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BACKGROUND: The accurate detection of multidrug-resistant tuberculosis (MDR-TB) is critical for the application of appropriate patient treatment and prevention of transmission of drug-resistant Mycobacterium tuberculosis isolates. The goal of this study was to evaluate the correlation between phenotypic and molecular techniques for drug-resistant tuberculosis diagnostics. Molecular techniques used were the line probe assay genotype MTBDRplus and the recently described tuberculosis-spoligo-rifampin-isoniazid typing (TB-SPRINT) bead-based assay. Conventional drug susceptibility testing (DST) was done on a BACTECTM MGIT 960 TB. METHOD: We studied 80 M. tuberculosis complex (MTC) clinical isolates from Minas Gerais state, of which conventional DST had classified 60 isolates as MDR and 20 as drug susceptible. FINDINGS: Among the 60 MDR-TB isolates with MGIT as a reference, sensitivity, specificity, accuracy, and kappa for rifampicin (RIF) resistance using TB-SPRINT and MTBDRplus, were 96.7% versus 93.3%, 100.0% versus 100.0%, 97.5% versus 95.0% and 0.94 versus 0.88, respectively. Similarly, the sensitivity, specificity, accuracy, and kappa for isoniazid (INH) resistance were 85.0% and 83.3%, 100.0% and 100.0%, 88.8% and 87.5% and 0.74 and 0.71 for both tests, respectively. Finally, the sensitivity, specificity, accuracy, and kappa for MDR-TB were 85.0% and 83.3%, 100.0% and 100.0%, 88.8% and 87.5% and 0.74 and 0.71 for both tests, respectively. MAIN CONCLUSIONS: Both methods exhibited a good correlation with the conventional DST. We suggest estimating the cost-effectiveness of MTBDRplus and TB-SPRINT in Brazil.
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Técnicas Bacteriológicas/métodos , Mycobacterium tuberculosis/genética , Tuberculose Resistente a Múltiplos Medicamentos/diagnóstico , Brasil , Genótipo , Humanos , Técnicas de Diagnóstico Molecular , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Tuberculose Resistente a Múltiplos Medicamentos/microbiologiaRESUMO
BACKGROUND: We aimed to characterize the genetic diversity of drug-resistant Mycobacterium tuberculosis (MTb) clinical isolates and investigate the molecular epidemiology of multidrug-resistant (MDR) tuberculosis from Minas Gerais State, Brazil. METHODS: One hundred and four MTb clinical isolates were assessed by IS6110-RFLP, 24-locus mycobacterial interspersed repetitive units variable-number tandem repeats (MIRU-VNTR), TB-SPRINT (simultaneous spoligotyping and rifampicin-isoniazid drug-resistance mutation analysis) and 3R-SNP-typing (analysis of single-nucleotide polymorphisms in the genes involved in replication, recombination and repair functions). RESULTS: Fifty-seven different IS6110-RFLP patterns were found, among which 50 had unique patterns and 17 were grouped into seven clusters. The discriminatory index (Hunter and Gaston, HGDI) for RFLP was 0.9937. Ninety-nine different MIRU-VNTR patterns were found, 95 of which had unique patterns and nine isolates were grouped into four clusters. The major allelic diversity index in the MIRU-VNTR loci ranged from 0.6568 to 0.7789. The global HGDI for MIRU-VNTR was 0.9991. Thirty-two different spoligotyping profiles were found: 16 unique patterns (n = 16) and 16 clustered profiles (n = 88). The HGDI for spoligotyping was 0.9009. The spoligotyped clinical isolates were phylogenetically classified into Latin-American Mediterranean (66.34 %), T (14.42 %), Haarlem (5.76 %), X (1.92 %), S (1.92 %) and U (unknown profile; 8.65 %). Among the U isolates, 77.8 % were classified further by 3R-SNP-typing as 44.5 % Haarlem and 33.3 % LAM, while the 22.2 % remaining were not classified. Among the 104 clinical isolates, 86 were identified by TB-SPRINT as MDR, 12 were resistant to rifampicin only, one was resistant to isoniazid only, three were susceptible to both drugs, and two were not successfully amplified by PCR. A total of 42, 28 and eight isolates had mutations in rpoB positions 531, 526 and 516, respectively. Correlating the cluster analysis with the patient data did not suggest recent transmission of MDR-TB. CONCLUSIONS: Although our results do not suggest strong transmission of MDR-TB in Minas Gerais (using a classical 100 % MDR-TB identical isolates cluster definition), use of a smoother cluster definition (>85 % similarity) does not allow us to fully eliminate this possibility; hence, around 20-30 % of the isolates we analyzed might be MDR-TB transmission cases.
Assuntos
Variação Genética , Mycobacterium tuberculosis/genética , Tuberculose Resistente a Múltiplos Medicamentos/epidemiologia , Alelos , Antituberculosos/uso terapêutico , Proteínas de Bactérias/genética , Brasil/epidemiologia , Análise por Conglomerados , DNA Bacteriano/análise , RNA Polimerases Dirigidas por DNA , Genótipo , Humanos , Isoniazida/uso terapêutico , Repetições Minissatélites/genética , Mycobacterium tuberculosis/classificação , Mycobacterium tuberculosis/isolamento & purificação , Filogenia , Reação em Cadeia da Polimerase , Polimorfismo Genético , Rifampina/uso terapêutico , Tuberculose Resistente a Múltiplos Medicamentos/tratamento farmacológico , Tuberculose Resistente a Múltiplos Medicamentos/microbiologiaRESUMO
The possibility to obtain DNA from smears is a valuable alternative to remedy the lack of samples when they are totally used for bacilloscopy; this technique solves the biosafety problem related to a possible accident with the transportation of flasks containing potentially transmissible clinical samples. Hence, the purpose of this study was to utilize the insertion sequence IS6110 for amplification of DNA from a smear-positive sample for tuberculosis (TB) diagnosis. Among the 52 positive bacilloscopies, sensitivity, specificity, positive predictive value and negative predictive value were 52.3%, 100%, 100% and 89.7%, respectively whereas accuracy was 90.7%. The IS6110-based PCR for TB diagnosis developed in DNA extracted from a positive smear is a fast, simple, specific, and safe method.
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Mycobacterium tuberculosis/genética , Tuberculose/diagnóstico , DNA Bacteriano/isolamento & purificação , Humanos , Reação em Cadeia da Polimerase , Segurança , Manejo de EspécimesRESUMO
(1) Background: Infection with the Human Immunodeficiency Virus (HIV) is a significant challenge for tuberculosis (TB) control, with increasing mortality rates worldwide. Moreover, the loss to follow-up is very high, with low adherence to treatment, resulting in unfavorable endpoints. This study aimed to analyze the effectiveness of TB treatment in patients coinfected with HIV/AIDS and its associated factors. (2) Methods: Patients coinfected with TB and HIV/AIDS at a Reference Hospital for infectious diseases were followed up for a maximum of one year from the start of TB treatment until cure or censorship (death, abandonment, and transfer) from 2015 to 2019. The Cox proportional model was used to identify risk factors for effectiveness. (3) Results: Of the 244 patients included in the cohort, 58.2% (142/244) had no treatment effectiveness, 12.3% (30/244) died, and 11.1% (27/244) abandoned treatment. Viral suppression at the onset of TB treatment (HR = 1.961, CI = 1.123-3.422), previous use of Antiretroviral Therapy (HR = 1.676, CI = 1.060-2.651), new cases (HR = 2.407, CI = 1.197-3.501), not using illicit drugs (HR = 1.763, CI = 1.141-2.723), and using the basic TB regimen (HR = 1.864, CI = 1.084-3.205) were significant variables per the multivariate Cox regression analysis. (4) Conclusion: TB treatment for most TB patients coinfected with HIV/AIDS was not effective. This study identified that an undetectable viral load at the beginning of the disease, previous use of ART, not using illicit drugs and not having previously taken anti-TB treatment are factors associated with successful TB treatment.
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The incidence and clinical characteristics of NTM diseases in Brazil remain relatively unknown. The present study describes the diagnosis of NTM isolates, the clinical presentation and treatment outcomes. We analyzed NTM isolates in patients of a tertiary hospital in the Southeast region of Brazil, from January 2008 to July 2019. The ATS/IDSA criteria for diagnosis and treatment of these patients was applied. Mycobacterium kansasii were identified in 13/113 (11.5%) patients. In 59/113 (52.2%) patients who met the ATS criteria for disease, 29/59 (49.1%) received treatment, and 22/29 (75.8%) were cured. The major species identified was M. kansasii. The most frequent symptoms among the treated patients were dyspnea and cough, and the proportion of cured patients was high.
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Infecções por Mycobacterium não Tuberculosas , Micobactérias não Tuberculosas , Humanos , Infecções por Mycobacterium não Tuberculosas/diagnóstico , Infecções por Mycobacterium não Tuberculosas/tratamento farmacológico , Infecções por Mycobacterium não Tuberculosas/epidemiologia , Tosse , Dispneia , Hospitais , Estudos RetrospectivosRESUMO
Tuberculosis (TB) and human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) pharmacotherapy and the stigma related to both diseases are complex. The patients' subjective experiences with diseases and medications are of utmost importance in pharmaceutical care practice. This study aimed to understand the subjective medication experience of TB and HIV/AIDS coinfected patients. The study was based on descriptive research of a qualitative and quantitative nature using data collected during pharmaceutical care appointments and from medical records from September 2015 to December 2016 at a tertiary infectious diseases referral hospital in Southeastern Brazil. Data from 81 patients were analyzed. Regarding patient subjective medication experience, the following responses to the quantitative questionnaire were most frequent: preference for a route of administration (12.4%) and for non-pharmacological therapy (50.6%); concerns about price (11.1%) and adverse effects (18.5%); and association of a worsening of their health status with a change in medication dosage (23.5%). In the thematic analysis, adversity and socially constructed aspects were more prominent. Resolvability, associated with the patient's understanding of relief from signs and symptoms and health recovery, was observed; however, feelings of ambivalence permeated the other aspects, hence leading to treatment abandonment. The evaluation of patient medication experience can be a path to understanding and intervening in the phenomenon of treatment abandonment among TB and HIV/AIDS coinfected individuals.
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Síndrome da Imunodeficiência Adquirida , Coinfecção , Infecções por HIV , Tuberculose , Humanos , Infecções por HIV/tratamento farmacológico , Infecções por HIV/complicações , Coinfecção/tratamento farmacológico , Tuberculose/tratamento farmacológico , Tuberculose/complicações , Pesquisa QualitativaRESUMO
We performed spoligotyping on 114 strains of the Mycobacterium tuberculosis (Mtb) complex that had been isolated from patients in Minas Gerais Health Units during 2004. A total of 82/114 (72%) clinical isolates were clustered and 32/114 (28%) were unique. Seven shared types containing nine strains were newly created. A total of nine patterns corresponded to unreported orphan strains, as evaluated against all of the strains recorded in the SITVIT2 proprietary database in the Institut Pasteur de la Guadeloupe. The major clades were composed of isolates that belong to the following genotypes: Latin-America and Mediterranean (63/114, 55.3%) (the ill-defined T superfamily) (12/114, 10.5%), Haarlem (8/114, 7%), X clade (6/114, 5.3%), S clade (3/114, 2.6%) and the East-African Indian and Manu types, each with 1/114 (0.9%) isolates. A considerable number of strains (n = 20, 17.5%) showed patterns that did not fall within any of the previously described major clades. We conclude the bulk of tuberculosis (TB) (92/114, 80.7%) in our location is recent evolutionary strains that belong to the principal genetic groups 2/3. Further studies on epidemiology of TB are required to understand Mtb biodiversity and TB transmission in this region.
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Técnicas de Tipagem Bacteriana/métodos , Mycobacterium tuberculosis/genética , Análise por Conglomerados , Feminino , Genótipo , Humanos , Masculino , Mycobacterium tuberculosis/classificação , Mycobacterium tuberculosis/isolamento & purificaçãoRESUMO
The World Health Organization highlights the importance of health services organization and performance in tuberculosis (TB) control activities. This study aimed to assess the performance of primary healthcare services in Belo Horizonte, Minas Gerais State, Brazil, in TB control activities in the dimensions Structure and Process, before and after the use of a validated instrument called Stratification by Degree of Clinical Risk and Tuberculosis Treatment Dropout (ERTB). This was a descriptive and prospective study with two interviews (455 professionals), the second of which after the ERTB. Performance classification was: ≤ 49.9%, critical; 50-79.9%, unsatisfactory, and ≥ 80%, satisfactory. The comparative assessment used the McNemar statistical test with p < 0.05. After risk stratification, most of the variables in each dimension improved significantly. The authors conclude that it was possible to identify satisfactory performance in most of the variables assessed in the Structure and Process dimensions in primary healthcare services in Belo Horizonte in relation to TB control activities, using a standardized questionnaire.
A Organização Mundial da Saúde destaca a importância da organização e do desempenho dos serviços de saúde nas ações de controle da tuberculose. O objetivo deste estudo foi avaliar o desempenho dos serviços de atenção primaria à saúde em Belo Horizonte, Minas Gerais, Brasil, em relação às ações de controle da tuberculose nos eixos Estrutura e Processo, antes e após a utilização do instrumento validado denominado Estratificação por Grau de Risco Clínico e de Abandono do Tratamento da Tuberculose (ERTB). Estudo descritivo e prospectivo, no qual foram realizadas duas entrevistas (455 profissionais), tendo a segunda ocorrido após a ERTB. A classificação do desempenho seguiu os valores: ≤ 49,9%, críticos; entre 50% e 79,9%, insatisfatórios; e, ≥ 80%, satisfatórios. Na avaliação comparativa, foi utilizado o teste estatístico de McNemar, com p < 0,05. Após a estratificação de risco, a maior parte das variáveis de cada eixo melhorou significativamente. Nós concluímos que, por meio de um questionário padronizado, foi possível identificar o desempenho satisfatório dos serviços de atenção primária à saúde em Belo Horizonte em relação às ações de controle da tuberculose, na maioria das variáveis avaliadas nos eixos Estrutura e Processo.
La Organización Mundial de la Salud destaca la importancia de la organización y del desempeño de los servicios de salud en acciones de control de la tuberculosis. El objetivo de este estudio fue evaluar el desempeño de los servicios de atención primaria en salud en Belo Horizonte, Minas Gerais, Brasil, en relación con las acciones de control de la tuberculosis respecto a los ejes Estructura y Proceso, antes y después de la utilización del instrumento validado, denominado Estratificación por Grado de Riesgo Clínico y de Abandono del Tratamiento de la Tuberculosis (ERTB). Se trata de un estudio descriptivo y prospectivo, donde se realizaron dos entrevistas (455 profesionales), siendo que la segunda se produjo tras la ERTB. La clasificación del desempeño siguió los valores: ≤ 49,9%, críticos; entre 50 y 79,9%, insatisfactorios; y, ≥ 80%, satisfactorios. En la evaluación comparativa, se utilizó el test estadístico de McNemar, con p < 0,05. Tras la estratificación de riesgo, la mayor parte de las variables de cada eje mejoró significativamente. Concluimos que fue posible identificar el desempeño satisfactorio en la mayoría de las variables evaluadas en los ejes Estructura y Proceso de los servicios de atención primaria en salud en Belo Horizonte, en relación con las acciones de control de la tuberculosis mediante un cuestionario estandarizado.
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Serviços de Saúde , Tuberculose , Brasil , Humanos , Atenção Primária à Saúde , Estudos Prospectivos , Tuberculose/prevenção & controleRESUMO
INTRODUCTION: The concomitant use of antituberculosis and antiretroviral drugs, as well as drugs to treat other diseases, can cause drug-drug interactions. This study aimed to describe potential drug-drug interactions (pDDI) in patients with TB and HIV/AIDS co-infection, as well as to analyze possible associated factors. METHODS: This study was performed in a reference hospital for infectious and contagious diseases in the southeastern region of Brazil and evaluated adult patients co-infected with tuberculosis and HIV/AIDS. A cross-sectional study was conducted in which sociodemographic, clinical, and pharmacotherapeutic characteristics were assessed. The pDDI were identified using the Drug-Reax software. Association analysis was performed using either a chi-squared test or a Fisher's exact test. Correlation analysis was performed using the Spearman's coefficient. RESULTS: The study included 81 patients, of whom 77 (95.1%) were exposed to pDDI. The most frequent interactions were between antituberculosis and antiretroviral drugs, which can cause therapeutic ineffectiveness and major adverse reactions. A positive correlation was established between the number of associated diseases, the number of drugs used, and the number of pDDI. An association was identified between contraindicated and moderate pDDI with excessive polypharmacy and hospitalization. CONCLUSIONS: We found a high frequency of pDDI, especially among those hospitalized and those with excessive polypharmacy. These findings highlight the importance of pharmacists in the pharmacotherapeutic monitoring in these patients.
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Síndrome da Imunodeficiência Adquirida , Infecções por HIV , Preparações Farmacêuticas , Tuberculose , Adulto , Brasil , Estudos Transversais , Interações Medicamentosas , Infecções por HIV/complicações , Infecções por HIV/tratamento farmacológico , Humanos , Tuberculose/complicações , Tuberculose/tratamento farmacológicoRESUMO
OBJECTIVE: Evaluate the impact of the instrument of the "Stratification by Degree of Clinical Severity and Abandonment Risk of Tuberculosis Treatment" (SRTB) on the tuberculosis outcome. METHODS: This study was a pragmatic clinical trial involving patients with a confirmed diagnosis of tuberculosis treated at one of the 152 primary health care units in the city of Belo Horizonte, Brazil, between May of 2016 and April of 2017. Cluster areas for tuberculosis were identified, and the units and their respective patients were divided into intervention (use of SRTB) and nonintervention groups. RESULTS: The total sample comprised 432 participants, 223 and 209 of whom being allocated to the nonintervention and intervention groups, respectively. The risk of treatment abandonment in the nonintervention group was significantly higher than was that in the intervention group (OR = 15.010; p < 0.001), regardless of the number of risk factors identified. Kaplan-Meier curves showed a hazard ratio of 0.0753 (p < 0.001). CONCLUSIONS: The SRTB instrument was effective in reducing abandonment of tuberculosis treatment, regardless of the number of risk factors for that. This instrument is rapid and easy to use, and can be adapted to different realities. Its application showed characteristics predisposing to a non-adherence to the treatment and established bases to mitigate its impact.
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Tuberculose , Brasil/epidemiologia , Cidades , Humanos , Atenção Primária à Saúde , Fatores de Risco , Tuberculose/tratamento farmacológicoRESUMO
Background: Heteroresistance is the coexistence of susceptible and resistant strains in the same individual, considered the preliminary step for total resistance, and can stem from mixed infection or clonal heterogeneity. The aim of this study was to evaluate the heteroresistance of Mycobacterium tuberculosis to rifampicin and isoniazid and its characterization. Method: GenoType MTBDRplus®; Sanger sequencing of the rpoB, katG, and inhA genes; and Mycobacterial Interspersed Repetitive Unit - Variable Number Tandem Repeat (MIRU-VNTR) were performed. Results: In a total of 654 isolates, 530 were resistant, 124 were susceptible, and 29 were heteroresistant to a first-line drug. GenoType MTBDRplus® detected heteroresistance in the rpoB gene in 26/29 (89.6%), as compared to 5/29 (17.2%) in the katG gene and 2/29 (6.8%) in the inhA gene. Four isolates showed heteroresistance in these genes. The Sanger sequencing detected heteroresistance in the rpoB gene in 7/29 (24.1%), as compared to 3/29 (10.3%) in the katG gene. In one isolate, heteroresistance was concomitant in both the rpoB and katG genes. MIRU-VNTR detected mixed infection in three heteroresistant isolates, while four isolates showed clonal heterogeneity. Conclusions: GenoType MTBDRplus® detected more cases of heteroresistance when compared to sequencing. It was also possible to characterize mixed infection and clonal heterogeneity by MIRU-VNTR.
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Mycobacterium tuberculosis , Tuberculose Resistente a Múltiplos Medicamentos , Antituberculosos/uso terapêutico , Farmacorresistência Bacteriana Múltipla , Genótipo , Humanos , Isoniazida , Testes de Sensibilidade Microbiana , Mutação/efeitos dos fármacos , Mycobacterium tuberculosis/efeitos dos fármacos , Tuberculose Resistente a Múltiplos Medicamentos/tratamento farmacológicoRESUMO
OBJECTIVE: To estimate the prevalence of smoking and evaluate the factors associated with this outcome in people living with HIV (PLHIV). METHODS: This is a cross-sectional study of a prospective concurrent cohort of 462 individuals initiating antiretroviral therapy at three HIV/AIDS specialized services in Belo Horizonte between 2015 and 2017. The following smoking status were used: current smoker (CS), former smoker (FS) and non-smoker (NS). Multinomial logistic regression was performed with NS as the reference category. RESULTS: Most participants were men (81.4%), young (up to 34 years old; 57.2%) and non-white (75.7%). Of the total number of individuals, 27.7% were CS, 22.9% FS, and 49.4% NS. Most smokers were light smokers (65.1%), consumed up to 10 cigarettes per day and had been smoking for more than 10 years (63.3%), starting on average at 17.2 years of age (SD = 5.1). In the multivariate analysis, higher chances of being CS were associated with: being female, having up to 9 years of schooling, current or prior use of alcohol and illicit drugs (marijuana, cocaine and crack) and presenting signs and/or symptoms of anxiety or depression. Higher chances of being FS were associated with having up to 9 years of schooling and current or prior use of alcohol and illicit drugs (marijuana and crack). CONCLUSIONS: The results show that smoking is highly prevalent among PLHIV, indicating the need for HIV specialized services to prioritize smoking cessation interventions. These interventions should consider the use of alcohol and illicit drugs and be targeted especially to young people, those with low schooling and with signs and/or symptoms of anxiety or depression.
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Fármacos Anti-HIV/uso terapêutico , Terapia Antirretroviral de Alta Atividade/métodos , Infecções por HIV/tratamento farmacológico , Infecções por HIV/psicologia , Fumar/epidemiologia , Adolescente , Adulto , Brasil/epidemiologia , Estudos Transversais , Feminino , Infecções por HIV/epidemiologia , Humanos , Masculino , Prevalência , Estudos Prospectivos , Fatores SocioeconômicosRESUMO
OBJECTIVE: To evaluate the risk factors for the development of tuberculosis and multidrug-resistant tuberculosis (MDR-TB) in patients treated at a tertiary referral hospital. METHODS: This was a cross-sectional study based on data obtained from patients treated at the Júlia Kubitschek Hospital, located in the city of Belo Horizonte, Brazil, between October of 2012 and October of 2014. We evaluated sociodemographic, behavioral, clinical, and radiological variables. The outcome considered to identify associations between tuberculosis and the explanatory variables was the treatment prescribed. To evaluate the associations between MDR-TB and the same explanatory variables, the change in MDR-TB treatment was considered. RESULTS: The factors associated with tuberculosis were alcoholism, comorbidities, pulmonary cavitations, and a radiological pattern suggestive of tuberculosis. Cavitation and previous treatment for tuberculosis were associated with MDR-TB. CONCLUSIONS: Despite the significant progress made in the fight against tuberculosis, there is a need for coordinated actions that include social protection measures and patient support.
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Antituberculosos/farmacologia , Mycobacterium tuberculosis/efeitos dos fármacos , Tuberculose Resistente a Múltiplos Medicamentos/tratamento farmacológico , Tuberculose Pulmonar/tratamento farmacológico , Antituberculosos/uso terapêutico , Brasil/epidemiologia , Estudos Transversais , Humanos , Testes de Sensibilidade Microbiana , Centros de Atenção Terciária , Tuberculose Resistente a Múltiplos Medicamentos/diagnóstico , Tuberculose Resistente a Múltiplos Medicamentos/epidemiologia , Tuberculose Pulmonar/epidemiologia , Tuberculose Pulmonar/microbiologiaRESUMO
INTRODUCTION: The present study sought to assess the mean and activity based cost (ABC) of the laboratory diagnosis for tuberculosis through the application of conventional and molecular techniques-Xpert®MTB/RIF and Genotype®MTBDRplus-in a tertiary referral hospital in Brazil. METHODS: The mean cost and ABC formed the basis for the cost analysis of the TB laboratory diagnosis. RESULTS: The mean cost and ABC were US$ 4.00 and US$ 3.24, respectively, for a bacilloscopy; US$ 6.73 and US$ 5.27 for a Lowenstein-Jensen (LJ) culture; US$ 105.42 and US$ 76.56 for a drug sensitivity test (DST)-proportions method (PM) in LJ; US$ 148.45 and US$ 136.80 for a DST-BACTECTM MGITTM 960 system; US$ 11.53 and US$ 9.89 for an Xpert®MTB/RIF; and US$ 84.21 and US$ 48.38 for a Genotype®MTBDRplus. CONCLUSIONS: The mean cost and ABC proved to be good decision-making parameters in the diagnosis of TB and MDR-TB. The effective implementation of algorithms will depend on the conditions at each location.
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Custos e Análise de Custo/estatística & dados numéricos , Mycobacterium tuberculosis/genética , Tuberculose Resistente a Múltiplos Medicamentos/diagnóstico , Tuberculose Resistente a Múltiplos Medicamentos/economia , Tuberculose Pulmonar/diagnóstico , Tuberculose Pulmonar/economia , Brasil , Genótipo , Humanos , Mycobacterium tuberculosis/isolamento & purificação , Sensibilidade e Especificidade , Centros de Atenção TerciáriaRESUMO
INTRODUCTION: Rapid and accurate tuberculosis detection is critical for improving patient diagnosis and decreasing tuberculosis transmission. Molecular assays can significantly increase laboratory costs; therefore, the average time and economic impact should be evaluated before implementing a new technology. The aim of this study was to evaluate the cost and average turnaround time of smear microscopy and Xpert assay at a university hospital. METHODS: The turnaround time and cost of the laboratory diagnosis of tuberculosis were calculated based on the mean cost and activity based costing (ABC). RESULTS: The average turnaround time for smear microscopy was 16.6 hours while that for Xpert was 24.1 hours. The Xpert had a mean cost of USD 17.37 with an ABC of USD 10.86, while smear microscopy had a mean cost of USD 13.31 with an ABC of USD 6.01. The sensitivity of smear microscopy was 42.9% and its specificity was 99.1%, while the Xpert assay had a sensitivity of 100% and a specificity of 96.7%. CONCLUSIONS: The Xpert assay has high accuracy; however, the turnaround time and cost of smear microscopy were lower than those of Xpert.
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Bioensaio/economia , Patologia Molecular/economia , Tuberculose Pulmonar/diagnóstico , Bioensaio/métodos , Custos e Análise de Custo , Humanos , Microscopia , Mycobacterium tuberculosis , Patologia Molecular/métodos , Sensibilidade e Especificidade , Tuberculose , Tuberculose Pulmonar/economiaRESUMO
Background: Drug-resistant tuberculosis (TB) is an ongoing health threat, and the greatest challenge to adequate control of TB in many countries lies in the lack of proper laboratory drug-susceptibility test. The aim of this study was to evaluate the activity-based costs (ABC) of Kit SIRE Nitratase® (Kit SIRE) and compare its values with the conventional drug-susceptibility test. Methods: The ABC was calculated for three different approaches: Kit SIRE (clinical samples and cultures), proportion methods in Lowenstein Jensen (PM-LJ), and the Bactec™ MGIT™ 960 system based on Mycobacterial Research Laboratory's routine. Results: The ABC of Kit SIRE from cultures was US$ 148.54, while from clinical samples was US$ 136.12. In the case of conventional tests, the ABC of Bactec™ MGIT™ 960 was US$ 227.63 and of the PM-LJ was US$ 132.64. The Kit SIRE has a lower ABC when clinical samples are used instead of cultures. Compared to conventional tests, the ABC is similar to the PM-LJ and lower the Bactec™ MGIT™ 960. Conclusion: The Kit SIRE should be used as a screening method in clinical specimens and in culture for laboratories that do not have Bactec™ MGIT™ 960. Therefore, it can be incorporated into the routine of laboratories in countries with low resources and a high burden of TB and drug-resistant TB.
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Antituberculosos/farmacologia , Técnicas de Laboratório Clínico/instrumentação , Mycobacterium tuberculosis/efeitos dos fármacos , Kit de Reagentes para Diagnóstico/economia , Brasil , Técnicas de Laboratório Clínico/economia , Recursos em Saúde/economia , Hospitais , Humanos , Testes de Sensibilidade Microbiana/economia , Centros de Atenção Terciária , Tuberculose Resistente a Múltiplos Medicamentos/microbiologiaRESUMO
INTRODUCTION: Adverse drug reactions can develop when using anti-tuberculosis medication, and the effects of the drugs can also significantly hinder the treatment of patients. METHODS: A cross-sectional survey was conducted in 73 patients using two standardized questionnaires and the World Health Organization Quality of Life-Bref. RESULTS: All patients reported the presence of adverse drug reactions, 71.6% of which are minor and 28.3% both major and minor. The global quality of life analysis showed that patients with tuberculosis have a good average (67.3%). CONCLUSIONS: There is an association between quality of life and adverse drug reaction, educational level, and vulnerability.
Assuntos
Antituberculosos/efeitos adversos , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/epidemiologia , Qualidade de Vida/psicologia , Tuberculose/tratamento farmacológico , Idoso , Antituberculosos/administração & dosagem , Estudos Transversais , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/psicologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Fatores Socioeconômicos , Inquéritos e Questionários , Centros de Atenção Terciária , Tuberculose/psicologiaRESUMO
OBJECTIVE: To determine the frequency of drug therapy problem in the treatment of patients with tuberculosis and HIV/AIDS. METHODS: Data were obtained through a cross-sectional study conducted between September 2015 and December 2016 at a reference hospital in infectious diseases in Belo Horizonte (MG), Brazil. Sociodemographic, clinical, behavioral and pharmacotherapeutic variables were evaluated through a semi-structured questionnaire. Drug-related problems of pharmaceutical care were classified using the Pharmacotherapy Workup method. Factors associated with indication, effectiveness, safety and compliance drug therapy problem were assessed through multiple logistic regression. RESULTS: We evaluated 81 patients, and 80% presented at least one drug therapy problem, with indication and adherence drug therapy problem being the most frequent. The factors associated with drug therapy problem were age, marital status, new case, ethnicity, time of HIV diagnosis and time to treat tuberculosis. CONCLUSION: The frequency of drug therapy problem in coinfected patients was high and the identification of the main drug therapy problem and associated factors may lead the multiprofessional health team to ensure the use of the most indicated, effective, safe and convenient medicines for the patients clinical condition. Tuberculosis and HIV/AIDS coinfected individuals aged over 40 years are more likely to have drug therapy problems during treatment; in that, the most frequente are those that signal toward need of medication for an untreated health condition and non-compliance to treatment. Thus, older patients, unmarried or married, who have treated tuberculosis before, with a shorter time to tuberculosis treatment and longer time to diagnose HIV/AIDS, should receive special attention and be better followed by a multiprofessional health team because they indicate a higher chance of presenting Problems related to the use of non-adherent drugs.
Assuntos
Infecções Oportunistas Relacionadas com a AIDS/tratamento farmacológico , Antituberculosos/administração & dosagem , Cooperação do Paciente/estatística & dados numéricos , Medicamentos sob Prescrição/normas , Tuberculose/tratamento farmacológico , Adulto , Antituberculosos/efeitos adversos , Estudos Transversais , Feminino , Humanos , Masculino , Encaminhamento e Consulta , Fatores SocioeconômicosRESUMO
DNA genotyping of Mycobacterium tuberculosis has been widely applied in the understanding of disease transmission in many countries. The purpose of this study was to genotype the strains of M. tuberculosis isolated in patients with new tuberculosis (TB) cases in Minas Gerais, as well as to compare the similarity, discriminatory power, and agreement of the clusters between the IS6110 Restriction Fragment Length Polymorfism (RFLP) and 12 loci Variable Number Tandem Repeat - Mycobacterial Interspersed Repetitive Units (MIRU-VNTR) techniques. It was observed that 32% (66/204) of the isolated strains in the RFLP-IS6110 and 50.9% (104/204) of the isolated strains in the MIRU-VNTR presented a similarity of equal to or above 85%. The RFLP-IS6110 and MIRU-VNTR proved to contain a high discriminatory power. The similarity index resulting from the RFLP showed no recent transmission. Good agreement was observed between the techniques when clusters were detected; however, the best epidemiological relationship was found when using the RFLP-IS6110.
Assuntos
Análise do Polimorfismo de Comprimento de Fragmentos Amplificados/métodos , Técnicas de Tipagem Bacteriana/métodos , Repetições Minissatélites , Mycobacterium tuberculosis/isolamento & purificação , Polimorfismo de Fragmento de Restrição , Tuberculose/microbiologia , Brasil , Humanos , Mycobacterium tuberculosis/classificação , Mycobacterium tuberculosis/genéticaRESUMO
OBJECTIVE: To estimate the prevalence of latent Mycobacterium tuberculosis infection (LTBI) in renal transplant recipients and to assess sociodemographic, behavioral, and clinical associations with positive tuberculin skin test (TST) results. METHODS: This was a cross-sectional study of patients aged ≥ 18 years who underwent renal transplantation at the Renal Transplant Center of the Federal University of Minas Gerais Hospital das Clínicas, located in the city of Belo Horizonte, Brazil. We included renal transplant recipients who underwent the TST between January 2011 and July 2013. If the result of the first TST was negative, a second TST was administered. Bivariate and multivariate analyses using logistic regression were used to determine factors associated with positive TST results. RESULTS: The sample included 216 patients. The prevalence of LTBI was 18.5%. In the multivariate analysis, history of contact with a tuberculosis case and preserved graft function (estimated glomerular filtration rate ≥ 60 mL/min/1.73 m2) were associated with positive TST results. TST induration increased by 5.8% from the first to the second test, which was considered significant (p = 0.012). CONCLUSIONS: The prevalence of LTBI was low in this sample of renal transplant recipients. The TST should be administered if renal graft function is preserved. A second TST should be administered if the first TST is negative.