1. Nano Therapeutics Research Lab, Department of Chemistry, University of Georgia, Athens, GA 30602, USA. Fax: +1 706 542-9454; Tel: +1 706 542-1012
2. Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA
3. Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA