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Development & Types of Immunity
Model Agricultural Core Curriculum: Supplement
University of California, Davis276.T1
The Body’s First Line of Defense
Skin: Covered with hair, feathers.
Mucous Coating that traps pathogens. Protects the Membranes: digestive tract and the tissues of the lungs.
Gut: Contains acids that destroy pathogens.
Cell Wall: Sometimes mucous coated and may contain cilia.
Coughing: Rids the body of disease organisms.
Urination: Cleans the ureter by washing pathogens out.
Development & Types of Immunity
Model Agricultural Core Curriculum: Supplement
University of California, Davis276.T2
The Body’s Second Line of Defense
White Blood Cells: Helps fight infection.
Lymphatic System: Filters undesirable pathogens out of the body.
Liver: Filters blood and detoxifies poisons.
Antibodies: Fights off pathogens.
Development & Types of Immunity
Model Agricultural Core Curriculum: Supplement
University of California, Davis276.T3
How Diseases Are Spread
• Direct contact.
• Contact with non-living objects: fence post, trucks.
• Infection from soil.
• Infection from food or water.
• Airborne infection.
• Infection from parasites: mosquitos, flies.
Development & Types of Immunity
Model Agricultural Core Curriculum: Supplement
University of California, Davis276.T4
Good Management Skills
• Be alert to signs of ill health.
• Provide clean, disinfected quarters.
• Provide adequate ventilation.
• Provide proper drainage for holding areas, barns.
• Protect them from the sun.
Development & Types of Immunity
Model Agricultural Core Curriculum: Supplement
University of California, Davis276.T5
• Practice rigid sanitation & manure removal pocedures.
• Provide a well balanced diet.
• Get accurate diagnosis of health problems immediately.
• Avoid unnecessary stress and strain.
• Buy disease-free stock from healthy herds and flocks.
Good Management Skills, cont’d.
Development & Types of Immunity
Model Agricultural Core Curriculum: Supplement
University of California, Davis276.T6
Good Management Skills, cont’d.
• Isolate new animals for a period of time before introducing them to your herd or flock.
• Follow a set vaccination program.
• Be cautious of visitors from other operations.
• Dispose of dead animals immediately.