Navegando por Autor "COSTA, Ana Roberta Fusco da"

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Caracterização genética de micobactérias não tuberculosas isoladas de espécimes clínicos pulmonares no estado do Pará
(Universidade Federal do Pará, 2012-11-29) COSTA, Ana Roberta Fusco da; LIMA, Karla Valéria Batista; http://lattes.cnpq.br/9795461154139260
In recent years have been seen increased reports of nontuberculous mycobacteria (NTM) infections in the world. However, data on frequency and NTM species associated with pulmonary infections are still limited in Brazil, especially in states of Northern Brazil. The knowledge of species associated with NTM lung infections has clinical and epidemiological importance, being molecular techniques efficient tools to provide diagnostic species-specific, which is necessary for choice of appropriate therapy. This study describes the diversity of NTM isolated from respiratory specimens at the Evandro Chagas Institute between 1999 and 2011. The NTM were initially characterized by PCR-restriction analysis (PRA-hsp65) and reidentificated by sequencing of 16S rRNA, hsp65, rpoB and ITS1 targets. According to ours findings, the PRA-hsp65 method proved to be a convenient tool for identifying NTM, allowing distinction of a variety of species quickly, simply and inexpensively, as compared to the sequencing. Moreover, as suggested in this study, according to local species diversity, this method can be subject to modifications to provide greater discriminatory power. Sequence analysis of the rpoB gene of Mycobacterium avium complex (MAC) revealed that this target is not a suitable alternative for discrimination of isolates from State of Para, because it generated discrepant results with low taxonomic resolution. M. chelonae, M. avium and M. simiae complexes were the most frequent NTM. Two potential species were detected, M. paraensis sp. nov. and M. amazoniensis sp. nov., being proposed as new members of the M. simiae complex. Among the patients with NTM disease, the main characteristics found were women older than 50 years, pardo ethnic group and previous tuberculosis. Although this study does not show the real magnitude of NTM lung infections in State of Para, it describes the diversity of species and clearly reveals the importance of this group in the region, which has accounted 13.5% of mycobacterial isolates in a reference laboratory. The findings highlight the need for bacteriological confirmation of cases presumptively diagnosed as TB with primary resistance to therapy for TB.
Acesso aberto (Open Access)
Clinical aspects in patients with pulmonary infection caused by mycobacteria of the Mycobacterium abscessus complex, in the Brazilian Amazon
(Sociedade Brasileira de Pneumologia e Tisiologia, 2018-04) MONTEIRO, José Tadeu Colares; LIMA, Karla Valéria Batista; BARRETTO, Adriana Rodrigues; FURLANETO, Ismari Perini; GONÇALVES, Glenda Moraes; COSTA, Ana Roberta Fusco da; LOPES, Maria Luiza; DALCOLMO, Margareth Pretti
Objective: To describe the clinical manifestations of patients with pulmonary infection caused by mycobacteria of the Mycobacterium abscessus complex (MABSC), and to compare these manifestations with those of patients infected with other nontuberculous mycobacteria (NTM). Methods: This was a retrospective cohort study involving 43 patients divided into two groups: the MABSC group, consisting of patients with pulmonary infection caused by MABSC (n = 17); and the NTM group, consisting of patients with pulmonary infection caused by NTM other than MABSC (n = 26). Patients were previously treated with a regimen of rifampin, isoniazid, pyrazinamide, and ethambutol before the diagnosis of NTM was confirmed by two culture-positive sputum samples. The nucleotide sequences of the hsp65, 16S rRNA, and/or rpoB genes were analyzed to identify the mycobacteria. Data were collected on demographic, clinical, and radiological characteristics, as well as on treatment responses and outcomes. Results: Loss of appetite was the only clinical manifestation that was significantly more common in the MABSC group than in the NTM group (p = 0.0306). The chance of having to use a second treatment regimen was almost 12 times higher in the MABSC group than in the NTM group. Treatment success was significantly higher in the NTM group than in the MABSC group (83.2% vs. 17.6%; p < 0.0001). The chance of recurrence was approximately 37 times higher in the MABSC group than in the NTM group. Conclusions: In the study sample, treatment response of pulmonary disease caused by MABSC was less favorable than that of pulmonary disease caused by other NTM.
Acesso aberto (Open Access)
Diversidade genética das espécies de micobactérias não tuberculosas identificadas em laboratório de referência para o diagnóstico da tuberculose na região Norte
(Universidade Federal do Pará, 2009-02-20) COSTA, Ana Roberta Fusco da; LIMA, Karla Valéria Batista; http://lattes.cnpq.br/9795461154139260; CORVELO, Tereza Cristina de Oliveira; http://lattes.cnpq.br/7253864056606024
Recent years has seen an increase in reports of infections associated with nontuberculous mycobacteria (NTM). However, knowledge of the frequency and the species involved in pulmonary and non-pulmonary infections in Brazil are limited. We evaluated the occurrence of species of NTM isolated Mycobacteria Laboratory of the Instituto Evandro Chagas, Regional Laboratory of Public Health of the North. We analyzed all NTM isolates from pulmonary clinical specimens of individuals with infection, according to the criteria of the American Thoracic Society and the Department of Health between the years 2004 to 2007. The NTM were characterized by PCR-restriction analysis (PRA-hsp65) and 16S rRNA, hsp65 e rpoB genes sequencing. We identified 51 patients with infection caused by NTM, which the M. abscessus (n=2), M. bolletii (n=4), M. massiliense (n=9), M. avium (n=5), M. colombiense (n=5), M. fortuitum (n=4), M. simiae (n=2), M. interjectum (n=4), M. intracellulare (n=5), M. kansasii (n=1), M. scrofulaceum (n=1) e M. terrae (n=1) species that involved in lung infection. In eight individuals the NTM isolates were not identified at the species level, which may represent new taxonomic entity from M. simiae complex. This study describes the diversity of NTM isolated from pulmonary clinical specimens in the state of Pará, Brazilian Amazon Region. The finding cases of lung infections diagnosed and treated unsuccessfully for several months as tuberculosis suggest the need for isolation and identification of mycobacteria involved before establishment of treatment failure.