Question 1 How common is co-existing meningitis in infants with urinary tract infection?

How to use… lumbar puncture in children

“…Up to 2% of infants less than 3 months with UTI have coexisting meningitis . 18 The febrile infant under the age of 3 months can be difficult to assess, as pain and pyrexia can cause irritability, clouding the clinical picture. In these infants there is evidence suggesting LP should be performed to look for coexisting meningitis.…”

From the microbiome to the central nervous system, an update on the epidemiology and pathogenesis of bacterial meningitis in childhood

“…The second potential site of colonization is the urinary tract, which may harbor asymptomatic bacteriuria 129 , 130 . Ascending infection can lead to seeding of the kidney, bacteremia, and then meningitis, as around 13.2% of febrile young infants will present with a urinary tract infection, and a smaller subset will have simultaneous evidence of bacteriuria, bacteremia, and meningitis 44 , 131 .…”

Consenso para el uso adecuado de antibióticos en el niño menor de 36 meses con fiebre sin foco de infección evidente. Texto completo

“…Existe evidencia que avala el abordaje ambulatorio de los niños mayores de 2 meses con ITU, en buen estado general y con seguimiento asegurado, sin realizar hemocultivos ni PL. [18][19][20][21] Con respecto al riesgo de neumonía, se recomienda solicitar radiografía de tórax con recuento de leucocitos mayores de 20 000/mm 3 , dado el riesgo de neumonía oculta (nivel de evidencia ii). 22 La identificación de infección viral disminuye, pero no descarta la posibilidad de IBG.…”