EXTERNAL SYMPTOMS FORDIAGNOSING POULTRY DISEASES.docx
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Transcript of EXTERNAL SYMPTOMS FORDIAGNOSING POULTRY DISEASES.docx
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EXTERNAL SYMPTOMS
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FORDIAGNOSING POULTR
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Y DISEASESBODY Symptom
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Possible CauseEmaciation... Off-feed; nutritional deficiencies;lymphoid leukosis;enteritis; gizzard impaction; tuberculosis; unknown
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Stunted, uneven growth.... Gizzard impaction; bluecomb disease;alfatoxin poisoning;synovitis;contaminated hatching egg Swellings...
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Ruptured air sac; edemaTwitching, muscular spasm... Botulism;infectious bursal disease Trembling...
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Epidemic tremors; encephalitis (brain damage)
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Paralysis...Botulism;Marek's disease; arthritis;aflatoxin poisoning; epidemic tremorDehydration... Acute lack of water
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;coccidiosis;infectious bursal disease; nutritional imbalance-dietary salts Nervousness... Hysteria; drug intoxication
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;Newcastle; fungus infectionLying on breast, legs paralyzed...Algae poisoning; acute lack of water; yellow jasmine poisoning;botulism; drug toxicity
FEATHERS
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Symptom Possible CauseMoist under wing...Infectious coryza
Loss of...MoltingDeposits at base of shafts... Liceormiteeggs
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Soiled hackle feathers...Infectious coryza, eye infectionFeathers picked...Lice; nutritional deficiency-methionine; birds not debeakedDepigmented...
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Nutritional deficiencies-lysine, iron or folic acid Broken on upper thigh...Self pickingFeather eating...
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Nutritional deficiency-methionine
SkinSymptom Possible CausePigmentation excessive ...
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Poor production; high pigment intakeNodules, mainly legs...Marek's diseaseNodules over vent...Flukes (rare)Moist, necrotic, edematous...
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Necrotic dermatitis, exudative diathesisDarkened, purplish...Erysipelas;fowl choleraCrusted areas...Erysipelas; scab; gangrenous dermatitisScabby hip...
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Self picking, inflicted by other birdsGangrenous, green...Hemmorhage; arthritis; gangrenous dermatitis Vent irritated...
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Northern fowl mite;lice(occasionally) Pale...Anemia; nutritional deficiencies-iron, copper, or vitamin B12
Head
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Symptom Possible CauseSwollen, puffy... Ruptured air sac;infectious coryza; injury;Newcastle disease
CombSymptom
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Possible CauseMottled, red and white margins...FrozenEruptions, nodules...Fowl pox
White, scaly, powdery...Favus
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EyesSymptom Possible CauseWatery...Infectious coryza
Blindness...Fowl pox;aspergillosis;
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Arizona paracolon; paratyphoid
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Watery, red, inflamed, closed...Laryngotracheitis; ammonia burn;Newcastle
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disease; nutritionaldeficiency-vitamin A Cataracts...Epidemic tremorCrusts on eye lids...Nutritional deficiency-vitamin A;fowl pox
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Pupil irregular, blindness...Marek's diseaseBlood in eye...Hemorrhagic anemiaLarge, swollen...Mycoplasma infection
FaceSymptom
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Possible CauseSwollen...Infectious coryza;Newcastle disease; nutritional deficiency-vitamin A;E. coli Darkened, purplish...
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Erysipelas;fowl cholera; septicemia; injury Nodules...Fowl pox
NostrilsSymptom Possible CauseDischarge...
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Infectious coryza; chronic respiratory disease;infectious bronchitis; influenza MouthSymptom Possible CausePustules...
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Nutritional deficiency-vitamin ACrusts at margins...Nutritional deficiencies-pantothenic acid or biotinBeak soft, rubbery...Nutritional deficiencies-vitamin
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D or calcium-phosphorusimbalances White coat over tongue and inmouth... Wet form of fowl pox
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Ulcers...Mycotoxins; chemical injury
WattlesSymptom Possible CauseSwollen, bulbous...
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Infectious coryza;fowl choleraNodules...Fowl pox
Neck Symptom Possible CauseParalysis (limber neck)...
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Botulism; yellow jasmine poisoningTwisting...Newcastle disease;fowl cholera; brain infection; improper injection of Marek's vaccine Retracted over back...
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Newcastle disease; nutritional deficiency-thiamin Retracted under breast... Nutritional deficency-vitamin E;Newcastle disease
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Scabby necrotic areas...Improper injection of drugs; other injury
LegsSymptom Possible CauseParalysis...
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Marek's disease;botulism; heat stoke; epidemic tremor; cage layer fatigue; vitamin E deficiency; algae poisoning; yellow jasminepoisoning; acute lack of water
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Rough, scaly... Fowl pox;scaly leg miteBowed, weak... Nutritional deficiency-vitamin D; osteodystrophy
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Bone bends... Nutritional deficiency-vitamin DJoint swelling... Infectious synovitis; paratyphoid;pullorum; zinc deficiency;staphyloc
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occosis; tenosynovitis; arthritis Tendon at hock displaced... Perosis (nutritional deficiency-
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manganese or choline) Stilted gait... TenosynovitisShank depigmented... Nutritional deficiency-vitamin
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A;coccidiosis; any low grade slowdisease (for any length of time) Toes twisted... Genetic
Feet Symptom
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Possible CauseJoints fixed...TenosynovitisSwollen foot pad...Infectious synovitis; bumblefootToes curled...Nutritional deficiency-riboflavin;
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genetic; management deficiencyFoot pad cracked, dermatitis...Nutritional deficiency-biotin or pantothenic acid; managementdeficiency
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Bird walks on toes...TenosynovitisToes twisted...Genetic
DroppingsSymptom Possible CauseProfuse...
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Enteritis; excess roughage in dietBloody... Cecal coccidiosis;Newcastle diseaseGreen...Feed intake low; bile not dilutedSulfur yellow...
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Blackhead
Light yellow or yellowish-green...Fowl typhoid;fowl choleraFoamy...Intestinal parasites (protozoa)
Egg ProductionSymptom
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Possible CauseSudden severe drop ...Newcastle disease;infectious bronchitis; laryngotracheitis; influenza-A,mycotoxin,
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mismanagement (no lights, feed, or water)Unsatisfactory...Infectious coryza;fowl cholera; chronic respiratory diseases; diet deficiencies; gizzard impaction;fowl pox; hepatitis;lice;mites;
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ascarids;capillaria;lymphoid leukosis;coccidiosis;enteritis; pullorum; fowl typhoid;aflatoxicosis; adenovirus infection; toxins
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Egg wrinkled, depigmented...Necrotic enteritis;infectious bronchitisProduction pause...Epidemic tremorPoor shell quality...Newcastle disease;infectious
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bronchitis; adenovirus infection; diet deficiency;T-2 fusariotoxin DeathSymptom Possible Cause
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Instant, few or no priorsigns...Aortic rupture; acute lack of water;fowl cholera; overheated,fatty liver hemorrhagic syndrome
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High mortality-producingdiseases...Fowl cholera;erysipelas;exotic Newcastle disease;acute coccidiosis;aflatoxin;botulism; poison;fatty liver
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hemorrhagic syndrome
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INTERNAL SYMPTOMS
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FORDIAGNOSING POULTR
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Y DISEASESSubcutaneous TissueSymptom
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Possible CauseSmall (no.6 shot size) nodules... Subcutaneous mite (rare)
Excess Fluid...
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Salt poisoning; edema; exudative diathesis; anemia Air under skin... Ruptured air sac; injury or infection of skin
Muscle
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Symptom Possible CauseCongested (as though cooked)...Septicemic disease; improperly bledHemorrhages...
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Hemorrhagic anemia;erysipelas, crotolaria;mycotoxicosis; other poisoning; inclusion body hepatitis;infectious bursal disease; injuryDehydrated...
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Acute lack of water;coccidiosisTumors... Marek's disease
LegsSymptom Possible CauseBone bends...
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Nutritional deficiency-vitamin DBone thickened, enlarged... Lymphoid leukosis(osteopetrosis); tenosynovitis;
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nutritionaldeficiency-zinc