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Original Article09-28-2004Efficiency of clinical, radiological and laboratory testing in the diagnosis of pleural tuberculosis
Jornal Brasileiro de Pneumologia. 2004;30(4):319-326
Abstract
Original ArticleEfficiency of clinical, radiological and laboratory testing in the diagnosis of pleural tuberculosis
Jornal Brasileiro de Pneumologia. 2004;30(4):319-326
DOI 10.1590/S1806-37132004000400005
Views14See moreBACKGROUND: In Brazil, tuberculosis is the major cause of pleural effusion. In more than 50% of cases, treatment has been initiated prior to confirmation of the diagnosis. Our objective was to identify factors that can contribute to the diagnosis. METHOD: We studied 215 consecutive patients with pleural effusion: 104 from tuberculosis (TB) and 111 from other causes (41 were from malignancies, 29 involved transudation, 28 were parapneumonic and 13 were from other etiologies). Clinical, radiological and laboratorial variables were evaluated for differences between the two groups, individually or in combination. RESULTS: Male gender and PPD > 10 mm were significantly more frequent in the tuberculosis group. Radiological features were similar in both groups. Among the continuous variables, adenosine deaminase (ADA), percentile of cells, protein and age performed better as isolated diagnostic criteria. Between the group with tuberculosis and that with pleural effusion from other causes, no significant differences were found in Lactate dehydrogenase, total leukocytes or duration of disease. The correlation of ADA with any other well-developed continuous variable showed an LR+ > 10 and an LR- < 0.1, which effectively confirmed or ruled out a diagnosis of tuberculous pleural effusion. CONCLUSIONS: In patients with ADA levels > 39 at 95% sensitivity, the specificity can be improved to more than 90% if we consider non purulent effusion or effusion with a predominance of lymphocytes (> 50%).
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Original Article09-28-2004Prevalence of tuberculin skin testing among medical students in Campos School of Medicine, Rio de Janeiro
Jornal Brasileiro de Pneumologia. 2004;30(4):350-357
Abstract
Original ArticlePrevalence of tuberculin skin testing among medical students in Campos School of Medicine, Rio de Janeiro
Jornal Brasileiro de Pneumologia. 2004;30(4):350-357
DOI 10.1590/S1806-37132004000400009
Views13See moreBACKGROUND:The Hospital Ferreira Machado, utilized, in part, as a clinical training center for graduate students from the Faculdade de Medicina de Campos, admitted 65 tuberculosis (TB) patients in 2001. OBJECTIVE: To estimate the prevalence of positive tuberculin skin tests (TST) among medical students during distinct periods of their training and to identify and analyze correlated factors. To compare positivity rates, taking into account the booster effect, and estimate incidence of positive TST by class year. METHODS: A cross-sectional study was conducted among 500 students registered in the first semester of 2002. Using a structured and validated questionnaire, data regarding demographics, BCG vaccination and potential exposure to TB patients were obtained. A professional licensed by the Health Department administered the TSTs, and the two-step Mantoux method (PPD Rt23) was used. RESULTS: Of the 500 eligible subjects, 316 (63.2%) were excluded. Analysis showed increasing two-step TST positivity rates corresponding to extent of clinical experience (4%, 6.4% and 13.1%) and a tendency toward correlation with professional level. The highest percentage of positive TSTs was found during the period of clinical training, which corresponded to the time of greatest exposure to patients (1000 hours). CONCLUSIONS: a) the TST positivity rate was high (7.9%) among students; b) TST was correlated with in-hospital training stage; c) evaluation of the booster effect lead us to highly recommended boosters in order to reduce the number of false-negative TST results.
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Original Article09-28-2004Single Nucleotide Polymorphisms (SNPs) of the TNF-alpha (-238/-308) gene among TB and nom TB patients: susceptibility markers of TB occurrence?
Jornal Brasileiro de Pneumologia. 2004;30(4):371-377
Abstract
Original ArticleSingle Nucleotide Polymorphisms (SNPs) of the TNF-alpha (-238/-308) gene among TB and nom TB patients: susceptibility markers of TB occurrence?
Jornal Brasileiro de Pneumologia. 2004;30(4):371-377
DOI 10.1590/S1806-37132004000400012
Views12BACKGROUND: Host genetic factors may play a role in the susceptibility to active tuberculosis (TB), and several polymorphisms in different cytokine coding genes have been described and associated with diseases to date. OBJECTIVES: To investigate whether polymorphisms within the promoter region of the TNF-alpha (-238/-308) coding genes are associated to the occurrence of active TB. METHODS: SNPs within the TNF-alpha gene were analyzed by PCR-RFLP among two groups of individuals: patients with TB (n = 234, and patients non TB (n = 113). RESULTS: In this study, the presence of the -238A allele was associated with susceptibility to TB disease occurrence and severity (p = 0,00002; OR = 0,15; IC = 0,06-0,36. On the contrary, the -308A allele was associated with protection to the occurrence of another pulmonary diseases. CONCLUSIONS: These results suggest the importance of genetics studies on TB occurrence. Further studies are needed pursuing a better understanding of the human pathogenesis of M. tb.
Keywords:AllelesGenotypeLung diseasesPolymorphism, single nucleotideTuberculosisTumor necrosis factorSee more -
Original Article09-28-2004Deaths attributed to tuberculosis in the State of Rio de Janeiro
Jornal Brasileiro de Pneumologia. 2004;30(4):417-423
Abstract
Original ArticleDeaths attributed to tuberculosis in the State of Rio de Janeiro
Jornal Brasileiro de Pneumologia. 2004;30(4):417-423
DOI 10.1590/S1806-37132004000400006
Views12See moreBACKGROUND: In 1998, tuberculosis incidence and mortality rates in the state of Rio de Janeiro (RJ) were the highest in Brazil. However, the RJ tuberculosis database (SINAN-TB-RJ) has proven unreliable. OBJECTIVE: To evaluate the current tuberculosis control program by analyzing tuberculosis-attributed deaths. METHODS: Descriptive studies of the SINAN-TB-RJ and tuberculosis mortality (SIM-TB-RJ) databases were carried out. Both databases were linked using the Reclink program. A study based on medical records was performed in the five hospitals where the greatest numbers of tuberculosis deaths occurred. RESULTS: In the SINAN-TB-RJ database, 16,567 cases were registered in adults (> 14 years of age). Pulmonary disease was present in 13,989 (84.5%), of whom 8223 (56.8%) presented sputum smears that were positive for acid fast bacilli. Anti-HIV testing, recommended for all patients with tuberculosis, was performed in only 4141 (25%) of tuberculosis cases. The SIM-TB-RJ database showed 1146 deaths that were attributed to tuberculosis. Only 478 (41.7%) of those had been reported to the health care system (SINAN-TB-RJ). Among the 302 medical records analyzed, 154 (50.9%) recorded hospitalizations of up to 10 days and 143 (47.3%) had respiratory symptoms for more than 60 days before diagnosis. Among 125 cases of retreatment, the RHZE regimen recommended by the Brazilian Ministry of Health was prescribed for only 43 (34.4%). CONCLUSION: This study demonstrates weakness in the RJ tuberculosis control program, characterized by delayed diagnosis, limited use of the recommended tests, poor reporting, and non-compliance with the Ministry of Health guidelines.
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Original Article09-02-2004Clinical and epidemiological characteristics of contagious adult of tuberculosis in children
Jornal Brasileiro de Pneumologia. 2004;30(3):243-252
Abstract
Original ArticleClinical and epidemiological characteristics of contagious adult of tuberculosis in children
Jornal Brasileiro de Pneumologia. 2004;30(3):243-252
DOI 10.1590/S1806-37132004000300010
Views10See moreBACKGROUND: Tuberculosis in children generally occurs as a direct result of cohabitation with a contagious adult. OBJECTIVE: To create a profile of a typical adult with contagious tuberculosis (as identified through the public health system) living with a child who has been diagnosed with tuberculosis. METHOD: Case study. Children younger than 14 years of age who were diagnosed with tuberculosis were included. Parents were interviewed using structured questionnaires. Means and standard deviations were analyzed using the Student's t-test. Fisher's exact test or the Dz test was used for comparisons. RESULTS: Fifty children, representing 96% of those diagnosed with tuberculosis in the Porto Alegre health care system between July 20, 2001 and August 10, 2002, were included. The mean age was 76 months, and 60% were girls. The classic forms of pulmonary presentation (consolidation or cavitation) were seen in 38%. The majority of the children were diagnosed in the hospital and came from homes in which there were (a mean of) 6 cohabitants and a total family income less than 2 times the local minimum wage. Using ELISA, HIV co-infection was identified in 25% (although not all were tested). The children regularly visited places other than their homes. In 78% of cases, the contagious adult was identified. These contagious adults were mostly males (56%), and the mean age was 32. In most cases (79%), the contagious adult was a relative, usually a parent. Within this group of adults with contagious tuberculosis, HIV co-infection was identified in 43% of those tested. CONCLUSIONS: Adults with contagious tuberculosis living in the home continue to be the most likely source of tuberculosis infection in children. Co-infection with HIV in these pediatric patients, as well as in the cohabiting adults with contagious tuberculosis, is a significant finding. It must be emphasized that the possibility of contact with contagious individuals in the home should be explored in every diagnosed case of pediatric tuberculosis.
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Original Article06-08-2004Tuberculosis associated to AIDS: demographic, clinical and laboratory characteristics of patients cared for at a reference center in the south of Brazil
Jornal Brasileiro de Pneumologia. 2004;30(2):140-146
Abstract
Original ArticleTuberculosis associated to AIDS: demographic, clinical and laboratory characteristics of patients cared for at a reference center in the south of Brazil
Jornal Brasileiro de Pneumologia. 2004;30(2):140-146
DOI 10.1590/S1806-37132004000200011
Views13See moreBACKGROUND: Synergism between tuberculosis and HIV is responsible for the increased morbidity-mortality rate in AIDS patients. OBJECTIVE: To delineate the profile of patients with tuberculosis and AIDS in the city of Rio Grande by relating demographic, clinical and laboratory data. METHOD: The sample comprised all cases of tuberculosis defined by identification of Mycobacterium tuberculosis that occurred in the AIDS Service of the University Hospital/FURG between September, 1997 and December, 2000, which added to a total of 31 patients confirmed as definite cases of AIDS. Using the Ogawa-Kudoh culture method and the Kinyoun bacilloscopy, 33 clinical pulmonary and extrapulmonary specimens were analyzed. Identification of M. Tuberculosis was made by the usual phenotype methods. The method of proportions was chosen to establish resistance of isolated strains. RESULTS: The mean age was of 33.8±9.9 years, with a man/ woman ratio of 2.87:1 and 80.7% of Caucasians. All patients (n=31) exhibited overall or specific clinical manifestations of turberculosis at the time of suspicion diagnosis. In 20 of the cases risk factors were observed: use of injected drugs, alcoholism, malnutrition, imprisonment. Pulmonary disease occurred in 19 cases, extrapulmonary in 10 and the association of both in two. Lymph node commitment was more frequent among those with extrapulmonary disease. The isolated strains (33) were identified as M. Tuberculosis and 28 were tested and showed sensibility to Isoniazid and Rifampin. CONCLUSION: In AIDS patients, tuberculosis appeared with various clinical manifestations, jeopardizing both men and women of less favored social conditions while at a fully productive stage of their lives.
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Original Article05-12-2004
Factors associated with inadequate treatment in a group of patients with multidrug-resistant tuberculosis
Jornal de Pneumologia. 2003;29(6):350-357
Abstract
Original ArticleFactors associated with inadequate treatment in a group of patients with multidrug-resistant tuberculosis
Jornal de Pneumologia. 2003;29(6):350-357
DOI 10.1590/S0102-35862003000600006
Views7See moreBACKGROUND: Multidrug resistant tuberculosis is a threat to tuberculosis control worldwide. In many studies, it has been suggested that inadequate treatment is a risk factor for the development of multidrug resistent tuberculosis. OBJECTIVE: To identify the factors associated with inadequate treatment in a group of patients with multidrug resistent tuberculosis. METHOD: The authors identified all drug sensitivity test for tuberculosis performed at the Central Laboratory of the state of Ceará from 1990 to 1999. Retrospective and prospective analysis was performed, comparing the characteristics of adequately treated patients with those of inadequately treated patients. Multidrug resistance was defined as resistance to 2 drugs (rifampin and isoniazid) or more, using the Cox proportional hazards model. RESULTS: Of the 1,500 sensitivity test performed at the Central Laboratory of Public Health of the state of Ceará, 266 revealed multidrug-resistant strains. Of those 266 patients, the authors were able to identify only 153, of whom 19 were excluded. Thus, our sampling consisted of 134 patients. Univariate analysis demonstrated that the significant factors associated with inadequate treatment were: noncompliance with the treatment, extreme poverty, drug intolerance, mistakes in the management of the patients, lack of medication being supplied by the health service, two or more previous treatments, pronounced lung cavities and bilateral lesions on chest X-rays. They found a further association (p < 0.0010) between alcoholism or smoking and noncompliance with the treatment. In the multivariate analysis, the factors associated with an outcome of inadequate treatment were: two or more previous treatments (p < 0.0001, OR = 5.9; CI 95%: 2.5-13.7), pronounced cavitation (p < 0.0217, OR = 2.7; CI 95%: 1.2-6.1) and bilateral chest X-ray lesions (p < 0.0226, OR = 3.2; CI 95%: 1.4-7.4) CONCLUSION: In the study, the authors observed that factors related to inadequate treatment are wide-ranging. An attempt at better control of the disease is warranted, especially in those patients with pronounced cavitation or bilateral lesions in chest X-rays. And those with 2 or more previous treatments.
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Original Article05-12-2004
Profile and follow-up of patients with Mycobacterium sp. at the Hospital das Clínicas da Universidade Federal de Minas Gerais
Jornal de Pneumologia. 2003;29(6):365-370
Abstract
Original ArticleProfile and follow-up of patients with Mycobacterium sp. at the Hospital das Clínicas da Universidade Federal de Minas Gerais
Jornal de Pneumologia. 2003;29(6):365-370
DOI 10.1590/S0102-35862003000600008
Views12BACKGROUND: Surveys of patients diagnosed with mycobacteriosis,taken at the Laboratory of Mycobacteriology of the Hospital das Clínicas da Universidade Federal de Minas Gerais, have shown that lack of information concerning diagnosis prevented 42% from initiating treatment. OBJECTIVE: To evaluate the profile of patients with mycobacterial infection attending the Hospital das Clínicas da Universidade Federal de Minas Gerais. To describe the follow up of those patients and compare it to the guidelines made by the National Program for the Control of Tuberculosis. METHODS: The files of patients diagnosed with mycobacterium infection during 2002 were selected from the archives of the Laboratory of Mycobacteriology of the Hospital das Clínicas da Universidade Federal de Minas Gerais. An active search for these patients was carried out and follow-up exams were then performed. RESULTS: Of the 66 patients selected, 62 (94%) were positive for Mycobacterium tuberculosis and 4 (6%) had nontuberculous mycobacteriosis. Another 4 (6%) had been transferred to other institutions. Of the remaining 58, 37 (63%) had been cured, 1 (2%) had refused treatment, 9 (16%) were not found and 11 (19%) had died. Of the 11 deaths, 7 (64%) had tested positive for HIV. CONCLUSION: Patients failed to receive treatment not due to lack of diagnosis, but to inadequate structure, low awareness levels of all parties, and lack of tuberculosis control organization at the hospital level. Due to the high number of HIV-positive patients, the number of patients cured was lower than that required by the National Health Ministry. Deaths were attributed to HIV infection and lack of knowledge about the disease. In order to identify and address the problems associated with clinical laboratory practice, laboratory professionals must work in concert with their clinical counterparts when carrying out operational research on tuberculosis.
Keywords:Mycobacterium infectionsTuberculosisSee more

