Leukocytes

The leukocytes can be divided into several subgroups. The largest subgroup in terms of numbers are the so-called granulocytes. They are especially important for the prevention of infections caused by bacteria, viruses, fungi or parasites.

The leukocytes can recognize and destroy foreign structures. In the case of infection or inflammation, therefore, there is an increase in white blood cells.

If one finds a high number of leukocytes (white blood cells) in the urine sample, one also speaks of a leukocyturia. This is usually caused by a bacterial infection of the kidneys and / or urinary tract. But other inflammatory processes of the urinary system can also increase the number of leukocytes in the urine.

A small amount of white blood cells (up to 10 leukocytes per microliter) in the urine is normal, since leukocytes are constantly re-formed and survive only for a limited time. Dead or damaged leukocytes are excreted from the body through the kidneys and finally through the urine. This happens on an ongoing basis.

Among the most common causes of increased values are bacterial infections

• of the urinary tract (bladder, ureter, urethra) or kidneys, as well as
• in men of the prostate or epididyly testicles (rather less often).

In the case of a positive finding, the urine is often also examined in the laboratory and the number of leukocytes is determined.