Consulting Editor

CONSULTING EDITOR ROBERT A. SMITH, DVM, MS, Diplomate, American Board of Veterinary Practitioners; and Associate Professor and McCasland Foundation Chair, Department of Veterinary Clinical Sciences, Oklahoma State University College of Veterinary Medicine, Stillwater, Oklahoma

GUEST EDITOR R. GAYMAN HELMAN, DVM, PhD, Diplomate, American College of Veterinary Pathologists; Pathologist and Assistant Director, Oklahoma Animal Disease Diagnostic Laboratory; and Professor, Department of Veterinary Anatomy, Pathology, and Pharmacology, Oklahoma State University College of Veterinary Medicine, Oklahoma State University, Stillwater, Oklahoma

CONTRIBUTORS ELLEN B. BELKNAP, DVM, MS, Diplomate, American College of Veterinary Internal Medicine; and Visiting Assistant Professor, Department of Large Animal Surgery and Medicine, Auburn University College of Veterinary Medicine, Auburn, Alabama PATRICIA CAREY BLANCHARD, DVM, PhD, Professor and Branch Chief, California Veterinary Diagnostic Laboratory System Tulare Branch, University of California-Davis, Tulare, California VICKIE L. COOPER, DVM, Diagnostic Pathologist, Oklahoma Animal Disease Diagnostic Laboratory, Oklahoma State University College of Veterinary Medicine, Stillwater, Oklahoma ALAN R. DOSTER, DVM, PhD, Diplomate, American College of Veterinary Pathologists; Professor, Department of Veterinary and Biomedical Sciences, and Director, Veterinary Diagnostic Center, University of Nebraska-Lincoln, Lincoln, Nebraska TAM GARLAND, DVM, PhD, Dipl. ABVT, Diplomate, American Board of Veterinary Toxicology; and Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine, Texas A&M University, College Station, Texas R. GAYMAN HELMAN, DVM, PhD, Diplomate, American College of Veterinary

Pathologists; Pathologist and Assistant Director, Oklahoma Animal Disease Diagnostic Laboratory; and Professor, Department of Veterinary Anatomy, Pathology,

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