C. H. Gardiner,¹ George D. Imes,² Elliott R. Jacobson,³ Chris M. Foggin<sup>4

1</sup>Department of Parasitology, Naval Medical Research Institute Detachment, Lima, Peru, APO Miami, Florida 34031, USA
²Department of Veterinary Pathology, Armed Forces Institute of Pathology, Washington, D.C. 20306, USA
³Department of Special Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32610, USA
⁴Veterinary Research Laboratory, P.O. Box 8101 Causeway, Zimbabwe