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Infectiousness of patients with smear-negative pulmonary tuberculosis, assessed by Real-time Polymerase Chain Reaction, XpertMTB/RIF. | LitMetric

Infectiousness of patients with smear-negative pulmonary tuberculosis, assessed by Real-time Polymerase Chain Reaction, XpertMTB/RIF.

J Infect

Tuberculosis Unit, Infectious Disease Department, Bellvitge University Hospital-IDIBELL, L'Hospitalet de Llobregat, c/ de la Feixa Llarga s/n, 08907, L'Hospitalet de Llobregat, Barcelona, Spain; University of Barcelona, L'Hospitalet de Llobregat, Barcelona, Spain.

Published: March 2020

Currently, pulmonary tuberculosis (TB) isolation recommendations are based on serial sputum smear microscopy. To assess infectiousness of smear-negative/GeneXpert-positive (Sm-/GXpert+) pulmonary TB, we evaluated 511 contacts of pulmonary TB patients attended at a teaching hospital in Spain (2010-2018). There were no statistically significant differences in rates of Mycobacterium tuberculosis infection (46.2% contacts of smear-positive and 34.6% contacts of Sm-/GXpert+ pulmonary TB patients, p = 0.112). Sm-/GXpert+ pulmonary TB poses a substantial risk of transmission of M. tuberculosis infection. Our results add evidence to support including Real-time Polymerase Chain Reaction (XpertMTB/RIF) in the work-up diagnosis of suspected pulmonary TB cases to make decisions on air-borne isolation.

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Source
http://dx.doi.org/10.1016/j.jinf.2019.12.023DOI Listing

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