A must-have guide for any equine veterinarian, this is a practical and concise handbook on the control of equine parasites. It enables you to advise your clients effectively on evidence-based parasite control programs. The first section of the book reviews the basic biology of internal parasites and the factors influencing their transmission. The second section discusses the general principles of parasite control. The third section provides diagnostic and assessment tools for interpreting clinical, historical and laboratory information. Finally the fourth section contains 20 case studies reflecting the full range of parasites and providing detailed answers and discussions, providing you with the opportunity to practice the application of knowledge and illustrating the concepts of modern parasite control.

Handbook of Equine Parasite Control is an invaluable companion for equine veterinary practitioners, veterinary students, equine veterinary technicians and nurses, researchers in equine parasitology, horse owners, and farm and stable managers.

Preface vii

Acknowledgments ix

SECTION I Internal Parasites and Factors Affecting Their Transmission 1

1 Biology and Life Cycles of Equine Parasites 3

2 Pathology of Parasitism and Impact on Performance 24

3 Environmental Factors Affecting Parasite Transmission 45

4 Host Factors Affecting Parasite Transmission 53

5 Parasite Factors Affecting Transmission 58

SECTION II Principles of Equine Parasite Control 67

6 Decreasing Parasite Transmission by Nonchemical Means 69

7 Pharmaceutical Approaches to Parasite Control 80

SECTION III Diagnosis and Assessment of Parasitologic Information 101

8 Diagnostic Techniques for Equine Parasitism 103

9 Detection of Anthelmintic Resistance 128

10 Evaluating Historical Information 138

11 Synopsis of Evidence-Based Parasite Control 145

SECTION IV Case Histories 153

Case 1 Mystery Drug 155

Case 2 Pyrantel Efficacy Evaluation 158

Case 3 Egg Count Results From Illinois Yearlings 160

Case 4 Colic and Parasites 163

Case 5 Confinement after Deworming 166

Case 6 Abdominal Distress in a Foal 168

Case 7 Quarantining Advice 171

Case 8 Diarrhea and Colic 173

Case 9 Foal Diarrhea 176

Case 10 Oral Lesion 179

Case 11 Skin Lesion 181

Case 12 Legal Case 184

Case 13 Repeated Egg Counts 186

Case 14 Repeated Colic 189

Case 15 Ivermectin Efficacy 193

Case 16 Ten Commandments 195

Case 17 Ivermectin Egg Reappearance 198

Case 18 Name that Worm 201

Case 19 Parasite Control for Yearlings 203

Case 20 Reaction to Treatment 205

Index 207

Craig R. Reinemeyer graduated from the Ohio State University College of Veterinary Medicine in 1976, and spent 5 years in mixed animal practice before returning to OSU to pursue a PhD in veterinary parasitology. He was a faculty member of the University of Tennessee College of Veterinary Medicine from 1984 to 1998, and served as the President of the American Association of Veterinary Parasitologists from 2003 to 2004. In 1997, Dr. Reinemeyer founded East Tennessee Clinical Research, a contract research organization that conducts pharmaceutical studies to facilitate the development of new veterinary drugs. ETCR’s efforts have contributed to the approval of several currently marketed anthelmintics for horses, cattle, and pets.

Martin K. Nielsen is Assistant Professor in the Department of Veterinary Science of the Maxwell H. Gluck Equine Research Center at the University of Kentucky. He has a doctorate from the University of Copenhagen, and was a faculty member there for four years before moving to Kentucky. His research interests include endoparasite infections of horses, clinical and molecular diagnosis, epidemiology, surveillance, and control.