4.4 Article

Prior Dengue Virus Infection Is Associated With Increased Viral Load in Patients Infected With Dengue but Not Zika Virus

Journal

OPEN FORUM INFECTIOUS DISEASES
Volume 6, Issue 7, Pages -

Publisher

OXFORD UNIV PRESS INC
DOI: 10.1093/ofid/ofz320

Keywords

antibody-dependent enhancement; Puerto Rico; viral load; Zika virus

Funding

  1. US Centers for Disease Control and Prevention

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To evaluate potential enhancement of Zika virus (ZIKV) infection among patients with prior dengue virus (DENV) infection, we compared loads of viral RNA among patients infected with ZIKV (n = 1070), DENV-2 (n = 312), or DENV-3 (n = 260). Compared to patients without prior DENV infection, patients with prior DENV infection had significantly higher mean loads of viral RNA if infected with DENV-2 (10.6 vs 11.6 log(10) GCE/mL, respectively; t test, P < .0001) or DENV-3 (10.3 vs 10.9 log(10) GCE/mL; P < .0001), but not ZIKV (4.7 vs 4.7 log(10) GCE/mL; P = .959). These findings provide evidence against in vivo enhancement of ZIKV by anti-DENV antibodies.

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