ABSTRACT The aim of this study was to evaluate the performance of Xpert MTB/RIF Ultra (Ultra) compared with its predecessor. Xpert MTB/RIF (Xpert). in the diagnosis of tuberculosis (TB) in a low TB incidence country. Retrospective analysis was performed on 689 clinical samples received between 2015 and 2018. https://www.johnpirillo.com/product-category/sofa-cushions/