The median urinary IL-8 concentration for the bacterial UTI group (n = 32) was 5809 pg/ml (range 0 to 347,368 pg/ml) vs. 0 (range 0 to 2231 pg/ml) for the controls (n = 32), P < 0.0001. The gene discussed is CXCL8; the disease is bacterial urinary tract infection.