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Viruses 2018, 10(11), 642;

Intramuscular Exposure of Macaca fascicularis to Low Doses of Low Passage- or Cell Culture-Adapted Sudan Virus or Ebola Virus

Department of Virology and Immunology, Texas Biomedical Research Institute, San Antonio, TX 78227, USA
Current Affiliation: Graduate School of Biomedical Sciences, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
Current Affiliation: Institute of Environmental Health, 9330 Corporate Drive, Selma, TX 78154, USA
Current Affiliation: National Institute of Allergy and Infectious Diseases (NIAID), Integrated Research Facility, Division of Clinical Research, 8200 Research Plaza, Fort Detrick, MD 21702, USA
Current Affiliation: Department of Microbiology and National Emerging Infectious Diseases Laboratories, Boston University School of Medicine, 620 Albany St, Boston, MA 02118, USA
Author to whom correspondence should be addressed.
Received: 19 October 2018 / Revised: 13 November 2018 / Accepted: 14 November 2018 / Published: 16 November 2018
(This article belongs to the Collection Advances in Ebolavirus, Marburgvirus, and Cuevavirus Research)
PDF [2055 KB, uploaded 16 November 2018]


The filoviruses Ebola virus (EBOV) and Sudan virus (SUDV) can cause severe diseases, and there are currently no licensed countermeasures available for use against them. Transmission occurs frequently via contact with bodily fluids from infected individuals. However, it can be difficult to determine when or how someone became infected, or the quantity of infectious virus to which they were exposed. Evidence suggests the infectious dose is low, but the majority of published studies use high exposure doses. This study characterized the outcome of exposure to a low dose of EBOV or SUDV, using a Macaca fascicularis model. Further, because the effect of virus passage in cell culture may be more pronounced when lower exposure doses are used, viruses that possessed either the characteristics of wild type viruses (possessing predominantly 7-uridine (7U) genotype and a high particle-to-plaque forming unit (PFU) ratio) or cell culture-passaged viruses (predominantly 8-uridine (8U) genotype, a lower particle-to-PFU ratio) were used. The time to death after a low dose exposure was delayed in comparison to higher exposure doses. These data demonstrated that an extremely low dose of EBOV or SUDV is sufficient to cause lethal disease. A low dose exposure model can help inform studies on pathogenesis, transmission, and optimization of prevention strategies. View Full-Text
Keywords: Ebola virus; Sudan virus; nonhuman primate model; low dose Ebola virus; Sudan virus; nonhuman primate model; low dose

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Alfson, K.J.; Avena, L.E.; Beadles, M.W.; Worwa, G.; Amen, M.; Patterson, J.L.; Carrion, R., Jr.; Griffiths, A. Intramuscular Exposure of Macaca fascicularis to Low Doses of Low Passage- or Cell Culture-Adapted Sudan Virus or Ebola Virus. Viruses 2018, 10, 642.

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