Community living paraplegic and tetraplegic men and women (18 years and above) who present to their family physician or specialist with symptomatic UTI will be prescribed an antibiotic treatment for up to 14 days (using the drug of choice i.e. which the treating physician deems appropriate) and randomized to also receive by mouth two capsules containing placebo or probiotic Lactobacillus rhamnosus GR-1 and L. reuteri RC-14 daily.