bedtime rules at T1 nor T2 (26%, n = 656), (3) bedtime rules at T1 but not T2 (19%, n = 472), (4) no bedtime rules at T1 but a parent-set bedtime at T2 (9%, n = 226). As expected, the entire sample showed that bedtimes generally became later and sleep duration shorter across adolescence, but the change differed among the groups. Adolescents whose parents introduced bedtime rules at T2 reported earlier bedtimes and longer sleep duration (~20 min) compared with adolescents with no bedtime rules at T2. Importantly, they no longer differed from adolescents who consistently had bedtimes across T1 and T2. There was no significant interaction for sleep latency, which declined at a similar rate for all groups. These results are the first to suggest that maintaining or re-introducing a parent-set bedtime may be possible and beneficial for adolescents' sleep.

4.
Front Microbiol ; 12: 674147, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34220757

RESUMO

The aim of the study was to evaluate the genotypic and phenotypic characteristics of 20 strains of S. Heidelberg (SH) isolated from broilers produced in southern Brazil. The similarity and presence of genetic determinants linked to virulence, antimicrobial resistance, biofilm formation, and in silico-predicted metabolic interactions revealed this serovar as a threat to public health. The presence of the ompC, invA, sodC, avrA, lpfA, and agfA genes was detected in 100% of the strains and the luxS gene in 70% of them. None of the strains carries the bla SHV, mcr-1, qnrA, qnrB, and qnrS genes. All strains showed a multidrug-resistant profile to at least three non-ß-lactam drugs, which include colistin, sulfamethoxazole, and tetracycline. Resistance to penicillin, ceftriaxone (90%), meropenem (25%), and cefoxitin (25%) were associated with the presence of bla CTX-M and bla CMY-2 genes. Biofilm formation reached a mature stage at 25 and 37°C, especially with chicken juice (CJ) addition. The sodium hypochlorite 1% was the least efficient in controlling the sessile cells. Genomic analysis of two strains identified more than 100 virulence genes and the presence of resistance to 24 classes of antibiotics correlated to phenotypic tests. Protein-protein interaction (PPI) prediction shows two metabolic pathways correlation with biofilm formation. Virulence, resistance, and biofilm determinants must be constant monitoring in SH, due to the possibility of occurring infections extremely difficult to cure and due risk of the maintenance of the bacterium in production environments.

5.
Foods ; 9(1)2020 Jan 18.
Artigo em Inglês | MEDLINE | ID: mdl-31963672

RESUMO

For hundreds of years, Taiwan has been famous for its various specialty teas. The sensory features of these teas have been well specialized and standardized through sensory evaluations performed by tea experts in yearly competitions throughout history. However, the question arises of whether young Taiwanese consumers, whose dietary behaviors have become Westernized, agree with the conventional sensory standards and association/postprandial concepts in the traditional tea market of Taiwan. To study young Taiwanese consumers' ideas towards traditional specialty teas, this research recruited 109 respondents, younger than the age of 30, to taste seven Taiwanese specialty tea infusions of various degrees of fermentation, and their opinions were gathered by questionnaires composed of check-all-that-apply (CATA) questions and hedonic scales. Through statistical analyses, we found that several tea sensory attributes which were emphasized in experts' descriptive sensory evaluations were not appreciated by the young Taiwanese people. Instead, tea aroma and late sweetness/palatable/smooth/refreshing mouthfeels were the most important sensory attributes contributing to their tea preference. Overall, there would generally be no problem in serving young Taiwanese consumers lightly-fermented oolong teas that generate the highest digestive and lowest heartburn postprandial perceptions.

6.
Dis Esophagus ; 33(8)2020 Aug 03.
Artigo em Inglês | MEDLINE | ID: mdl-31950184

RESUMO

Locally advanced esophageal cancer is associated with poor long-term survival. Pre- and post-treatment stages may differ because of neoadjuvant therapy and inaccuracies in staging. The aim of this study was to determine the outcomes of patients staged with clinical T3 N3 and pathological T3 N3 carcinoma of the esophagus and determine differences between the groups. Consecutive patients from a single unit between 2010 and 2018 were included with either clinical (cT3 N3) or pathological (pT3 N3) esophageal cancer. Outcomes were compared between patients that underwent esophagectomy with or without neoadjuvant treatment and those patients staged cT3 N3 treated non-surgically (NSR). Patients were staged using the TNM 8. This study included 156 patients, 63 patients were staged cT3 N3 initially and had NSR treatment, only three of these had radical treatment. Of the remaining 93 patients who underwent esophagectomy, 34 were initially staged as cT3 N3, 54 were found to be pT3 N3 having been staged earlier initially, and five were unchanged before and after treatment. Median overall survival (OS) for surgical cT3 N3 patients was significantly longer than pT3 N3 and NSR (median: NR vs 19 vs 8 months, P < 0.001). Twenty-seven patients with cT3 N3 had lower staging following treatment, while three had a higher stage. T3 N3 disease carries a poor prognosis. Within this cohort, cT3 N3 disease treated surgically has a high 5-year OS suggesting possible over-staging and stage migration due to neoadjuvant therapy. Those not having surgery, have a dismal prognosis. The impact of neoadjuvant treatment cannot be predicted and, current staging modalities may be inaccurate. Clinical stage should be used with caution when counseling patients regarding management and prognosis.


Assuntos
Neoplasias Esofágicas , Neoplasias Esofágicas/patologia , Esofagectomia , Humanos , Terapia Neoadjuvante , Estadiamento de Neoplasias , Prognóstico , Estudos Retrospectivos , Resultado do Tratamento
7.
Rozhl Chir ; 98(8): 326-327, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31462055

RESUMO

INTRODUCTION: The umbilical vein can become recanalised due to portal hypertension in patients with liver cirrhosis but the condition is rarely clinically significant. Although bleeding from this enlarged vein is a known complication, the finding of thrombophlebitis has not been previously described. CASE REPORT: We report the case of a 62-year-old male with a history of liver cirrhosis due to alcoholic liver disease presenting to hospital with epigastric pain. A CT scan of the patients abdomen revealed a thrombus with surrounding inflammatory changes in a recanalised umbilical vein. The patient was managed conservatively and was discharged home the following day. CONCLUSION: Thrombophlebitis of a recanalised umbilical vein is a rare cause of abdominal pain in patients with liver cirrhosis.


Assuntos
Dor Abdominal , Tromboflebite , Veias Umbilicais , Dor Abdominal/diagnóstico por imagem , Dor Abdominal/etiologia , Hemorragia , Humanos , Masculino , Pessoa de Meia-Idade , Veia Porta , Tromboflebite/complicações , Tomografia Computadorizada por Raios X
8.
Psychol Med ; 47(10): 1761-1770, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-28222825

RESUMO

BACKGROUND: No existing models of alcohol prevention concurrently adopt universal and selective approaches. This study aims to evaluate the first combined universal and selective approach to alcohol prevention. METHOD: A total of 26 Australian schools with 2190 students (mean age: 13.3 years) were randomized to receive: universal prevention (Climate Schools); selective prevention (Preventure); combined prevention (Climate Schools and Preventure; CAP); or health education as usual (control). Primary outcomes were alcohol use, binge drinking and alcohol-related harms at 6, 12 and 24 months. RESULTS: Climate, Preventure and CAP students demonstrated significantly lower growth in their likelihood to drink and binge drink, relative to controls over 24 months. Preventure students displayed significantly lower growth in their likelihood to experience alcohol harms, relative to controls. While adolescents in both the CAP and Climate groups demonstrated slower growth in drinking compared with adolescents in the control group over the 2-year study period, CAP adolescents demonstrated faster growth in drinking compared with Climate adolescents. CONCLUSIONS: Findings support universal, selective and combined approaches to alcohol prevention. Particularly novel are the findings of no advantage of the combined approach over universal or selective prevention alone.


Assuntos
Comportamento do Adolescente , Consumo Excessivo de Bebidas Alcoólicas/prevenção & controle , Educação em Saúde/métodos , Avaliação de Resultados em Cuidados de Saúde/métodos , Psicoterapia de Grupo/métodos , Consumo de Álcool por Menores/prevenção & controle , Adolescente , Austrália , Criança , Terapia Combinada , Feminino , Humanos , Masculino
9.
Dis Esophagus ; 30(3): 1-5, 2017 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-27628015

RESUMO

Topical negative pressure is widely used in the management of superficial wounds. The use of this technology in the management of oesophageal perforations is becoming increasingly common. This systematic review aims to capture available evidence about its use in this setting. Medline and Embase were searched using MeSH terms and free text: esophageal perforation; esophageal injury; vacuum assisted closure; vacuum therapy device; esophagus; wounds penetrating; esophageal perforation; wound healing; negative pressure wound therapy. Searches were carried out between April and November 2015. Case series, cohort trials and controlled trials were included. Additional studies were found by hand searching reference lists. Eleven studies met the inclusion criteria with 180 patients. Nine of the studies were case series and two were retrospective comparisons of negative pressure with stents or clips. Healing of the perforation occurred in 163/179 patients and the overall mortality was 12.8%. Compared with published data on mortality from oesophageal perforation, the application of negative pressure appears to be beneficial. The studies are, however, limited to case series and retrospective cohort studies. The number of patients in each study is small and in the absence of randomized trials demonstrating a lack of bias firm conclusions cannot be made.


Assuntos
Fístula Anastomótica/cirurgia , Perfuração Esofágica/cirurgia , Esofagoscopia/métodos , Esôfago/cirurgia , Tratamento de Ferimentos com Pressão Negativa/métodos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Fístula Anastomótica/etiologia , Esôfago/lesões , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Resultado do Tratamento , Cicatrização , Adulto Jovem
10.
Foodborne Pathog Dis ; 13(3): 128-34, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-26824600

RESUMO

The aim of this study was to characterize and compare Staphylococcus spp. isolated from hospitalized patients and beef marketed in the city of Porto Velho-RO, Brazil. The isolates were subjected to antibiogram tests, adherence capacity tests, detection of the mecA gene, and epidemiological investigation by the random amplified polymorphic DNA (RAPD) technique, using the primers M13 and H12. Among the 123 Staphylococcus spp. isolates, 50 were identified as S. aureus and 73 as coagulase-negative Staphylococcus; among the latter, 7 species were identified. It was observed that the coagulase-negative Staphylococcus isolates showed greater adhesion ability than S. aureus. The profile of antimicrobial susceptibility was different among isolates, all of which were susceptible to vancomycin and linezolid, and had high penicillin resistance rates, varying according to the bacterial class and the source. In this study, all strains were negative for mecA gene detection; however, 36% of S. aureus and 17% of coagulase-negative Staphylococcus were resistant to oxacillin. The genetic relationship of these bacteria, analyzed by RAPD, was able to discriminate the species of coagulase-negative Staphylococcus strains of S. aureus along its origin. It was concluded that the isolates of Staphylococcus spp. derived from beef and human infections differ genetically. Thus, it is suggested that isolates from beef, which were grouped within hospital isolates, were probably carried via contact with beef in hospital professionals or patients.


Assuntos
Antibacterianos/farmacologia , Doenças Transmitidas por Alimentos/microbiologia , Carne Vermelha/microbiologia , Infecções Estafilocócicas/microbiologia , Staphylococcus/isolamento & purificação , Animais , Proteínas de Bactérias/genética , Brasil/epidemiologia , Bovinos , Coagulase/genética , Humanos , Testes de Sensibilidade Microbiana , Oxacilina/farmacologia , Resistência às Penicilinas , Infecções Estafilocócicas/epidemiologia , Staphylococcus/genética , Staphylococcus aureus/genética , Staphylococcus aureus/isolamento & purificação , Vancomicina/farmacologia
11.
J R Army Med Corps ; 162(5): 373-378, 2016 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26578479

RESUMO

BACKGROUND: Key performance indicators (KPIs) are metrics that compare actual care against an ideal structure, process or outcome standard. KPIs designed to assess performance in deployed military surgical facilities have previously been published. This study aimed to review the overall performance of surgical trauma care for casualties treated at Role 3 Camp Bastion, Medical Treatment Facility, Afghanistan, in light of the existing Defence Medical Services (DMS) KPIs. The secondary aims were to assess the utility of the surgical KPIs and make recommendations for future surgical trauma care review. METHODS: Data on 22 surgical parameters were prospectively collected for 150 injured patients who had primary surgery at Camp Bastion between 1 May 2013 and 20 August 2013. Additional information for these patients was obtained using the Joint Theatre Trauma Register. The authors assessed data recording, applicability and compliance with the KPIs. RESULTS: Median data recording was 100% (IQR 98%-100%), median applicability was 56% (IQR 10%-99%) and median compliance was 78% (IQR 58%-93%). One KPI was not applicable to any patient in our population. Eleven KPIs achieved >80% compliance, five KPIs had 80%-60% compliance and five KPIs had <60% compliance. Recommendations are made for minor modifications to the current KPIs. CONCLUSION: 78% compliance with the DMS KPIs provides a snapshot of the performance of the surgical aspect of military trauma care in 2013. The KPIs highlight areas for improvement in service delivery. Individual KPI development should be driven by evidence and reflect advances in practice and knowledge. A method of stakeholder consultation, and sequential refinement following evidence review, may be the right process to develop the future set of DMS KPIs.


Assuntos
Fidelidade a Diretrizes , Medicina Militar/normas , Indicadores de Qualidade em Assistência à Saúde , Procedimentos Cirúrgicos Operatórios/normas , Traumatologia/normas , Campanha Afegã de 2001- , Humanos , Militares , Guias de Prática Clínica como Assunto , Estudos Prospectivos , Reino Unido
12.
Psychol Med ; 46(5): 981-94, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26620582

RESUMO

BACKGROUND: Most empirical studies into the covariance structure of psychopathology have been confined to adults. This work is not developmentally informed as the meaning, age-of-onset, persistence and expression of disorders differ across the lifespan. This study investigates the underlying structure of adolescent psychopathology and associations between the psychopathological dimensions and sex and personality risk profiles for substance misuse and mental health problems. METHOD: This study analyzed data from 2175 adolescents aged 13.3 years. Five dimensional models were tested using confirmatory factor analysis and the external validity was examined using a multiple-indicators multiple-causes model. RESULTS: A modified bifactor model, with three correlated specific factors (internalizing, externalizing, thought disorder) and one general psychopathology factor, provided the best fit to the data. Females reported higher mean levels of internalizing, and males reported higher mean levels of externalizing. No significant sex differences emerged in liability to thought disorder or general psychopathology. Liability to internalizing, externalizing, thought disorder and general psychopathology was characterized by a number of differences in personality profiles. CONCLUSIONS: This study is the first to identify a bifactor model including a specific thought disorder factor. The findings highlight the utility of transdiagnostic treatment approaches and the importance of restructuring psychopathology in an empirically based manner.


Assuntos
Modelos Psicológicos , Transtornos da Personalidade/diagnóstico , Personalidade , Pensamento , Adolescente , Adulto , Pesquisa Empírica , Análise Fatorial , Feminino , Humanos , Masculino , Nova Zelândia , Escalas de Graduação Psiquiátrica , Instituições Acadêmicas , Estudantes
13.
Sci Total Environ ; 424: 344-50, 2012 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-22425277

RESUMO

In this study the effect of organic and inorganic nanomaterials (NMs) on the structural diversity of the soil microbial community was investigated by Denaturing Gradient Gel Electrophoresis, after amplification with universal primers for the bacterial region V6-V8 of 16S rDNA. The polymers of carboxylmethyl-cellulose (CMC), of hydrophobically modified CMC (HM-CMC), and hydrophobically modified polyethylglycol (HM-PEG); the vesicles of sodium dodecyl sulphate/didodecyl dimethylammonium bromide (SDS/DDAB) and of monoolein/sodium oleate (Mo/NaO); titanium oxide (TiO(2)), titanium silicon oxide (TiSiO(4)), CdSe/ZnS quantum dots, gold nanorods, and Fe/Co magnetic fluid were the NMs tested. Soil samples were incubated, for a period of 30 days, after being spiked with NM suspensions previously characterized by Dynamic Light Scattering (DLS) or by an ultrahigh-resolution scanning electron microscope (SEM). The analysis of similarities (ANOSIM) of DGGE profiles showed that gold nanorods, TiO(2), CMC, HM-CMC, HM-PEG, and SDS/DDAB have significantly affected the structural diversity of the soil bacterial community.


Assuntos
Bactérias/efeitos dos fármacos , Biota , Nanopartículas/toxicidade , Microbiologia do Solo , Bactérias/genética , DNA Bacteriano/análise , Eletroforese em Gel de Gradiente Desnaturante , Compostos Inorgânicos/classificação , Compostos Inorgânicos/toxicidade , Nanopartículas Metálicas/classificação , Nanopartículas Metálicas/toxicidade , Análise Multivariada , Nanopartículas/classificação , Compostos Orgânicos/classificação , Compostos Orgânicos/toxicidade , Reação em Cadeia da Polimerase , RNA Ribossômico 16S/análise
15.
J Vet Diagn Invest ; 23(6): 1146-52, 2011 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-22362795

RESUMO

In the current study, the virulence factors in Escherichia coli isolates from bovine mastitis were investigated, and the connection between these factors and infection was evaluated using phenotypic and genotypic analyses. Twenty-seven E. coli isolates were analyzed, and 2 were shown to produce verotoxin. All isolates had the ability to produce biofilms, although at different levels. One isolate was found to be sensitive to the bactericidal activity of bovine serum, 11 were intermediate, and 15 were resistant. Some isolates showed resistance to trimethoprim sulfa (9) and ampicillin (4), intermediate resistance to neomycin (1) and trimethoprim sulfa (5), and simultaneous resistance to ampicillin and trimethoprim sulfa (4). The fimH gene was found in all isolates and was associated with other virulence markers: pap (1), stb (8), cs31a (3), stb and vt2 (2), cs31a and stb (3), east1 and kps (1), stb and east1 (1), cs31a and east1 (1), and cs31a, stb, pap, and iucD (1). Serogroups were determined for 3 isolates: O93:H4, O83:H19, and O15:H11. Phylogenetic analysis showed that 23 isolates belonged to group A and 4 belonged to B1. The findings revealed that these E. coli isolates are opportunistic pathogens with different virulence factors. The results indicate that the pathogenicity route of E. coli in bovine mastitis is not a consequence of 1 specific virulence factor.


Assuntos
Antibacterianos/farmacologia , Infecções por Escherichia coli/veterinária , Escherichia coli/classificação , Mastite Bovina/microbiologia , Fatores de Virulência/metabolismo , Animais , Biofilmes , Bovinos , Farmacorresistência Bacteriana Múltipla , Escherichia coli/efeitos dos fármacos , Escherichia coli/metabolismo , Infecções por Escherichia coli/microbiologia , Feminino , Regulação Bacteriana da Expressão Gênica/fisiologia , Proteínas Associadas a Pancreatite , Sorotipagem , Fatores de Virulência/genética
16.
Scand J Immunol ; 64(2): 125-36, 2006 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-16867157

RESUMO

To probe the potential role of Th1 versus Th2 reactivity underlying the hygiene hypothesis, intrinsic levels of Th1-associated and Th2-associated antibodies in the serum of wild rodents were compared with that in various strains of laboratory rodents. Studies using rat lung antigens as a target indicated that wild rats have substantially greater levels of autoreactive, polyreactive immunoglobulin G (IgG), but not autoreactive, polyreactive IgM than do laboratory rats, both on a quantitative and qualitative basis. Increased levels of serum IgG and IgE were observed in both wild rats and wild mice relative to their laboratory-raised counterparts, with the effect being most pronounced for IgE levels. Further, wild rats had greater intrinsic levels of both Th1- and Th2-associated IgG subclasses than did lab rats. The habitat (wild versus laboratory raised) had a more substantial impact on immunoglobulin concentration than did age, strain or gender in the animals studied. The presence in wild rodents of increased intrinsic, presumably protective, non-pathogenic responses similar to both autoimmune (autoreactive IgG, Th1-associated) and allergic (IgE, Th2-associated) reactions as well as increased levels of Th1-associated and Th2-associated IgG subclasses points toward a generally increased stimulation of the immune system in these animals rather than a shift in the nature of the immunoreactivity. It is concluded that, at least to the extent that feedback inhibition is a controlling element of immunoreactivity, an overly hygienic environment may affect the threshold of both types of immune responses more so than the balance between the different responses.


Assuntos
Animais de Laboratório/imunologia , Animais Selvagens/imunologia , Higiene , Imunoglobulina E/sangue , Imunoglobulina G/sangue , Imunoglobulina M/sangue , Roedores/imunologia , Animais , Formação de Anticorpos/imunologia , Autoimunidade/imunologia , Meio Ambiente , Ensaio de Imunoadsorção Enzimática , Feminino , Hipersensibilidade/imunologia , Masculino , Camundongos , Camundongos Endogâmicos , Ratos , Roedores/sangue , Células Th1/imunologia , Células Th2/imunologia
17.
AJNR Am J Neuroradiol ; 27(3): 533-47, 2006 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-16551990

RESUMO

BACKGROUND: Although the imaging, spectroscopic, and diffusion characteristics of brains of infants with neonatal encephalopathy have been described, the time course during which these changes evolve is not clear. The results of sequential MR imaging studies--including anatomic MR imaging, proton MR spectroscopy, and diffusion tensor imaging (DTI)--of 10 patients enrolled prospectively in a study of neonatal encephalopathy are reported to help to clarify the time course of changes in different brain regions during the first 2 weeks of life. METHODS: Ten neonates were prospectively enrolled in a study of the evolution of MR findings in neonatal encephalopathy and were studied 2 (8 patients) or 3 (2 patients) times within the first 2 weeks of life. The MR examination included spin-echo T1 and T2-weighted images, DTI, and long echo time (288 milliseconds) proton MR spectroscopy. Diffusion parameters (diffusivity [D(av)], fractional anisotropy [FA], and individual eigenvalues) were calculated for 10 1-cm2 regions of interest in each hemisphere that were placed based on anatomic landmarks. D(av) and FA were then measured manually in the same areas on a workstation. Metabolite ratios (NAA/Ch, Cr/Ch, Cr/NAA, Lac/Ch, and Lac/NAA) were calculated in 7 regions of interest. Imaging appearance, diffusion parameters, and metabolite ratios were then evaluated longitudinally (comparing with other studies on the same patient at different times) and cross-sectionally (comparing all studies performed on the same postnatal day). RESULTS: In most of the patients a characteristic evolution of DTI and MR spectroscopy parameters was seen during the first 2 weeks after birth. Although the anatomic images were normal or nearly normal on the first 2 days after birth in most patients, abnormalities were detected on DTI (both visually and by quantitative interrogation of D(av) maps) and proton MR spectroscopy (abnormal metabolite ratios). These parameters tended to worsen until about day 5 and then normalize, though in several patients abnormal metabolite ratios persisted. Of interest, as areas of abnormal diffusivity pseudonormalized within one region of the brain they would develop in other areas. Therefore, the pattern of injury looked very different when imaging was performed at different times during this evolution. CONCLUSION: Patterns of injury detected by standard anatomic imaging sequences, DTI sequences, and proton MR spectroscopy varied considerably during the first 2 weeks after injury. The appearance of new areas of reduced diffusion simultaneous with the pseudonormalization of areas that had reduced diffusion at earlier times can result in an entirely different pattern of injury on diffusivity maps acquired at different time points. Awareness of these evolving patterns is essential if studies are performed and interpreted during this critical period of time.


Assuntos
Encefalopatias/diagnóstico , Lesões Encefálicas/diagnóstico , Imageamento por Ressonância Magnética , Espectroscopia de Ressonância Magnética , Feminino , Humanos , Recém-Nascido , Masculino , Estudos Prospectivos
20.
Rev. bras. ortop ; 37(10): 445-453, out. 2002. ilus, tab
Artigo em Português | LILACS | ID: lil-331632

RESUMO

Realizou-se um estudo retrospectivo e comparativo dos resultados obtidos em 63 pacientes que sofreram fratura da coluna toracolombar do tipo explosão, em T12, L1 e L2, dos quais 34 foram tratados pela técnica de Harrington e 29 receberam a fixação de Roy-Camille, sendo estas as técnicas hoje superadas. Em 48 deles havia indicação de descompressão medular, os outros 15 submeteram-se apenas à redução e fixação. Foram agrupadas as diferentes variáveis para análise da casuística. A fixação de Roy-Camille apresentou menor taxa de soltura de material de síntese, menor numero de pseudartrose, menor quebra de instrumental, menor redução do espaço discal e fixação mais curta. Evidenciou-se grande n£mero de complicações, justificando realmente a opção por instrumentação mais moderna e eficaz. Apesar das vantagens observadas com a fixação de Roy-Camille, os estudos bioestatísticos e comparativos das duas técnicas mostraram resultados satisfat¢rios para a época e sem importantes disparidades.


Assuntos
Humanos , Adulto , Fixação Interna de Fraturas , Traumatismos da Medula Espinal , Fraturas da Coluna Vertebral
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...