Development & Types of Immunity
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.
Model Agricultural Core Curriculum: Supplement
University of California, Davis
276.T1
Development & Types of Immunity
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.
Model Agricultural Core Curriculum: Supplement
University of California, Davis
276.T2
Development & Types of Immunity
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.
Model Agricultural Core Curriculum: Supplement
University of California, Davis
276.T3
Development & Types of Immunity
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.
Model Agricultural Core Curriculum: Supplement
University of California, Davis
276.T4
Development & Types of Immunity
Good Management Skills, cont’d.
• 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.
Model Agricultural Core Curriculum: Supplement
University of California, Davis
276.T5
Development & Types of Immunity
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.
Model Agricultural Core Curriculum: Supplement
University of California, Davis
276.T6