Two Sides of a Coin: a Zika Virus Mutation Selected in Pregnant Rhesus Macaques Promotes Fetal Infection in Mice but at a Cost of Reduced Fitness in Nonpregnant Macaques and Diminished Transmissibility by Vectors
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- Univ. of California, Davis, CA (United States). School of Veterinary Medicine. Dept. of Pathology, Microbiology and Immunology; OSTI
- Univ. of California, Davis, CA (United States). School of Veterinary Medicine. Dept. of Pathology, Microbiology and Immunology
- Univ. of California, Davis, CA (United States). California National Primate Research Center
- Univ. of California, Davis, CA (United States). California National Primate Research Center
- Univ. of California, San Francisco, CA (United States). Dept. of Lab. Medicine
- Scripps Research Institute, San Diego, CA (United States)
- Scripps Research Institute, San Diego, CA (United States); Yale Univ., New Haven, CT (United States). School of Public Health. Dept. of Epidemiology of Microbial Diseases
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- National Institutes of Health (NIH), Bethesda, MD (United States). National Institute of Allergy and Infectious Diseases. Lab. of Infectious Diseases
Although Zika virus infection of pregnant women can result in congenital Zika syndrome, the factors that cause the syndrome in some but not all infected mothers are still unclear. We identified a mutation that was present in some ZIKV genomes in experimentally inoculated pregnant rhesus macaques and their fetuses. Although we did not find an association between the presence of the mutation and fetal death, we performed additional studies with ZIKV with the mutation in nonpregnant macaques, pregnant mice, and mosquitoes. We observed that the mutation increased the ability of the virus to infect mouse fetuses but decreased its capacity to produce high levels of virus in the blood of nonpregnant macaques and to be transmitted by mosquitoes. This study shows that mutations in mosquito-borne viruses like ZIKV that increase fitness in pregnant vertebrates may not spread in outbreaks when they compromise transmission via mosquitoes and fitness in nonpregnant hosts.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- National Institutes of Health (NIH); US Centers for Disease Control and Prevention (CDC); USDOE Office of Science (SC)
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1817081
- Journal Information:
- Journal of Virology, Journal Name: Journal of Virology Journal Issue: 24 Vol. 94; ISSN 0022-538X
- Publisher:
- American Society for MicrobiologyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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