1. Animal Health Parasites Their Life Cycles and Classification

2. Infectious Agents Causing Disease can be divided into Three General Groups: Bacteria Viruses Parasites

3. Bacteria Simple plant life Microscopic Can be Pathogenic and beneficial Live outside of host Sensitive to antibiotics

4. Viruses Are Ultra-microscopic Live in tissue of host cells Are resistant to antibiotics highly contagious

5. Parasites Live in, on, or at the expense of the host. Infections develop slowly Difficult to eradicate completely Animals do not develop resistance Animals may not show symptoms Host-specific Include fungi, protozoa, arthropods, and helminths Bot fly common horse parasite

6. The Parasites in this Group Cause tissue damage Absorb nutrients Suck blood and lymph Obstruct passages Causes growths General irritation Secondary infections Cause serious economic damage

7. Non-infectious Agents That Cause Disease Chemical and poisons Poor Nutrition Injuries Physical stress from breeding, conception, lactation, and birth Any other stress or trauma that weakens the animal or its immune system to secondary infections

8. Causes Of Disease Nutritional Defects –Result from unbalanced diets Physiological Defects –Improper functioning of body parts Morphological Defects –Physical disabilities Pathogenic Organisms –Tiny living things capable of causing disease

10. Life Cycle of Tapeworm in a Sheep

12. Ascarids

13. Strongyles

14. Beef and Pork Tapeworms

15. The Life Cycle of Flies Occurs in Four Stages

18. Lice

19. Ticks Tick infested horse