1. Department of Microbiology, Immunology, and Biochemistry, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA
2. Centro Para El Desarrollo de Investigación Científica, Asunción C.P. 1255, Paraguay
3. Regional Biocontainment Laboratory, University of Tennessee Health Science Center, Memphis, TN 38163, USA
4. Institute for the Study of Host-Pathogen Systems, University of Tennessee Health Science Center, Memphis, TN 38163, USA