Backyard Poultry Disease Discussion. Backyard... · Backyard Poultry Disease Discussion Mohamed...
Transcript of Backyard Poultry Disease Discussion. Backyard... · Backyard Poultry Disease Discussion Mohamed...
Backyard Poultry Disease Discussion
Mohamed El-Gazzar, DVM, MAM, PhD, Dipl. ACPV
Assistant ProfessorISU Poultry Extension Vet
We will try to answer these questions
• What causes poultry diseases?
• How do we know that birds are sick?
• How do they infect our birds?
• What can we do about Disease?
Poultry Diseases
• Nutritional
• Genetic/Developmental
• Environmental
• Reproductive
• Behavioral
• Infectious
Environmental Causes
• Temperature (Heat stasis – Ascites)
• Obnoxious gases (Ammonia – Carbon Dioxide)
• Housing related (bumble foot)
Toxic Causes
• Biological (Botulism)
• Environmental (Lead – Arsenic)
• Chemical (Antibiotics – insecticides)
Infectious Poultry Diseases
• Viral (Influenza – Newcastle)
• Bacterial (Cholera – Coriza)
• Fungal (Aspergillosis)
• Protozoal (Coccidiosis)
• Parasitic (Ascarediosis)
Respiratory Lesions
Turbinate
Normal Trachea
Inflamed Trachea
Early Airsacculitis
Polyserositis Pnuemonia
Disease Transmission
• Direct Transmission: direct physical contact
• Indirect Transmission: through indirect transportation vehicles
Direct Transmission
• Contact:– Other poultry– Wild birds (Open Water Bodies)– Captive birds– Animals and human
• Multispecies or multiages• Day old birds• Newly acquired birds• Birds when back from:
–Show–Market–Fair
Indirect Transmission
• Potential vehicles for Indirect Transmission:1. Human
2. Domestic animals including pets
3. Wild animals including varmints and rodents
4. Inanimate objects including equipment
5. Feed
6. Water
7. Air
8. Environments including shared pastures and water ponds
Biosecurity
• Prevent pathogen access
• Sterility is not the target
• Control specific pathogens
• General sanitary practices
Specific poultry pathogens
• What is the source of these pathogens??
– Poultry
– Birds
– Animals
– Humans
Chicks
Other Poultry
and Animals
Feed and
Water PeopleManure
Insects
HatcheryVehicles and
EquipmentWild
BirdsVaccines &
Equipment
Rodents
Housing
Summary• Many causes of disease
• Microbes
• Infect birds and we can’t see them
• Present in affected body system
• But biosecurity could stop it
• Worse case vs ideal situation