Detection of Zika Virus in Semen
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As an increasing number of autochthonous Zika virus infections are reported from several South America countries (1), we read with interest the report from Musso et al. on the potential sexual transmission of Zika virus (2). We report additional evidence for this potential route of transmission after identification of an imported case of infection into the United Kingdom. After an outbreak alert for Zika in French Polynesia, active screening was implemented at Public Health England (Porton Down, United Kingdom). In 2014, a 68-year-old man had onset of fever, marked lethargy, and an erythematous rash 1 week after returning from the Cook Islands. Serum samples taken 3 days into the febrile illness tested negative for dengue and chikungunya viruses by real-time reverse transcription PCR (rRT-PCR). Test results for dengue virus IgM and chikungunya virus IgM also were negative; a test result for dengue virus IgG was indeterminate.