Note Taking Guide:
Topic # 3053
Parasites
Animal Health Parasites
Their Life Cycles and Classification
Infectious Agents Causing Disease can be divided into
Three General groups:
1.
2.
3.
Bacteria
• Simple __________life
• Microscopic
• Can be and .
• Live outside of host
• Sensitive to antibiotics
Viruses
• Are Ultra-microscopic
• Live in of host cells
• Are resistant to antibiotics
• highly ______________
Parasites
• Live in, on, or at the _______________of the host.
• Infections develop slowly
• Difficult to eradicate completely
• Animals do not develop __________________
• Animals may not show symptoms
• Host-specific
• Include fungi, ___________, __________, and _________________
The Parasites in this Group
•
•
•
•
•
•
•
•
Non-infectious Agents That Cause Disease
•
• Poor Nutrition
• Injuries
• Physical stress from__________, conception,_____________, and birth
• Any other __________or ____________ that weakens the animal or its immune system
to secondary infections
Causes Of Disease
• Nutritional Defects
-
• Physiological Defects
• Morphological Defects
• Pathogenic Organisms
Life Cycle of Tapeworm in a Sheep
Ascarids
Strongyles
Beef and Pork Tapeworms
The Life Cycle of Flies
Occurs in Four Stages
Lice
Ticks