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1.
Lancet Oncol ; 24(5): e207-e218, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-37142382

RESUMO

Lung cancer screening with low-dose CT was recommended by the UK National Screening Committee (UKNSC) in September, 2022, on the basis of data from trials showing a reduction in lung cancer mortality. These trials provide sufficient evidence to show clinical efficacy, but further work is needed to prove deliverability in preparation for a national roll-out of the first major targeted screening programme. The UK has been world leading in addressing logistical issues with lung cancer screening through clinical trials, implementation pilots, and the National Health Service (NHS) England Targeted Lung Health Check Programme. In this Policy Review, we describe the consensus reached by a multiprofessional group of experts in lung cancer screening on the key requirements and priorities for effective implementation of a programme. We summarise the output from a round-table meeting of clinicians, behavioural scientists, stakeholder organisations, and representatives from NHS England, the UKNSC, and the four UK nations. This Policy Review will be an important tool in the ongoing expansion and evolution of an already successful programme, and provides a summary of UK expert opinion for consideration by those organising and delivering lung cancer screenings in other countries.


Assuntos
Neoplasias Pulmonares , Medicina Estatal , Humanos , Neoplasias Pulmonares/diagnóstico por imagem , Detecção Precoce de Câncer , Inglaterra , Pulmão
2.
Lancet Reg Health Eur ; 10: 100179, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34806061

RESUMO

BACKGROUND: The NLST reported a significant 20% reduction in lung cancer mortality with three annual low-dose CT (LDCT) screens and the Dutch-Belgian NELSON trial indicates a similar reduction. We present the results of the UKLS trial. METHODS: From October 2011 to February 2013, we randomly allocated 4 055 participants to either a single invitation to screening with LDCT or to no screening (usual care). Eligible participants (aged 50-75) had a risk score (LLPv2) ≥ 4.5% of developing lung cancer over five years. Data were collected on lung cancer cases to 31 December 2019 and deaths to 29 February 2020 through linkage to national registries. The primary outcome was mortality due to lung cancer. We included our results in a random-effects meta-analysis to provide a synthesis of the latest randomised trial evidence. FINDINGS: 1 987 participants in the intervention and 1 981 in the usual care arms were followed for a median of 7.3 years (IQR 7.1-7.6), 86 cancers were diagnosed in the LDCT arm and 75 in the control arm. 30 lung cancer deaths were reported in the screening arm, 46 in the control arm, (relative rate 0.65 [95% CI 0.41-1.02]; p=0.062). The meta-analysis indicated a significant reduction in lung cancer mortality with a pooled overall relative rate of 0.84 (95% CI 0.76-0.92) from nine eligible trials. INTERPRETATION: The UKLS trial of single LDCT indicates a reduction of lung cancer death of similar magnitude to the NELSON and NLST trials and was included in a meta-analysis of nine randomised trials which provides unequivocal support for lung cancer screening in identified risk groups. FUNDING: NIHR Health Technology Assessment programme; NIHR Policy Research programme; Roy Castle Lung Cancer Foundation.

3.
Lung Cancer ; 161: 136-140, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34583222

RESUMO

INTRODUCTION: Low-dose CT (LDCT) screening reduces lung cancer specific mortality. Several countries, including the UK, are evaluating the clinical impact and cost-effectiveness of LDCT screening using the latest evidence. In this paper we report baseline screening performance from five UK-based lung cancer screening programmes. METHODS: Data was collected at baseline from each screening programme. Measures of performance included prevalence of screen detected lung cancer, rate of surveillance imaging for indeterminate findings and surgical resection rates. Screening related harms were assessed by measuring false positive rates, number of invasive tests with associated complications in individuals without lung cancer and benign surgical resection rates. RESULTS: A total of 11,148 individuals had a baseline LDCT scan during the period of analysis (2011 to 2020). Overall, 84.7% (n = 9,440) of baseline LDCT scans were categorised as negative, 11.1% (n = 1,239) as indeterminate and 4.2% (n = 469) as positive. The prevalence of screen detected lung cancer was 2.2%, ranging between 1.8% and 4.4% for individual programmes. The surgical resection rate was 66% (range 46% to 83%) and post-surgical 90-day mortality for those with lung cancer 1.2% (n = 2/165). The false positive rate was 2% (n = 219/10,898) and of those with a positive result, one in two had lung cancer diagnosed (53.3%). An invasive test was required in 0.6% (n = 61/10,898) of screening attendees without lung cancer; there were no associated major complications or deaths. The benign surgical resection rate was 4.6% (n = 8/173), equating to 0.07% of the screened population. DISCUSSION: The performance of UK-based lung cancer screening programmes, delivered within or aligned to the National Health Service, compares favourably to published clinical trial data. Reported harms, including false positive and benign surgical resection rates are low. Ongoing monitoring of screening performance is vital to ensure standards are maintained and harms minimised.


Assuntos
Detecção Precoce de Câncer , Neoplasias Pulmonares , Humanos , Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/epidemiologia , Programas de Rastreamento , Medicina Estatal , Tomografia Computadorizada por Raios X , Reino Unido/epidemiologia
5.
Lung Cancer ; 134: 66-71, 2019 08.
Artigo em Inglês | MEDLINE | ID: mdl-31319997

RESUMO

OBJECTIVES: This Liverpool Healthy Lung Programme is a response to high rates of lung cancer and respiratory diseases locally and aims to diagnose lung cancer at an earlier stage by proactive approach to those at high risk of lung cancer. The objective of this study is to evaluate the programme in terms of its likely effect on mortality from lung cancer and its delivery to deprived populations. METHODS: Persons aged 58-75 years, with a history of smoking or a diagnosis of chronic obstructive pulmonary disease (COPD)2 according to general practice records were invited for lung health check in a community health hub setting. A detailed risk assessment and spirometry were performed in eligible patients. Those with a 5% or greater five-year risk of lung cancer were referred for a low dose CT3 scan. RESULTS: A total of 4 566 subjects attended the appointment for risk assessment and 3 591 (79%) consented to data sharing. More than 80% of the patients were in the most deprived quintile of the index of multiple deprivation. Of those attending, 63% underwent spirometry and 43% were recommended for a CT scan. A total of 25 cancers were diagnosed, of which 16 (64%) were stage I. Comparison with the national stage distribution implied that the programme was reducing lung cancer mortality by 22%. CONCLUSIONS: Community based proactive approaches to early diagnosis of lung cancer in health deprived regions are likely to be effective in early detection of lung cancer.


Assuntos
Serviços de Saúde Comunitária , Detecção Precoce de Câncer , Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/epidemiologia , Idoso , Serviços de Saúde Comunitária/métodos , Detecção Precoce de Câncer/métodos , Feminino , Disparidades em Assistência à Saúde , Humanos , Neoplasias Pulmonares/prevenção & controle , Masculino , Programas de Rastreamento , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Doença Pulmonar Obstrutiva Crônica/diagnóstico , Doença Pulmonar Obstrutiva Crônica/epidemiologia , Medição de Risco , Fatores de Risco , Fumar , Tomografia Computadorizada por Raios X , Reino Unido/epidemiologia
6.
Health Technol Assess ; 20(40): 1-146, 2016 05.
Artigo em Inglês | MEDLINE | ID: mdl-27224642

RESUMO

BACKGROUND: Lung cancer kills more people than any other cancer in the UK (5-year survival < 13%). Early diagnosis can save lives. The USA-based National Lung Cancer Screening Trial reported a 20% relative reduction in lung cancer mortality and 6.7% all-cause mortality in low-dose computed tomography (LDCT)-screened subjects. OBJECTIVES: To (1) analyse LDCT lung cancer screening in a high-risk UK population, determine optimum recruitment, screening, reading and care pathway strategies; and (2) assess the psychological consequences and the health-economic implications of screening. DESIGN: A pilot randomised controlled trial comparing intervention with usual care. A population-based risk questionnaire identified individuals who were at high risk of developing lung cancer (≥ 5% over 5 years). SETTING: Thoracic centres with expertise in lung cancer imaging, respiratory medicine, pathology and surgery: Liverpool Heart & Chest Hospital, Merseyside, and Papworth Hospital, Cambridgeshire. PARTICIPANTS: Individuals aged 50-75 years, at high risk of lung cancer, in the primary care trusts adjacent to the centres. INTERVENTIONS: A thoracic LDCT scan. Follow-up computed tomography (CT) scans as per protocol. Referral to multidisciplinary team clinics was determined by nodule size criteria. MAIN OUTCOME MEASURES: Population-based recruitment based on risk stratification; management of the trial through web-based database; optimal characteristics of CT scan readers (radiologists vs. radiographers); characterisation of CT-detected nodules utilising volumetric analysis; prevalence of lung cancer at baseline; sociodemographic factors affecting participation; psychosocial measures (cancer distress, anxiety, depression, decision satisfaction); and cost-effectiveness modelling. RESULTS: A total of 247,354 individuals were approached to take part in the trial; 30.7% responded positively to the screening invitation. Recruitment of participants resulted in 2028 in the CT arm and 2027 in the control arm. A total of 1994 participants underwent CT scanning: 42 participants (2.1%) were diagnosed with lung cancer; 36 out of 42 (85.7%) of the screen-detected cancers were identified as stage 1 or 2, and 35 (83.3%) underwent surgical resection as their primary treatment. Lung cancer was more common in the lowest socioeconomic group. Short-term adverse psychosocial consequences were observed in participants who were randomised to the intervention arm and in those who had a major lung abnormality detected, but these differences were modest and temporary. Rollout of screening as a service or design of a full trial would need to address issues of outreach. The health-economic analysis suggests that the intervention could be cost-effective but this needs to be confirmed using data on actual lung cancer mortality. CONCLUSIONS: The UK Lung Cancer Screening (UKLS) pilot was successfully undertaken with 4055 randomised individuals. The data from the UKLS provide evidence that adds to existing data to suggest that lung cancer screening in the UK could potentially be implemented in the 60-75 years age group, selected via the Liverpool Lung Project risk model version 2 and using CT volumetry-based management protocols. FUTURE WORK: The UKLS data will be pooled with the NELSON (Nederlands Leuvens Longkanker Screenings Onderzoek: Dutch-Belgian Randomised Lung Cancer Screening Trial) and other European Union trials in 2017 which will provide European mortality and cost-effectiveness data. For now, there is a clear need for mortality results from other trials and further research to identify optimal methods of implementation and delivery. Strategies for increasing uptake and providing support for underserved groups will be key to implementation. TRIAL REGISTRATION: Current Controlled Trials ISRCTN78513845. FUNDING: This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 20, No. 40. See the NIHR Journals Library website for further project information.


Assuntos
Detecção Precoce de Câncer/métodos , Detecção Precoce de Câncer/psicologia , Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/psicologia , Tomografia Computadorizada por Raios X/métodos , Idoso , Análise Custo-Benefício , Detecção Precoce de Câncer/economia , Feminino , Humanos , Neoplasias Pulmonares/diagnóstico por imagem , Neoplasias Pulmonares/patologia , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Projetos Piloto , Anos de Vida Ajustados por Qualidade de Vida , Doses de Radiação , Fatores de Risco , Fatores Socioeconômicos , Tomografia Computadorizada por Raios X/economia , Reino Unido
7.
Cancer Prev Res (Phila) ; 7(3): 362-71, 2014 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24441672

RESUMO

UNLABELLED: The UK Lung Cancer Screening trial (UKLS) aims to evaluate low-dose computed tomography (LDCT) lung cancer population screening in the United Kingdom. In UKLS, a large population sample ages 50 to 75 years is approached with a questionnaire to determine lung cancer risk. Those with an estimated risk of at least 5% of developing lung cancer in the next 5 years (using the Liverpool Lung project risk model) are invited to participate in the trial. Here, we present demographic, risk, and response rate data from the first 88,897 individuals approached. Of note, 23,794 individuals (26.8% of all approached) responded positively to the initial questionnaire; 12% of these were high risk. Higher socioeconomic status correlated positively with response, but inversely with risk (P < 0.001). The 50- to 55-year age group was least likely to participate, and at lowest cancer risk. Only 5% of clinic attendees were ages ≤60 years (compared with 47% of all 88,897 approached); this has implications for cost effectiveness. Among positive responders, there were more ex-smokers than expected from population figures (40% vs. 33%), and fewer current smokers (14% vs. 17.5%). Of note, 32.7% of current smokers and 18.4% of ex-smokers were designated as high risk. Overall, 1,452 of 23,794 positive responders (6.1%) were deemed high risk and attended a recruitment clinic. UKLS is the first LDCT population screening trial, selecting high-risk subjects using a validated individual risk prediction model. KEY FINDINGS: (i) better recruitment from ex- rather than current smokers, (ii) few clinic attendees ages early 50s, and (iii) representative number of socioeconomically deprived people recruited, despite lower response rates.


Assuntos
Detecção Precoce de Câncer/estatística & dados numéricos , Detecção Precoce de Câncer/normas , Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/epidemiologia , Guias de Prática Clínica como Assunto , Idoso , Feminino , Seguimentos , Humanos , Masculino , Programas de Rastreamento/normas , Programas de Rastreamento/estatística & dados numéricos , Pessoa de Meia-Idade , Classe Social , Inquéritos e Questionários , Reino Unido/epidemiologia
9.
JRSM Short Rep ; 3(2): 12, 2012 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22393473

RESUMO

OBJECTIVES: To assess the impact on health-related quality of life (HRQoL) in adult cystic fibrosis (CF) patients of chronic infection with the Liverpool Epidemic Strain (LES) of Pseudomonas aeruginosa (Psa). DESIGN: Cohort study. PARTICIPANTS: Adult CF patients attending a single CF centre. SETTING: Outpatient clinic. MAIN OUTCOME MEASURES: HRQoL measures of adult CF patients chronically infected with LES and Psa strains measured by CFQ-UK. RESULTS: Patients infected by transmissible Psa strains had worse physical functioning, respiratory symptoms, treatment burden, vitality, role, health perception and emotion than those with unique Psa strains (P < 0.01), and significantly poorer physical functioning, respiratory symptoms, treatment burden, body image, weight, role, and emotion than those without any Psa infection (P < 0.05). Furthermore, in a matched cohort of 39 patients, those with LES infection reported significantly worse physical functioning, treatment burden, respiratory symptoms and health perception than those with unique Psa infection (P < 0.02). CONCLUSION: Chronic infection with transmissible Psa strains, particularly LES, confers a worse quality of life in adult CF patients. Coupled with the established poorer clinical outcome, this reinforces the need to prevent the spread of such strains in CF community.

10.
J Cyst Fibros ; 11(3): 173-9, 2012 May.
Artigo em Inglês | MEDLINE | ID: mdl-22146482

RESUMO

BACKGROUND: Transmissible Pseudomonas aeruginosa (Psa) strains such as the Liverpool Epidemic Strain (LES) are now widespread throughout UK CF clinics: their susceptibility to antibiotics is therefore important. To study this, we compared antibiogram patterns of Psa strains in our CF clinic over 5 years, looking at differences in resistance patterns between strains and changes to these over time. METHODS: The antibiograms of sputum samples between 2004 and 2008 from patients attending our centre were included. We compared Psa isolate antibiotic resistance (to six anti-pseudomonal antibiotics) patterns for patients infected with LES with those infected with other Psa strains, both in the total population in 2004 (125 patients) and 2008 (166 patients) and also longitudinally from annual review samples 2004 to 2008 in matched and unmatched patient groups. RESULTS: LES exhibited significantly more resistant isolates in 2004 (p<0.0001). There was an increase in antibiotic resistance in both LES and other Psa strains over time (p<0.001). Cox proportional hazards analysis of both unmatched (n=125) and matched (n=56) patients in 2004 revealed that LES infected patients were more likely to develop antibiotic resistant isolates over time (hazard ratio 8.1, p<0.001). Fewer LES isolates were classed as fully sensitive in both matched and unmatched groups at the end of study period (p<0.001). CONCLUSION: This study shows a worrying trend in antibiotic resistance in the Psa isolates amongst patients chronically infected with LES. This highlights the need to prevent cross infection through segregation and also the need to develop new strategies to treat these organisms.


Assuntos
Antibacterianos/farmacologia , Fibrose Cística/epidemiologia , Farmacorresistência Bacteriana , Epidemias , Infecções por Pseudomonas/epidemiologia , Pseudomonas aeruginosa/efeitos dos fármacos , Adulto , Fibrose Cística/complicações , Fibrose Cística/microbiologia , Feminino , Seguimentos , Humanos , Masculino , Testes de Sensibilidade Microbiana , Infecções por Pseudomonas/complicações , Infecções por Pseudomonas/microbiologia , Pseudomonas aeruginosa/isolamento & purificação , Estudos Retrospectivos , Escarro/microbiologia , Fatores de Tempo , Reino Unido/epidemiologia , Adulto Jovem
11.
Radiol. bras ; 44(5): 279-282, set.-out. 2011. tab
Artigo em Inglês | LILACS | ID: lil-612928

RESUMO

OBJECTIVE: The main utility of 18-fluorodeoxyglucose positron emission tomography (FDG-PET) lies in the staging of lung cancer. However, it can also be used to differentiate indeterminate pulmonary lesions, but its impact on the resection of benign lesions at surgery is unknown. The aim of this study was to compare the prevalence of benign lesions at thoracotomy carried out for suspected lung cancer, before and after the introduction of PET scanning in a large thoracic surgical centre. MATERIALS AND METHODS: We reviewed our prospectively recorded surgical database for all consecutive patients undergoing thoracotomy for suspected or proven lung cancer and compared the prevalence of benign lesions in 2 consecutive 2-year groups, before (group I) and after (group II) the introduction of FDG-PET scan respectively. RESULTS: Surgical resection was performed on 1233 patients during the study period. The prevalence of benign lesions at surgery in groups I and II was similar (44/626 and 41/607, both 7 percent), and also in group II between those who underwent FDG-PET scan and the remainder (21/301 and 20/306 respectively, both 7 percent). In group II, of the 21 patients with benign lesions, who underwent FDG-PET, 19 had a false positive scan (mean standardised uptake value 5.3 [range 2.6-12.7]). Of these, 13 and 4 patients respectively had non-diagnostic bronchoscopy and percutaneous transthoracic lung biopsy pre thoracotomy. There was no difference in the proportion of different benign lesions resected between group I and those with FDG-PET in group II. CONCLUSION: The introduction of FDG-PET scanning has not altered the proportion of patients undergoing thoracotomy for ultimately benign lesions, mainly due to the avidity for the isotope of some non-malignant lesions. Such false positive results need to be considered when patients with unconfirmed lung cancer are contemplated for surgical resection.


OBJETIVO: A principal utilidade da tomografia por emissão de pósitrons com 18-fluordeoxiglicose (FDG-PET) está no estadiamento do câncer de pulmão. Porém, ela também pode ser utilizada para diferenciar lesões pulmonares indeterminadas, mas seu impacto na ressecção cirúrgica de lesões benignas é desconhecido. O objetivo deste estudo foi comparar a prevalência de lesões benignas em toracotomias feitas por suspeição de câncer de pulmão, antes e após a introdução do FDG-PET, em um centro de referência de cirurgia torácica. MATERIAIS E MÉTODOS: Os autores analisaram, prospectivamente, uma base de dados cirúrgicos de todos os pacientes consecutivos submetidos a toracotomia por câncer de pulmão suspeito ou comprovado e compararam a prevalência de lesões benignas em dois grupos ao longo de dois anos consecutivos, respectivamente antes (grupo I) e depois (grupo II) da introdução da FDG-PET. RESULTADOS: Ressecção cirúrgica foi feita em 1.233 pacientes durante o período do estudo. A prevalência de lesões benignas na cirurgia nos grupos I e II foi similar (44/626 e 41/607, ambas correspondendo a 7 por cento), e também no grupo II, entre aqueles submetidos a FDG-PET e os restantes (21/301 e 20/306 respectivamente, ambos correspondendo a 7 por cento). No grupo II, dos 21 pacientes com lesões benignas submetidos a FDG-PET, 19 tiveram um estudo falso-positivo (valor médio padrão de captação 5.3 [faixa 2.6-12.7]). Desses, respectivamente 13 e 4 pacientes tiveram broncoscopia não diagnóstica e biópsia transtorácica percutânea de pulmão antes da toracotomia. Não houve diferença na proporção de lesões benignas diferentes ressecadas entre o grupo I e aqueles submetidos a FDG-PET no grupo II. CONCLUSÃO:A introdução da FDG-PET não alterou a proporção de pacientes submetidos a toracotomia por lesões benignas, principalmente devido à avidez pelo isótopo de algumas lesões não malignas. Tais resultados falsos-positivos devem ser considerados nos casos em que se contempla a possibilidade de ressecção cirúrgica em pacientes com câncer de pulmão não confirmado.


Assuntos
Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Granuloma , Hamartoma , Neoplasias Pulmonares , Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/patologia , Imagem Multimodal , Estadiamento de Neoplasias , Estudos Prospectivos , Pulmão/patologia
12.
Am J Respir Crit Care Med ; 183(12): 1674-9, 2011 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-21297072

RESUMO

RATIONALE: Pseudomonas aeruginosa isolates from chronic cystic fibrosis lung infections display multiple phenotypes indicating extensive population diversity. OBJECTIVES: We aimed to examine how such diversity is distributed within and between patients, and to study the dynamics of single-strain phenotypic diversity in multiple patients through time. METHODS: Sets of 40 P. aeruginosa isolates per sputum samples were analyzed for a series of phenotypic and genotypic characteristics. Population differentiation between patients, between samples within patients, and between isolates within samples was analyzed. MEASUREMENTS AND MAIN RESULTS: We characterized 15 traits for a total of 1,720 isolates of an important and widely disseminated epidemic strain of P. aeruginosa from 10 chronically infected patients with cystic fibrosis multiply sampled during 2009. Overall, 43 sputum samples were analyzed and 398 haplotypes of the Liverpool Epidemic Strain were identified. The majority of phenotypic diversity occurred within patients. Such diversity is highly dynamic, displaying rapid turnover of haplotypes through time. P. aeruginosa populations within each individual sputum sample harbored extensive diversity. Although we observed major changes in the haplotype composition within patients between samples taken at intervals of several months, the compositions varied much less during exacerbation periods, despite the use of intravenous antibiotics. Our data also highlight a correlation between periods of pulmonary exacerbation and the overproduction of pyocyanin, a quorum sensing-controlled virulence factor. CONCLUSIONS: These results significantly advance our understanding of the within-host population biology of P. aeruginosa during infection of patients with cystic fibrosis, and provide in vivo evidence for a link between pyocyanin production and patient morbidity.


Assuntos
Fibrose Cística/microbiologia , Pneumopatias/microbiologia , Infecções por Pseudomonas/microbiologia , Pseudomonas aeruginosa/isolamento & purificação , Adulto , Doença Crônica , Fibrose Cística/complicações , Feminino , Variação Genética , Haplótipos , Humanos , Masculino , Fenótipo , Polimorfismo de Nucleotídeo Único , Pseudomonas aeruginosa/genética , Pseudomonas aeruginosa/metabolismo , Piocianina/biossíntese , Escarro/microbiologia
13.
Antimicrob Agents Chemother ; 55(1): 426-8, 2011 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-20974862

RESUMO

Phage production in response to antibiotics varied among four isolates of a Pseudomonas aeruginosa cystic fibrosis (CF) epidemic strain. Whereas ciprofloxacin induced higher levels of phage production, other CF-relevant antibiotics led to reduced production. We detected free phages directly in CF patient sputum samples by both plaque (40% positive) and PCR (76% positive) assays. Our observations suggest that the choice of antibiotics could influence the number of free phages within the CF lung environment.


Assuntos
Bacteriófagos/efeitos dos fármacos , Fibrose Cística/microbiologia , Pseudomonas aeruginosa/efeitos dos fármacos , Pseudomonas aeruginosa/virologia , Bacteriófagos/genética , Humanos , Reação em Cadeia da Polimerase , Pseudomonas aeruginosa/patogenicidade
14.
Health Soc Care Community ; 18(6): 653-61, 2010 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-20584088

RESUMO

The issue of self-care is becoming increasingly central to both policy and practice in health and social care in the community. It is imperative therefore that research in this important area is drawn together and presented coherently so as to ensure that change can be informed by evidence and implemented sensitively. As cystic fibrosis (CF) has until recently been regarded as a paediatric condition, there is relatively little research that focuses on the self-care of adults. Although not entirely uncritical of traditional biomedicine, these studies focus on individual patient deficits and are directed primarily at facilitating their 'compliance'. After discussing some important methodological, evidential and theoretical limitations of this research, other recent CF literature will be considered that suggests the possibility of developing a 'social model' for self-care research. The proposed model is more pluralistic and less prescriptive than its predecessors and the resulting 'types' of self-care indicate that both old and new, mainstream and marginal discourses should co-exist. Indeed, recognising the legitimacy of distinct varieties of self-care not only guards against unwarranted moralising and pathologising but may also enable self-care support to be negotiated and tailored more appropriately.


Assuntos
Fibrose Cística/terapia , Assistência ao Paciente/métodos , Autocuidado/métodos , Adulto , Fatores Etários , Doença Crônica , Humanos , Modelos Psicológicos , Reino Unido
16.
J Clin Microbiol ; 48(6): 2053-9, 2010 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-20410349

RESUMO

The Liverpool epidemic strain (LES) of Pseudomonas aeruginosa is widespread among cystic fibrosis (CF) patients in the United Kingdom and has emerged recently in North America. In this study, we report the analysis of 24 "anomalous" CF isolates of P. aeruginosa that produced inconsistent results with regard to either pulsed-field gel electrophoresis (PFGE) or PCR tests for the LES. We used a new typing method, the ArrayTube genotyping system, to determine that of the 24 anomalous isolates tested, 13 were confirmed as the LES. LES isolates could not be clearly distinguished from non-LES isolates by two other commonly used genetic fingerprinting tests, randomly amplified polymorphic DNA (RAPD) analysis and BOX-PCR, and varied considerably in their carriage of LES genomic islands and prophages. The genomic instability of the LES suggests that identification of this emerging transmissible strain could be a challenging task, and it questions whether discrimination is always a desirable feature of bacterial typing methods in the context of chronic CF infections.


Assuntos
Técnicas de Tipagem Bacteriana , Fibrose Cística/complicações , Impressões Digitais de DNA/métodos , Instabilidade Genômica , Infecções por Pseudomonas/microbiologia , Pseudomonas aeruginosa/classificação , Pseudomonas aeruginosa/genética , Eletroforese em Gel de Campo Pulsado , Genótipo , Humanos , Epidemiologia Molecular/métodos , América do Norte , Infecções por Pseudomonas/epidemiologia , Pseudomonas aeruginosa/isolamento & purificação , Técnica de Amplificação ao Acaso de DNA Polimórfico , Reino Unido
17.
J Med Microbiol ; 59(Pt 5): 614-616, 2010 May.
Artigo em Inglês | MEDLINE | ID: mdl-20133415

RESUMO

Chronic pulmonary infection with Pseudomonas aeruginosa occurs in up to 85 % of individuals with cystic fibrosis (CF) by the time they reach adulthood, and is the major cause of morbidity and mortality: nearly all patients die from progressive respiratory failure due to repeated pulmonary exacerbations. However, despite the predilection of this organism for the lungs of CF people, infection of the pleura is much less common and is not well described in the CF population. We describe what is believed to be the first case of pleural empyema due to a particularly pathogenic transmissible strain of P. aeruginosa (the Liverpool epidemic strain) in an adult CF patient.


Assuntos
Fibrose Cística/complicações , Empiema/diagnóstico , Infecções por Pseudomonas/diagnóstico , Pseudomonas aeruginosa/isolamento & purificação , Adulto , Empiema/microbiologia , Feminino , Humanos , Infecções por Pseudomonas/microbiologia , Radiografia Torácica , Reino Unido
18.
J Med Microbiol ; 59(Pt 4): 472-481, 2010 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-20019149

RESUMO

Chronic respiratory infection by Pseudomonas aeruginosa contributes significantly to the morbidity and mortality associated with cystic fibrosis (CF). Using a series of phenotypic and genotypic tests on collections of 40 isolates per sputum sample, we analysed fluctuations within sputum populations of the P. aeruginosa Liverpool epidemic strain (LES) during pulmonary exacerbations. For each of three patients, three sequential sputum samples were analysed: (1) on presentation with exacerbation at the Regional Adult Cystic Fibrosis Unit, Liverpool; (2) a few days into intravenous antibiotic treatment; (3) when the patient had recovered. Fluctuations were observed in morphotype distribution, the production of virulence-associated quorum-sensing-dependent exoproducts (the phenazine compound pyocyanin and the elastase LasA), antibiotic susceptibility profiles and levels of auxotrophy. PCR assays were used to screen isolates for the presence of novel regions of the LES genome (islands and prophages) and to detect free phages. In one patient there was an increase in the prevalence of the LESGI-5 genomic island during the sampling period from 10 to 97.5 % carriage. LES phages 2-4 were detected in either the majority or all sputum samples tested, indicating widespread phage activity during the sampling period. The results of this study are indicative that significant fluctuations occur within P. aeruginosa populations during short periods of pulmonary exacerbation and intravenous antibiotic therapy.


Assuntos
Fibrose Cística/microbiologia , Pulmão/microbiologia , Pseudomonas aeruginosa/classificação , Adulto , Bacteriófagos/isolamento & purificação , Ciprofloxacina/farmacologia , Farmacorresistência Bacteriana , Genótipo , Humanos , Testes de Sensibilidade Microbiana , Fenótipo , Pseudomonas aeruginosa/efeitos dos fármacos , Pseudomonas aeruginosa/virologia , Escarro/microbiologia
19.
J Bras Pneumol ; 35(2): 194-6, 2009 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-19287925

RESUMO

Pneumothorax is a common complication in cystic fibrosis and is associated with worsening of lung function. However, bilateral simultaneous pneumothorax in cystic fibrosis is a rare condition. We describe the case of a 17-year-old female with cystic fibrosis who presented with spontaneous pneumothorax. Clinically, she presented right-sided chest pain and progressive breathlessness. The pneumothorax failed to resolve after the initial treatment (chest drainage). However, the patient was later successfully treated with additional chest drainage and talc pleurodesis. We also discuss the etiology and management of pneumothorax in patients with cystic fibrosis, since pneumothorax is associated with increased morbidity and mortality among such patients.


Assuntos
Fibrose Cística/complicações , Pneumotórax/etiologia , Adolescente , Fibrose Cística/diagnóstico por imagem , Drenagem , Feminino , Humanos , Pneumotórax/diagnóstico por imagem , Pneumotórax/terapia , Radiografia
20.
J. bras. pneumol ; 35(2): 194-196, fev. 2009. ilus
Artigo em Inglês, Português | LILACS | ID: lil-507338

RESUMO

Pneumothorax is a common complication in cystic fibrosis and is associated with worsening of lung function. However, bilateral simultaneous pneumothorax in cystic fibrosis is a rare condition. We describe the case of a 17-year-old female with cystic fibrosis who presented with spontaneous pneumothorax. Clinically, she presented right-sided chest pain and progressive breathlessness. The pneumothorax failed to resolve after the initial treatment (chest drainage). However, the patient was later successfully treated with additional chest drainage and talc pleurodesis. We also discuss the etiology and management of pneumothorax in patients with cystic fibrosis, since pneumothorax is associated with increased morbidity and mortality among such patients.


O pneumotórax é uma complicação comum na fibrose cística e está associado com a piora da função pulmonar. Entretanto, o pneumotórax simultâneo bilateral na fibrose cística é um achado raro. Nesse artigo é descrito o caso de uma paciente de 17 anos com fibrose cística que cursou com pneumotórax espontâneo simultâneo bilateral. Clinicamente ela apresentou dor torácica à direita e dificuldade respiratória progressiva. Embora o pneumotórax não tenha respondido bem ao tratamento inicial (drenagem torácica), ela foi posteriormente tratada com drenagem e pleurodese com talco, com sucesso. São discutidos também a etiologia e a conduta nesta condição, que está associada com o aumento da morbidade e mortalidade.


Assuntos
Adolescente , Feminino , Humanos , Fibrose Cística/complicações , Pneumotórax/etiologia , Fibrose Cística , Drenagem , Pneumotórax , Pneumotórax/terapia
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