Controlling External Parasites

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Controlling External Parasites

• 4-H Veterinary Science
• Extension Veterinary Medicine
• Texas AgriLife Extension Service
• College of Veterinary Medicine and Biomedical
  Sciences
• Texas AM System
• http//aevm.tamu.edu

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Objectives

• Describe environmental management practices used
  to control external parasites
• Describe strategic administration of chemicals to
  control external parasites

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Life Cycle of External Parasites
Host Entry
Exit
Environment
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Life Cycle of External Parasites
Host Contact
Contact
Host
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Life Cycle of External Parasites
Environment Attack Host
Attack
Host Environment
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Break Life Cycle of External Parasites

• Reduce contamination of environment outside of
  animal
• Environment nutrition
• Environment sanitation
• Manure, mud, water
• Host chemicals
• Optimal conditions, positive tests
• Environment chemicals

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• Reduce suitability of environment inside of
  animal
• Host nutrition

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• Increase resistance of animal
• Host nutrition

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