- 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 25 3 Environmental Factors Affecting Parasitic Transmission 45 4 Host Factors Affecting Parasite Transmission 55 5 Parasite Factors Affecting Transmission 61 - Section II : Principles of Equine Parasite Control 69 6 Decreasing Parasite Transmission by Non-chemical Means 71 7 Pharmaceutical Approaches to Parasite Control 81 Section III : Diagnosis and Assessment of Parasitologic Information 99 8 Anthelmintic Resistance 101 9 Diagnostic Techniques 113 10 Detection of Anthelmintic Resistance 141 11 Evaluating Historical Information 149 12 Synopsis of Evidence - Based Parasite Control 155 Section IV : Case Histories 163 Case 1: Mystery Drug 165 Case 2: Pyrantel Efficacy Evaluation 167 Case 3: Egg Count Results from Yearlings 169 Case 4: Peritonitis and Parasites 173 Case 5: Confinement after Deworming 177 Case 6: Abdominal Distress in a Foal 179 Case 7: Quarantining Advice 181 Case 8: Diarrhea and Colic 183 Case 9: Foal Diarrhea 187 Case 10: Oral Lesion 191 Case 11: Skin Lesion 193 Case 12: Legal Case 197 Case 13: Repeated Egg Counts 199 Case 14: Repeated Colic 201 Case 15: Ivermectin Efficacy 205 Case 16: Anthelmintic Treatments in Foals 207 Case 17: Ivermectin Egg Reappearance 209 Case 18: Name That Worm 211 Case 19: Parasite Control for Yearlings 213 Case 20: Reaction to Treatment 215 Case 21: Anthelmintic Toxicosis? 217 Case 22: Deworming Program Adjustment? 219 Glossary 221 Index