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Volume 24, Number 9—September 2018

Dispatch

Use of Favipiravir to Treat Lassa Virus Infection in Macaques

Kyle Rosenke, Heinz FeldmannComments to Author , Jonna B. Westover, Patrick William Hanley, Cynthia Martellaro, Friederike Feldmann, Greg Saturday, Jamie Lovaglio, Dana P. Scott, Yousuke Furuta, Takashi Komeno, Brian B. Gowen, and David SafronetzComments to Author 
Author affiliations: National Institutes of Health, Hamilton, Montana, USA (K. Rosenke, H. Feldmann, P.W. Hanley, C. Martellaro, F. Feldmann, G. Saturday, J. Lovaglio, D.P. Scott); University of Manitoba, Winnipeg, Manitoba, Canada (H. Feldmann, D. Safronetz); Utah State University, Logan, Utah, USA (J.B. Westover, B.B. Gowen); Toyama Chemical Co., Ltd., Toyama, Japan (Y. Furuta, T. Komeno); Public Health Agency of Canada, Winnipeg (D. Safronetz)

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Figure 2

Histologic and in situ hybridization analyses of livers from cynomolgus macaques infected with Lassa virus (LASV) (1 × 104 50% tissue culture infective dose [TCID50]) and treated 1 time daily with favipiravir (treated) or vehicle only (control). A–B) Histologic analyses. A) Control, showing multifocal neutrophilic infiltrates with hepatocyte necrosis and degeneration (original magnification ×40). Inset shows hepatocyte necrosis (original magnification ×400). B) Treated, showing essentially healt

Figure 2. Histologic and in situ hybridization analyses of livers from cynomolgus macaques infected with Lassa virus (LASV) (1 × 104 50% tissue culture infective dose [TCID50]) and treated 1 time daily with favipiravir (treated) or vehicle only (control). A–B) Histologic analyses. A) Control, showing multifocal neutrophilic infiltrates with hepatocyte necrosis and degeneration (original magnification ×40). Inset shows hepatocyte necrosis (original magnification ×400). B) Treated, showing essentially healthy hepatic tissue (original magnification ×40). Inset shows healthy hepatic tissue (original magnification ×400). C–D) In situ hybridization analyses. C) Control, showing multifocal and coalescing viral RNA detected within hepatocytes (original magnification ×100). D) Treated, showing no viral RNA detected (original magnification ×100).

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