Upload
sarah-taylor
View
213
Download
1
Embed Size (px)
Citation preview
Poultry Improvement Project
Viral Diseases and Non Infectious Diseases
Marek’s Disease
• Causes and Symptoms• Caused by the Herpes virus.
• Symptoms are sudden death, loss of weight, diarrhea, paralysis of legs or wings. Skin lesions may occur as young as 5 to 8 weeks.
Marek’s Disease
• Prevention• Vaccination.
• Antibiotics do not work on viral diseases.
Newcastle Disease
• Causes and Symptoms• Caused by a virus.
• Symptoms include sneezing and droopiness, muscular incoordination (neck and legs), tremors, paralysis.
Newcastle Disease
• Diagnosis and Prevention• Diagnosis is a serum neutralization test.
• Prevention is a vaccination.
Fowl Pox
• Symptoms• Symptoms are small to yellow blisters on comb and
wattles which will scab over.
Fowl Pox
• Diagnosis and Prevention• Diagnosis is identification of the virus.
• Prevention is with a vaccine.
Infectious Bronchitis
• Causes and Symptoms• Caused by a virus.
• Symptoms include tracheitis, sneezing, coughing, crackly breathing, and watery eyes.
Infectious Bronchitis
• Diagnosis and Prevention• Diagnosis by isolation of the virus.
• Prevention is immunization(vaccinate) with a live virus.
Cannibalism
• Non infectious disease that occurs in fowl raised in captivity.
• Includes vent picking, toe picking, and head picking.
• Vent Picking– is the severest form of cannibalism and is usually seen in
pullets in high production. It’s caused by a prolaps or tearing of tissue around the vent.
Toe and Head Picking
• Toe picking may be brought on by hunger and is seen in young chicks.
• Head picking usually follows injuries to the comb and wattles caused by freezing or fighting.
Fatty Liver Syndrome
• Excess fat surrounds the liver and body cavities.
• Usually affects caged birds but may affect floor birds of the heavier (meat) breeds.
• Prevention• TIP-Putting waterers and feeders on opposite sides of
the house to allow for exercise may reduce fatty liver syndrome.
• Also, not over feeding protein may help.
Pendulous Crop
• Found among chickens 2-3 months of age.
• Condition may be caused by irregular feeding and by over consumption of feed or water at one time.
• Always keep plenty of fresh, clean water in front of chickens.
Hysteria
• Excessive fright (usually only in young pullets or layers).
• If on the floor, they will pile into the corners and injure themselves. Death in large numbers often results.
• Keeping a light on the birds at all times and not scaring the birds may provide some prevention.