Which type of organisms are typically not present in urine?

The presence of bacteria in urine is a common finding, especially in cases of urinary tract infections. Typically, healthy urine collected via a clean catch method is sterile, meaning it should not contain any organisms when voided. However, if there is an infection, bacteria will be present in the urine, leading to an increase in the number of organisms detected.

In contrast, yeasts and fungi can also be found in urine, especially in certain clinical scenarios such as in immunocompromised patients or those with diabetes, where Candida species may colonize the urinary tract. Red blood cells in urine can indicate bleeding from the urinary tract and are usually considered abnormal if present in significant amounts.

Thus, the organisms that are typically not present in urine under normal circumstances can vary based on the clinical context, but the healthy urinary tract is expected to be free of them unless pathology is present.