[Cytomegalovirus transmission by fresh blood].

Investigations included blood donors for extracorporeal circulation, as well as patients (12) before and after cardiopulmonary by-pass. CMV infection is a frequent consequence of multiple fresh blood transfusions in persons with aortocoronary "by-pass" in 25% operated patients. If a patient receives more than 10 transfusions of fresh blood, frequency of serologically positive reactions to CMV is found in approximately 40-60% operated patients.