1. Department of Pathobiology, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
2. Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
3. Department of Pathology, Immunology, and Laboratory Medicine, College of Medicine, University of Florida, Gainesville, FL 32610, USA
4. Mycoplasma Section, National Institute of Allergy and Infectious Diseases, Frederick, MD 21702, USA