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The association between Zika virus (ZIKV) infection and congenital malformations such as microcephaly in infants is a public health emergency. Although various  in vivo  and  in vitro  models are used for ZIKV research, few animal models are available for resolving the effects of maternal ZIKV infection on neonatal development. Here, we established an immunocompetent mouse model via intrauterine inoculation. Our results confirmed that ZIKV, but not dengue virus, infection caused spontaneous abortions, brain malformations, ocular abnormalities, spinal cord defects and paralysis in mouse offspring. Aside from microcephaly and hippocampal dysplasia, eye abnormalities, including microphthalmia, thinner optic nerves, damaged retinae, and deficient visual projection, were also observed following ZIKV infection. Moreover, ZIKV-infected offspring showed a loss of alpha motor neurons in the spinal cord and cerebellar malformation, which may cause paralysis. ZIKV also impaired adult neurogenesis in neonatal mice. Due to its intact immunity, our rodent model can be used to systematically evaluate the impact of ZIKV on embryonic and neonatal development and to explore potential therapies.

Vertical Transmission of the Zika Virus Causes Neurological Disorders in Mouse Offspring