WBC count or concentration refers to the presence of White Blood Cells (also known as leukocytes or pus cells) in the semen. They appear when there is an infection, and can indicate that the patient suffers from leukocytospermia or pyospermia. If this is the case, your doctor will prescribe antibiotics to destroy the bacteria and erradicate the infection. This will prevent the infection from spreading through the rest of the patient's body.
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