[Urinary infections in children].

The E. Coli antibody response was studied in 81 infants and children with urinary tract infection. An haemagglutination technique was used. The antigen used was the bacteria present in urine. The correlation between the site of infection and response of haemagglutinating antibodies was statistically demonstrated. In some cases, the antibody titers were followed for several weeks, allowing an appreciation on the effectiveness of treatment. On the other hand, the correlation between serology and some of the results emphasize the interest of these tests in the general investigation of urinary tract infection in childhood.