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 page 1 EXTERNAL SYMPTOMS FOR DIAGNOSING POULTRY DISEASES
Symptom Emaciation... Stunted, uneven growth. Swellings... Twitching, muscular spasm... Trembling... Paralysis... Dehydration... Nervousness... Lying on breast, legs paralyzed...
BODY Possible Cause Off-feed; nutritional deficiencies; lymphoid leukosis; enteritis; gizzard impaction; tuberculosis; unknown Gizzard impaction; bluecomb disease; alfatoxin poisoning; synovitis; contaminated hatching egg Ruptured air sac; edema Botulism; infectious bursal disease Epidemic tremors; encephalitis (brain damage) Botulism; Marek's disease; arthritis; aflatoxin poisoning; epidemic tremor Acute lack of water; coccidiosis; infectious bursal disease; nutritional imbalance-dietary salts Hysteria; drug intoxication; Newcastle; fungus infection Algae poisoning; acute lack of water; yellow jasmine poisoning; botulism; drug toxicity
Symptom Moist under wing... Loss of... Deposits at base of shafts. Soiled hackle feathers... Feathers picked... Depigmented... Broken on upper thigh... Feather eating...
FEATHERS Possible Cause Infectious coryza Molting Lice or mite eggs Infectious coryza, eye infection Lice; nutritional deficiency-methionine; birds not debeaked Nutritional deficiencies-lysine, iron or folic acid Self picking Nutritional deficiency-methionine
Symptom Pigmentation excessive... Nodules, mainly legs... Nodules over vent... Moist, necrotic, edematous. Darkened, purplish... Crusted areas... Scabby hip... Gangrenous, green... Vent irritated... Pale...
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; nutritional deficiencies-iron, copper, or vitamin B12
Symptom Swollen, puffy...
Head Possible Cause Ruptured air sac; infectious coryza; injury; Newcastle disease
Symptom Mottled, red and white margins... Eruptions, nodules... White, scaly, powdery...
Frozen Fowl pox Favus
Possible Cause
Symptom Watery... Blindness... Watery, red, inflamed, closed... Cataracts... Crusts on eye lids... Pupil irregular, blindness. Blood in eye... Large, swollen...
Eyes Possible Cause Infectious coryza Fowl pox; aspergillosis; Arizona paracolon; paratyphoid Laryngotracheitis; ammonia burn; Newcastle disease; nutritional deficiency-vitamin A Epidemic tremor Nutritional deficiency-vitamin A; fowl pox Marek's disease Hemorrhagic anemia Mycoplasma infection
page 3 Face
Swollen. Darkened, purplish. Nodules...
Infectious coryza; Newcastle disease; nutritional deficiency-vitamin A; E. coli Erysipelas; fowl cholera; septicemia; injury Fowl pox
Discharge.
Infectious coryza; chronic respiratory disease; infectious bronchitis; influenza
Symptom Pustules... Crusts at margins... Beak soft, rubbery..
Mouth Possible Cause Nutritional deficiency-vitamin A Nutritional deficiencies-pantothenic acid or biotin Nutritional deficiencies-vitamin D or calcium-phosphorus imbalances
White coat over tongue and „T M c cc , ° Wet form or fowl in mouth... Mycotoxins; chemical injury
Symptom Swollen, bulbous... Nodules...
Wattles Possible Cause Infectious coryza; fowl cholera Fowl pox
Symptom Paralysis (limber neck)., Twisting... Retracted over back... Retracted under breast. Scabby necrotic areas...
Neck Possible Cause Botulism; yellow jasmine poisoning Newcastle disease; fowl cholera; brain infection; improper injection of Marek's vaccine Newcastle disease; nutritional deficiency-thiamin Nutritional deficency-vitamin E; Newcastle disease Improper injection of drugs; other injury
Symptom Paralysis... Rough, scaly... Bowed, weak... Bone bends... Joint swelling... Tendon at hock displaced. Stilted gait... Shank depigmented... Toes twisted...
Possible Cause Marek's disease; botulism; heat stoke; epidemic tremor; cage layer fatigue; vitamin E deficiency; algae poisoning; yellow jasmine poisoning; acute lack of water Fowl pox; scaly leg mite Nutritional deficiency-vitamin D; osteodystrophy Nutritional deficiency-vitamin D Infectious synovitis; paratyphoid; pullorum; zinc deficiency; staphylococcosis; tenosynovitis; arthritis Perosis (nutritional deficiency-manganese or choline) Tenosynovitis Nutritional deficiency-vitamin A; coccidiosis; any low grade slow disease (for any length of time) Genetic
Symptom Joints fixed... Swollen foot pad... Toes curled... Foot pad cracked, dermatitis... Bird walks on toes... Toes twisted...
Feet Possible Cause Tenosynovitis Infectious synovitis; bumblefoot Nutritional deficiency-riboflavin; genetic; management deficiency Nutritional deficiency-biotin or pantothenic acid; management deficiency Tenosynovitis Genetic
Symptom Profuse... Bloody... Green... Sulfur yellow... Light yellow or yellowish-green... Foamy...
Droppings Possible Cause Enteritis; excess roughage in diet Cecal coccidiosis; Newcastle disease Feed intake low; bile not diluted Blackhead Fowl typhoid; fowl cholera Intestinal parasites (protozoa)
Symptom Sudden severe drop Unsatisfactory. Egg wrinkled, depigmented... Production pause., Poor shell quality.
Egg Production Possible Cause Newcastle disease: infectious bronchitis: laryngotracheitis; influenza-A, mycotoxin, mismanagement (no lights, feed, or water) Infectious coryza: fowl cholera: chronic respiratory diseases; diet deficiencies; gizzard impaction; fowl pox; hepatitis; lice; mites; ascarids; capillaria; lymphoid leukosis; coccidiosis; enteritis; pullorum; fowl typhoid; aflatoxicosis; adenovirus infection; toxins Necrotic enteritis; infectious bronchitis Epidemic tremor Newcastle disease; infectious bronchitis; adenovirus infection; diet deficiency; T-2 fusariotoxin
Symptom Instant, few or no prior signs... High mortality-producing diseases...
Possible Cause Aortic rupture; acute lack of water; fowl cholera; overheated, fatty liver hemorrhagic syndrome Fowl cholera; erysipelas; exotic Newcastle disease; acute coccidiosis; aflatoxin; botulism; poison; fatty liver hemorrhagic syndrome |
