Which condition is a sign of urinary tract infection marked by painful urination and pus in the urine?

The condition described is pyuria, which is characterized by the presence of pus in the urine, an indication of infection or inflammation in the urinary tract. When an individual has urinary tract infection, the body often responds by producing pus as a reaction to the infection-causing bacteria, leading to symptoms that include painful urination. Therefore, pyuria is not only a physical finding but also correlates with the symptomatic experience of painful urination associated with urinary infections.

Oliguria involves a significant decrease in urine output,which does not directly relate to symptoms of pain or pus in the urine. Enuresis refers to involuntary urination and usually does not pertain to infection signs. Cystitis, while it is indeed an inflammation of the bladder that can accompany urinary tract infections, does not explicitly describe the presence of pus in the urine. Thus, choosing pyuria effectively identifies the condition that specifically aligns with both the symptoms and the laboratory findings described.