Range Production and Bird Health F. Dustan Clark, D.V.M., Ph.D. Extension Poultry Health Veterinarian Poultry Health Status Determination Disease any departure from the normal state of health Normal Many Diseases Produce Similar Signs What To Look For Observations Facilities Records
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F. Dustan Clark, D.V.M., Ph.D.
Extension Poultry Health Veterinarian
Mauled but not eaten
Killed by small bites-neatly piled,some heads gone
c. Heads/crops eaten.
1-2 birds killed
mauled, abdomen eaten
Deep marks on head and neck, some meat eaten
1 bird gone feathers left
Chicks killed, abdomen eaten, lingering smell
Several gone-no clues
HumanClues To Identifying Predators
From: J. Berry. Predators: Thieves in the night. OSU/CES Bull #8204
Swollen face, wattles, sinuses
Pneumonia, Sudden death, swollen joints, torticollis
Coughing, swollen face and sinuses. Bubbles in eye, sticky eye discharge
Swollen joints and/or footpad
Sticky eyelids, odor, rales, nasal discharge
Limberneck, flaccid paralysis
Blue.black skin lesions, high mortality
Avian Influenza (AI)
Low Path AI
High Path AI
Blisters, scabs,skin growths.
Difficult breathing and swallowing, growth in mouth, death
Cough, blood on feathers, mouth, beak, Difficult breathing, death
Egg drop, cough, sneeze, poor egg quality
Egg drop, soft shell eggs, chirping, cough
(high mortality, diarrhea, CNS, depression, nasal discharge)
Paralysis of legs, wings, neck, birds less than 6 months
High mortality, hemorrhages, similar to Exotic Newcastle
Weight loss, huddling, blood in feces, mortality in young. Unthrifty.
Weight loss, unthrifty, yellow diarrhea
Gasping, open mouth
Weight loss, See in feces
Weight loss, unthrifty, ruffled
Diarrhea, Unthrifty, thickened crop.
Feather damage, skin damage, feather picking, irritation
Feather and skin damage, feathers look oily, anemia, feather loss.
Northern stays on bird
Feather loss, picking, anemia, restless at night, skin damage. Red gets on bird at night
Thick dry white or yellow crusts on leg scales.
Northern Fowl Mite
Greek: Bios - “Life”
Security - Protection
1. Farm Facilities (Location, Structures, Layout)
2. Farm Operational Procedures
Greatest impact on Biosecurity
Easy and Quick to change
May carry disease organisms
May be necessary
May bring equipment
Restrict Access to animals
Keep facilities & gates locked
Have visitors sign a log
Change clothes, use coveralls, boot covers
Wash hands and disinfect
48 hr min. quarantine (Internationals)Visitor or Traffic Control
3 parts to 2 parts water
Avoid contamination of environment and animals