sensitivity and specificity of nitrite test to urine culture for diagnosing urinary tract infection in patients with sickle cell anemia


Abstract in English

Objective: Evaluate sensitivity and specificity of nitrite test to urine culture(gold standard) for diagnosing urinary tract infection in patients with sickle cell anemia with urinary symptoms and signs. Methods: The study sample included 79 children aged 2 to 14 years with SCA presenting with fever (temperature >38°C),abdominal pain, urgency, dysuria or increased urinary frequency who referral to the general pediatric clinic and the children's ambulance department in Tishreen University Hospital in Lattakia during( 2016-2017). Midstream urine specimen was collected from children. Samples were subjected to nitrite test, culture and sensitivity. Results : There was significant bacteriuria in 17 (21.5%) children with SCA. A positive test for nitrite was obtained in 12 of the 17(70.5%) children. The nitrite test has a specificity of 95.2% in detecting bacteriuria, a sensitivity of 70.6%, a positive predictive value of 80% and a negative predictive value of 92%. A positive nitrite test was significantly associated with bacteriuria, while a negative test was also significantly associated with an absence of bacteriuria.

References used

ASINOBI AO, FATUNDE OJ, BROWN BJ, OSINUSI KA, PASINA NA .Urinary tract infection in febrile children with sickle cell anaemia in Ibadan, Nigeria. Ann Trop Paediatr 23(2): 2003;129 -34
BROWN BJ, ASINOBI AO, FATUNDE OJ,OSINUSI K, FASINA NA. Evaluation of the nitrite test in screening for urinary tract infection in febrile children with sickle cell anemia. Nig J Paediatr 31: 2004;10-13
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