They are not found in the urine of a healthy person. A positive result indicates the presence of an infection in the urinary tract.
Hemoglobin.
Normally, there is no hemoglobin in the urine. Usually its presence indicates hemolytic anemia.
Erythrocytes.
In a healthy person, erythrocytes in the urine are either absent, or 1-2 cells are found in the field of view.
An increase in the number of red blood cells (hematuria) occurs with kidney diseases and diseases of the urinary system.