[Localization of urinary tract infection in children by immunofluorescent study of bacteriuria and measurement of humoral antibodies].

In 62 children presenting with a urinary infection, the immuno-fluorescent (I.F.) study of immunoglobulins fixed on the cell wall of urinary bacteria was performed jointly with the titration of serum antibodies towards the same bacteria. This study revealed that: 1. There was a correlation between I.F. and serodiagnosis in 82% of the cases. 2. There was a correlation between the localization of the urinary tract infection, as assessed by the classical biochemical means, and the results of I.F. and antibody measurements. Positivity of either I.F. or serodiagnosis, or of both tests, is significantly related with upper urinary tract infection wheras the negativity of the two tests is observed, at the exception of children under 1 year of age, in lower urinary tract infection. 3. There was a correlation between the site of infection and the results of I.F. and antibody measurements. In upper urinary tract infections, either I.F. or serological tests, or both are positive, whereas in lower urinary tract infections both tests are negative, except in children under the age of 1 year.