White blood cells, or leukocytes are not normally present in urine, but they would appear when there is an infection of the urinary tract.
White blood cells inside this urine may be a sign of bacterial infection-related kidney as well as urinary inflammation. However, it's crucial to keep in mind any contamination of such urine might also result in the appearance of white blood cells, thus utilize adequate aseptic technique while providing the sample.
Hemoglobin as well as red blood cells are typically absent from urine. Blood cells cannot pass from the blood toward the urine because of healthy kidneys. A disease may be indicated by even slight rises in the amount of hemoglobin or red blood cells in urine.
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