"It has been proposed that the reagent strip for leukocyte esterase designed for the testing of urine (Combur test UX) could be a useful tool for diagnosing spontaneous bacterial peritonitis SBP."[1] Braga et al. concluded that the Combur test UX urine screening test is a very sensitive and specific method for diagnosing SBP in the ascitic fluid of cirrhotic patients who have undergone paracentesis."