The modified immunoenzymatic method for detection of antibody coated bacteria (IP ACB) was compared with immunofluorescence technique (IF ACB) in the diagnosis of urinary tract infection. For the study 100 patients were employed with significant and insignificant bacteriuria. It was found that 81% of the results obtained by IP ACB and IF ACB were identical, however the immunoenzymatic method was more sensitive than immunofluorescence. Moreover, the IP ACB technique is simpler, less time consuming and may be performed by using the ordinary optic microscope.