tailieunhanh - EXTERNAL SYMPTOMS FOR DIAGNOSING POULTRY DISEASES

Ducks occupy an important position next to chicken farming in India. They form about 10% of the total poultry population and contribute about 6-7% of total eggs produced in the country. Ducks are mostly concentrated in the Eastern and Southern States of the country mainly coastal region with non-descriptive indigenous stocks, which however are poor layers. Central Duck Breeding Farm under Ministry of Agriculture, Government of India was established in the year 1981 during the 5th Five Year plan with technical collaboration of Government of United Kingdom. | page 1 EXTERNAL SYMPTOMS FOR DIAGNOSING POULTRY DISEASES BODY Symptom Possible Cause Emaciation. Off-feed nutritional deficiencies lymphoid leukosis enteritis gizzard impaction tuberculosis unknown Stunted uneven growth. Gizzard impaction bluecomb disease alfatoxin poisoning synovitis contaminated hatching egg Swellings. Twitching muscular spasm. Ruptured air sac edema Botulism infectious bursal disease Trembling. Epidemic tremors encephalitis brain damage Paralysis. Botulism Marek s disease arthritis aflatoxin poisoning epidemic tremor Dehydration. Acute lack of water coccidiosis infectious bursal disease nutritional imbalance-dietary salts Nervousness. Hysteria drug intoxication Newcastle fungus infection Lying on breast legs Algae poisoning acute lack of water yellow jasmine paralyzed. poisoning botulism drug toxicity FEATHERS Symptom Possible Cause Moist under wing. Infectious coryza Loss of. Molting Deposits at base of shafts. Lice or mite eggs Soiled hackle feathers. Infectious coryza eye infection Feathers picked. Lice nutritional deficiency-methionine birds not debeaked Depigmented. Nutritional deficiencies-lysine iron or folic acid Broken on upper thigh. Self picking Feather eating. Nutritional deficiency-methionine page 2 Symptom Pigmentation excessive . Nodules mainly legs. Nodules over vent. Moist necrotic edematous. Darkened purplish. Crusted areas. Scabby hip. Gangrenous green. Vent irritated. Pale. Symptom Swollen puffy. Symptom Mottled red and white margins. Eruptions nodules. White scaly powdery. Symptom Watery. Blindness. Watery red inflamed closed. Cataracts. Crusts on eye lids. Pupil irregular blindness. Blood in eye. Large swollen. Skin Possible Cause Poor production high pigment intake Marek s disease Flukes rare Necrotic dermatitis exudative diathesis Erysipelas fowl cholera Erysipelas scab gangrenous dermatitis Self picking inflicted by other birds Hemmorhage arthritis gangrenous dermatitis Northern fowl mite lice occasionally Anemia .

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