[1] Ohio State Univ, Dept Vet Prevent Med, Columbus, OH 43210 USA
[2] Georgetown Univ, Dept Biol, Washington, DC 20057 USA
[3] NIH, Fogarty Int Ctr, Bldg 10, Bethesda, MD 20892 USA
[4] Univ Nottingham, Sch Vet Med, Bonington, Leics, England
[5] Ohio State Univ, Dept Anthropol, Columbus, OH 43210 USA
[6] Ohio State Univ, Dept Geog, Columbus, OH 43210 USA
[7] Massey Univ, Inst Vet Anim & Biomed Sci, Epictr, Palmerston North, New Zealand
[8] Ohio State Univ, Publ Hlth Preparedness Infect Dis Program, Columbus, OH 43210 USA