Urine Culture
A bacterium known as Escherichia coli (E. coli) causes the majority of lower urinary tract infections (UTIs). Fortunately, this microorganism is treatable with several antibiotics, including trimethoprim-sulfamethoxazole, ciprofloxacin, and nitrofurantoin. For most people the infection will be easily eliminated with one of these antibiotics. Some doctors prescribe an antibiotic without performing a urine culture but the test can definitively identify a UTI.
The urine culture tests for the presence of a single type of bacteria. If high counts are found the test is generally considered a positive urine culture. If there are multiple bacteria strains, the culture may have been contaminated and the urine culture may need to be redone. Symptoms of a UTI include pain and burning when urinating and a frequent urge to urinate. If symptoms are present, but the urine culture is negative, you may want to consult your doctor who may order a specialized urine culture to look for a wider range of the non-diluted urine to determine if bacteria at lower counts or other microorganisms may be causing the symptoms. The presence of low number of bacteria and the presence of white blood cells may indicate a condition known as acute urethral syndrome.