Aphlebotomist, a person trained to draw blood samples for medical use and testing, washed and reused needles while employed at a blood bank. what could be a resulting medical risk posed by reusing needles? the detergents used to clean the needles could cause severe allergic reactions in blood donors. genetic mutations may affect patients who receive blood drawn with these needles. blood donors could contract blood-borne illnesses from the needles and become very sick. patients with low immunity resistance could contract infections from germs on the needles.