How do doctors diagnose utis?

Symptoms & Urine. Dr. First suspects UTI from symptoms: burning with urination, frequency of urination, pelvic & suprapubic pain, cloudy foul smelling urine, blood in urine, constipation etc.. Then performs a urinalysis, bacteruria & white blood cells show on urine test strip. Bacteria can be seen under a microscope on spun urine (now seldom done in dr.S offices). Finally grow or send a urine culture..
Urine tests. The definite answer is from a test called a "urine culture", which allows bacteria (if present) to grow in an incubator. Since that takes a few days, we also rely on a quick "urinalysis" to give hints about whether a UTI is likely or not.
Lab tests. History and physical examination are useful. Urinalysis and urine culture are more precise.
Urinalysis, culture. Urinary tract infections (utis) may cause a variety of symptoms in men or women (urinary burning, frequency for example). Utis are diagnosed by two tests: urinalysis and urine culture. Urinalysis (to see properties of urine including ph, blood, sugar, and inflammation/infection) and urine culture (to check for specific bacteria or fungal infection) and sensitivity to antibiotics.
Urine culture. Urinary tract infections are diagnosed by obtaining a culture of the urine. Sometimes a physician can do a quick urinalysis in the office but the most accurate test is the culture which usually takes 2-3 days. If a physician suspects a uti, they will often start treatment while waiting on the results of the urine culture.