Venereal causes of cytomegalovirus mononucleosis.

Cytomegalovirus (CMV) mononucleosis developed in two men after sexual contact with a woman who had had a similar but medically unverified illness several months before. The CMV was cultured from the woman's urine and cervix. Evidence of recent infection with CMV was also found in a new sexual contact of one of the men. However, roommates of the infected patients remained well, and serologic evidence of CMV infection failed to develop. This small outbreak suggests that CMV may be acquired as a venereal infection that sometimes progresses to the mononucleosis syndrome.