Rapid detection of Mycobacterium tuberculosis in children using blood and urine specimens
Rev. Soc. Bras. Med. Trop
;
53: e20200051, 2020. tab
Artigo
em Inglês
| SES-SP, ColecionaSUS, LILACS
| ID: biblio-1136823
ABSTRACT
Abstract INTRODUCTION:
Laboratory and clinical features of childhood tuberculosis (TB) are non-specific and establishing an accurate diagnosis remains a challenge. This study evaluated a Single tube nested-PCR (STNPCR) to detect genomic DNA of Mycobacterium tuberculosis complex in blood and urine.METHODS:
Biological samples were obtained from children (<15 years old) with clinical suspicion of pulmonary and extrapulmonary TB at public hospitals in Recife-Pernambuco, Brazil. Cultures yielded negative results in a majority of childhood TB cases, which are generally paucibacillary. A set of clinical, epidemiological, radiological, and laboratory criteria with evident clinical improvement after anti-TB treatment were frequently used to define childhood TB cases.RESULTS:
Ninety children with clinical suspicion were enrolled in this study (44 with TB and 46 without TB). The pulmonary TB group had 20 confirmed cases and 46 negative controls, while the extrapulmonary TB group had 24 confirmed cases. The STNPCR showed sensitivities to pulmonary and extrapulmonary TB of 47.4% and 52.2% (blood) and 38.8% and 20% (urine), respectively. Considering the low performance of STNPCR on separate samples, we decided to perform a combined analysis (parallel sensitivity analysis) of the results from blood and urine samples. The parallel sensitivity increased to 65% in blood and 62.5% in urine. The specificity in both samples ranged from 93.5-97.8%.CONCLUSIONS:
Although STNPCR showed moderate sensitivity, the specificity is high; therefore, the test can be used as an auxiliary tool to diagnose TB in children. It is a rapid test that demonstrated better performance than other diagnostic tests in paucibacillary samples as it does in childhood tuberculosis.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Tuberculose Pulmonar
/
Mycobacterium tuberculosis
Tipo de estudo:
Estudo diagnóstico
/
Estudo observacional
Limite:
Adolescente
/
Criança
/
Criança, pré-escolar
/
Feminino
/
Humanos
/
Lactente
/
Masculino
/
Recém-Nascido
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Inglês
Revista:
Rev. Soc. Bras. Med. Trop
Ano de publicação:
2020
Tipo de documento:
Artigo
Instituição/País de afiliação:
Fundação Oswaldo Cruz/BR
/
Universidade Federal do Rio de Janeiro/BR
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