Valéria Goes Ferreira Pinheiro

III Diretrizes para Tuberculose da Sociedade Brasileira de Pneumologia e Tisiologia

New scientific articles about tuberculosis (TB) are published daily worldwide. However, it is difficult for health care workers, overloaded with work, to stay abreast of the latest research findings and to discern which information can and should be used in their daily practice on assisting TB patients. The purpose of the III Brazilian Thoracic Association (BTA) Guidelines on TB is to critically review the most recent national and international scientific information on TB, presenting an updated text with the most current and useful tools against TB to health care workers in our country. The III BTA Guidelines on TB have been developed by the BTA Committee on TB and the TB Work Group, based on the text of the II BTA Guidelines on TB (2004). We reviewed the following databases: LILACS (SciELO) and PubMed (Medline). The level of evidence of the cited articles was determined, and 24 recommendations on TB have been evaluated, discussed by all of the members of the BTA Committee on TB and of the TB Work Group, and highlighted. The first version of the present Guidelines was posted on the BTA website and was available for public consultation for three weeks. Comments and critiques were evaluated. The level of scientific evidence of each reference was evaluated before its acceptance for use in the final text.

Intestinal permeability and malabsorption of rifampin and isoniazid in active pulmonary tuberculosis

Low antimycobacterial drug concentrations have been observed in tuberculosis (TB) patients under treatment. The lactulose/mannitol urinary excretion test (L/M), normally used to measure intestinal permeability, may be useful to assess drug absorption. The objective of this research was to study intestinal absorptive function and bioavailability of rifampin and isoniazid in TB patients. A cross sectional study was done with 41 patients and 28 healthy controls, using the L/M test. The bioavailabilities of rifampin (R) and isoniazid (H) were evaluated in 18 patients receiving full doses. Urinary excretion of mannitol and lactulose, measured by HPLC, was significantly lower in TB patients. The serum concentrations of the drugs were below the expected range for R (8-24 mcg/mL) or H (3-6 mcg/mL) in 16/18 patients. Analyzing the drugs individually, 12/18 patients had low serum concentrations of R, 13/18 for H and 8/18 for both drugs. We suggest that there is a decrease in the functional absorptive area of the intestine in TB patients, which would explain the reduced serum concentrations of antituberculosis drugs. There is a need for new approaches to improve drug bioavailability in TB patients.

Prevalência da tuberculose multirresistente no Estado do Ceará, 1990-1999

Multidrug-resistant tuberculosis (MDR-TB) is a worldwide concern but its magnitude in the state of Ceara - Northeastern Brazil has been so far unknown. Objectives: To determine the prevalence of MDR-TB among us as well as the sesceptibility of Mycobacterium tuberculosis> to antituberculosis drugs. Methods: A retrospective study was conducted using 1,500 susceptibility tests (ST) for rifampin (RFM), isoniazid (INH), streptomycin (SM), pyrazinamide (PYZ), ethambutol (ETM) and ethionamide (ETH) that were performed at the Central Laboratory of the State of Ceara (LACEN) between 1990 and 1999. The proportion method test was used. Results: Of the 1,500 stains studied, 404 (27%) were resistant to at least one drug, including both primary and acquired resistance. MDR-TB, defined as resistance to at least rifampin and isoniazid was observed in 266 (17.7%) patients. During the study period, there were 41,073 TB cases and MDR-TB prevalence was 0.65% in our state. Among the patients studied, 62.3% were men and mean age was 40.17 ± 14.62. Overall prevalence for single-drug resistance was 8.1% (INH = 5.7%; SM = 1.5%; and RFP = 0.9%). Resistance to 2, 3, 4, 5 and 6 drugs was, respectively, 10.8%; 3.1%; 0.9%; 1.5%; and 2.9%. HIV testing was performed in all inpatients and some outpatients (total of 86 patients) and revealed that they were all HIV negative. The probability of 5-year survival (138 patients assessed) was greater in the MDR-TB group treated with alternative drugs, including the patients of the failure group. Conclusion: The MDR-TB prevalence rate found in this study is intermediate in comparison with those reported in Brazil and the other parts of the world. Preventive approaches, early diagnosis and the development of effective, safe and relatively inexpensive new drugs should be stimulated.

Ocorrência de tuberculose doença entre contatos de tuberculose sensível e multirresistente

INTRODUCAO: Desde os primeiros anos da quimioterapia anti-tuberculose, existe polemica a respeito da transmissibilidade, infectividade, virulencia e patogenicidade de bacilos sensiveis e resistentes a quimioterapia. OBJETIVO: Determinar a ocorrencia de casos de tuberculose doenca entre contatos intra-domiciliares de tuberculose multirresistente e tuberculose sensivel. METODO: Foi realizado um estudo caso-controle, sendo considerado tuberculose multirresistente o caso de portador de bacilo resistente a pelo menos rifampicina e isoniazida, e tuberculose sensivel o caso que tivesse feito o primeiro tratamento num periodo semelhante ao primeiro tratamento do caso de tuberculose multirresistente, estando o paciente curado no momento da entrevista. Contato foi definido como o residente no domicilio do caso indice. Os casos foram selecionados a partir dos resultados dos testes de sensibilidade obtidos pelo metodo das proporcoes no Laboratorio Central do Estado do Ceara, e os controles constituidos por pacientes baciliferos registrados no Programa de Controle da Tuberculose, entre 1.990 e 1.999. RESULTADOS: Foram avaliados 126 portadores de tuberculose multirresistente e 176 de tuberculose sensivel. O numero de contatos foi de 557 no grupo dos casos, 752 no grupo controle e a media de contatos por caso indice foi de 4,42 e 4,27 respectivamente. Entre os casos, 4,49% dos contatos (25/557) fizeram tratamento para tuberculose apos os casos indices. Esse percentual foi de 5,45% (41/752) entre os controles (p = 0,4468). Ocorreu micro-epidemia de tuberculose multirresistente confirmada por teste de sensibilidade em oito familias. CONCLUSAO: Os resultados deste estudo sugerem que a ocorrencia de tratamentos de tuberculose gerados entre contatos intra-domiciliares de tuberculose sensivel e tuberculose multirresistente e semelhante.

Castleman's disease accompanied by pleural effusion

Castlemans disease is a rare disorder of the lymphoid tissue. We report the case of a female patient with bilateral otosclerosis, no respiratory symptoms, and pleural effusion discovered as an incidental finding on a chest X-ray. Computed tomography of the chest revealed a mediastinal mass. The biopsy findings demonstrated that it was a plasmacytic variant of Castlemans disease. The patient underwent mediastinal mass resection. This resulted in near-total resolution of the effusion, which remained as a small loculation within the left pleural space.

Diagnóstico e tratamento da tuberculose latente em pacientes com doenças inflamatórias crônicas e uso de imunobiológicos inibidores do TNF-α

OBJECTIVE To determine the clinical and epidemiological profile of patients who are candidates for TNF-α inhibitor use and are classified as having latent tuberculosis (LTB), as well as to evaluate the outcomes of prophylactic treatment with isoniazid. METHODS A prospective descriptive analysis followed by an analytical, observational, cross-sectional study of the outcomes of prophylactic treatment in a group of 45 candidates for TNF-α inhibitor use. We evaluated the patients through anamnesis, clinical examination, chest X-ray, and tuberculin skin test (TST) using the Mantoux method. RESULTS The mean age was 45 years, and 56.0% of the patients were female. Chronic rheumatic diseases, chronic dermatological diseases, and Crohns disease were present in 46.7%, 40.0%, and 13.3% of the patients, respectively. The mean TST induration was 14.6 mm (range: 5-30 mm). The majority (n = 30) of the 45 patients (66.7%) had an induration > 10 mm. In the 16 patients with BCG vaccination scars, the mean induration was 15.7 mm, and 14 of those patients had an induration > 10 mm. Chest X-ray results were considered normal, with minimal alterations, in 64.4% and 35.6% of the patients, respectively. The treatment with isoniazid was abandoned by 1 patient (2.2%) and completed by 41 (91.2%), whereas it was interrupted because of drug-induced hepatitis in 2 (4.4%), and 1 patient (2.2%) was transferred to another hospital. Of those who completed the treatment, 5 experienced mild side effects. CONCLUSIONS Determining the profile of candidates for TNF-α inhibitor use is important for the management of LTB treatment and for the establishment of clinical protocols for the use and monitoring of the use of these medications.

Intestinal barrier function and serum concentrations of rifampin, isoniazid and pyrazinamide in patients with pulmonary tuberculosis

Intestinal barrier function and serum concentrations of rifampin, isoniazid and pyrazinamide were studied in healthy controls and patients with active pulmonary tuberculosis. A case-control study of 29 controls and 30 cases attending at the Health Center, July, 2004 to December, 2005 was conducted. The body mass index was significantly reduced in cases compared to controls (p < 0.001). The intestinal paracellular transport of lactulose was significantly (p = 0.019) reduced in cases compared to controls. The transcellular transport of mannitol and the lactulose:mannitol ratio were not significantly (p = 0.0698) reduced in cases compared to controls. Low serum concentrations of rifampin, isoniazid and pyrazinamide were observed in 81% (48/59), 92% (54/59) and 28% (12/59), respectively, in all individuals. The results demonstrated a marked decrease on intestinal paracellular transport in patients with active pulmonary tuberculosis and reduced serum concentrations of rifampin and isoniazid in both groups.

Gravidez em paciente com microlitíase alveolar pulmonar grave

Pulmonary alveolar microlithiasis (PAM) is a rare disease that affects both lungs. It is characterized by the presence of small calculi (calcium phosphate) within the alveolar spaces. We report the case of a 26-year-old female whose diagnosis was based on characteristic findings on chest X-rays and high-resolution computed tomography scans. The patient, 28 weeks pregnant, was rehospitalized 10 months after the diagnosis, presenting hypoxemic acute respiratory failure and severe restrictive ventilatory defect on spirometry. After 32 completed weeks of gestation (228 days), she was submitted to cesarean section, and the outcome was successful for mother and newborn. PAM has a variable clinical course. It is suggestive of an autosomal recessive inheritance pattern and has been associated with positive family history. The etiology of PAM is unclear, and many authors speculate that there is a local enzymatic defect responsible for the intra-alveolar accumulation of calcium. Reports of patients with PAM who become pregnant are exceptional, and this is the first case described in Brazil. The course of this disease is usually slow and progressive, and patients typically die of cardiorespiratory failure. The present case illustrates the need to offer female patients, especially those with advanced disease, genetic counseling and orientation regarding the risks of pregnancy. Currently, the only effective therapy is lung transplantation.

Tuberculose em ambiente hospitalar: perfil clínico em hospital terciário do ceará e grau de conhecimento dos profissionais de saúde acerca das medidas de controle -doi:10.5020/18061230.2010.p260

(TB) and to assess the knowledge of health personnel on fundamental concepts about TB and control measures for pulmonary tuberculosis in a hospital environment. Methods: The study was conducted in a tertiary hospital in Fortaleza-CE and involved patients admitted with TB and health professionals responsible for assistance. A first phase was characterized by a retrospective study of medical records of patients admitted with suspected TB. In a second stage, a cross-sectional study with application of a structured questionnaire assessed the knowledge of health personnel on TB control measures in a hospital environment. Results: Sixty-seven patients admitted with suspected TB had their medical records assessed. Among the confirmed cases, the most frequent clinical form was pulmonary (81.3%). Out of 55 patients admitted with suspected pulmonary tuberculosis, only 29 (52.7%) were admitted in a respiratory isolation bed. Twenty-six patients with suspected pulmonary tuberculosis on admission stayed a total of 148 days out of a respiratory isolation bed (average 4.1 days / patient). The knowledge of 159 health professionals about TB was assessed. Regarding the transmission of TB, 107 (67.2%) were unaware of airborne transmission and 109 (68.5%) ignored the clinical forms that require respiratory isolation. Conclusions: Pulmonary tuberculosis is the most frequent clinical form among inpatients in a tertiary hospital in Fortaleza- CE. Considerable fraction of health personnel doesn’t know key concepts related to tuberculosis and essential for the proper and safe care.