Effect of fosfomycin trometamol on bacterial adhesion in comparison with other chemotherapeutic agents.

The effect of fosfomycin trometamol in comparison with that of norfloxacin and co-trimoxazole on the hemagglutination, yeast cell aggregation and adhesive properties of both gram-positive and gram-negative microorganisms was studied. The strains were isolated from the urine of patients with urinary tract infections, or from vaginal swabs. At sublethal concentrations (1/4 and 1/8 of the minimal inhibitory concentration), the ability of the bacteria to adhere to human uroepithelial cells was reduced by any of the 3 drugs assayed. The reduction corresponded to a decrease in the agglutinating activity of the gram-negative bacteria tested, such providing further evidence for the efficacy of the different chemoantibiotics. In particular, fosfomycin trometamol and norfloxacin proved to be more effective than co-trimoxazole in affecting the adhesive properties of all the strains employed.