ALAN WOOLF,^* JOHN KING,^** BUD TENNANT<sup>***


*</sup>Cooperative Wildlife Research Laboratory, Southern Illinois University, Carbondale, Illinois 62901, USA.
^**Department of Pathology, New York State College of Veterinary Medicine, Cornell University, Ithaca. New York 14853, USA.
^***Department of Clinical Sciences, New York State College of Veterinary Medicine, Cornell University, Ithaca, New York 14853, USA.