Diagnostic approaches for paediatric tuberculosis by use of different specimen types, culture methods, and PCR: a prospective case-control study.

The Lancet Infectious Diseases
Richard OberhelmanCarlton A W Evans

Abstract

The diagnosis of pulmonary tuberculosis presents challenges in children because symptoms are non-specific, specimens are difficult to obtain, and cultures and smears of Mycobacterium tuberculosis are often negative. We assessed new diagnostic approaches for tuberculosis in children in a resource-poor country. Children with symptoms suggestive of pulmonary tuberculosis (cases) were enrolled from August, 2002, to January, 2007, at two hospitals in Lima, Peru. Age-matched and sex-matched healthy controls were enrolled from a low-income shanty town community in south Lima. Cases were grouped into moderate-risk and high-risk categories by Stegen-Toledo score. Two specimens of each type (gastric-aspirate, nasopharyngeal-aspirate, and stool specimens) taken from each case were examined for M tuberculosis by auramine smear microscopy, broth culture by microscopic-observation drug-susceptibility (MODS) technique, standard culture on Lowenstein-Jensen medium, and heminested IS6110 PCR. Specimens from controls consisted of one nasopharyngeal-aspirate and two stool samples, examined with the same techniques. This study is registered with ClinicalTrials.gov, number NCT00054769. 218 cases and 238 controls were enrolled. 22 (10%) cases had at...Continue Reading

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