S García-Bujalance1, A Gutiérrez-Arroyo2, F De la Calle3, M Díaz-Menéndez3, Jose R Arribas3, J García-Rodríguez2, M Arsuaga3. 1. Department of Microbiology and Parasitology, Hospital Universitario La Paz-H, Carlos III, IdiPAZ, Madrid, Spain. Electronic address: sgbujalance@salud.madrid.org. 2. Department of Microbiology and Parasitology, Hospital Universitario La Paz-H, Carlos III, IdiPAZ, Madrid, Spain. 3. Infectious Diseases Unit, Department of Internal Medicine, Hospital Universitario La Paz-H, Carlos III, IdiPAZ, Madrid, Spain.
Abstract
BACKGROUND: There are limited data about the persistence and infectivity of Zika virus in semen of symptomatic travelers returning from endemic areas and even less data in asymptomatic cases. OBJECTIVE: We investigated the persistence and infectivity of ZIKA virus in semen in five patients with Zika virus infection returning to Spain from endemic areas. STUDY DESIGN: We evaluated the epidemiological, clinical and virological characteristic of the five patients. In semen we detected ZIKA virus by PCR, partial sequencing and cell culture. We also performed phylogenetic analysis. RESULTS: We detected Zika virus RNA (Asian lineage) by PCR in semen samples from day 14th to day 96th since the day of illness onset. Semen viral culture was positive for Zika virus in two patients at days of illness 30 and 69 by virus propagation. Phylogenetic analysis strongly suggested male to female sexual transmission in a couple returning from Maldives. CONCLUSION: This case series confirms that Zika virus RNA can be detected in semen up to three months after infection. Viral culture of semen samples shows prolonged infectivity that can lead to sexual transmission of Zika virus.
BACKGROUND: There are limited data about the persistence and infectivity of Zika virus in semen of symptomatic travelers returning from endemic areas and even less data in asymptomatic cases. OBJECTIVE: We investigated the persistence and infectivity of ZIKA virus in semen in five patients with Zika virus infection returning to Spain from endemic areas. STUDY DESIGN: We evaluated the epidemiological, clinical and virological characteristic of the five patients. In semen we detected ZIKA virus by PCR, partial sequencing and cell culture. We also performed phylogenetic analysis. RESULTS: We detected Zika virus RNA (Asian lineage) by PCR in semen samples from day 14th to day 96th since the day of illness onset. Semen viral culture was positive for Zika virus in two patients at days of illness 30 and 69 by virus propagation. Phylogenetic analysis strongly suggested male to female sexual transmission in a couple returning from Maldives. CONCLUSION: This case series confirms that Zika virus RNA can be detected in semen up to three months after infection. Viral culture of semen samples shows prolonged infectivity that can lead to sexual transmission of Zika virus.
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