Forster CS, Loechtenfeldt AM, Shah SS, et al. - Researchers conducted the study for comparing urine neutrophil gelatinase-associated lipocalin (NGAL) concentrations in matched urine samples in girls with single and recurrent urinary tract infections (UTIs). Qualified for registration were girls less than 6 years of age who had signs and symptoms of UTI. Acute and follow-up urine NGAL concentrations were contrasted between girls with single and recurrent UTIs, as well as those with negative cultures who served as controls. Seventy girls were involved in this research, 6 controls, 43 single UTIs, and 20 girls with recurrent UTIs. There is no difference in urine NGAL concentrations between those with single and recurrent UTIs in this cohort of girls less than 6 years of age.