ملخص ألهم أمراض الدواجنضمن فعاليات اليوم التدريبي لألطباء البيطريين

بالقاهرة بدار الحكمة 2015أكتوبر 24السبت

ســيف عـفيـفي محـمد / دكتـور معهد بحوث صحة الحيوان

المعمل المرجعي للرقابة على االنتاج الداجني (جمصة ) مدير معمل الدقهلية

Trainer:

• Participants:

• Day Goals:

• Subjects to talk about:

( Diseases, Farm Biosecurity, Vaccination, Diagnosis )

Dr. Mohamed Saif, PhD

AHRI- NLQP , Gamasa lab. Director & Tech. Manager mohamed_saif85@hotmail.com Nlqp_gamasa@yahoo.com 01063632662

Poultry Diseases

Avian Influenza

• Orthomyxovirus- A

أنفلونزا الطيور أعراض واألرجلت ايزرقان العرف و الدال - (النفوق)الموت المفاجئ - عدم القدرة على الحركة -اعراض عصبية - تورم الرأس والجفون والعرف و والداليات -

نقط نزفية على الدهون القلب التهاب دموى فى القصبة الهوائية نقط نزفية على الدهون

نقط نزفية على غشاء االمعاء خطوط نزفية على المعدة نقط نزفية على الدهون القلب

أنزفة على المبيض نقط نزفية على البنكرياس نقط نزفية على العضالت

نفلونزا الطيورأل الصفة التشريحية

• Diagnosis

• Prevention

• Control

https://www.youtube.com/watch?v=B5aPHnNAVCA

انفلوانزا الطيور د محمد سيف بقناة مصر الزراعية 9 ديسمبر

2014

Newcastle disease

• Notifiable disease !

• Avian paramyxovirus (serotype 1, 8 genotypes)

• different pathogenity (v, m, l, a)

• chicken, pheasant, turkey, pigeon, wild birds (water fowl)

• Sensitivity: 56 °C - 3 min pH 3 - 3 min disinfectant

Examples Of ICPI Of Several NDV Isolates

Virus Product ICPI

Ulster 2C Poulvac NDW 0.04 to 0.23

PHY.LMV.42 Cevac® VITAPEST L 0.16

Hitchner B1 Many 0.18

Clone 30 Nobilis® ND Clone 30 0.25

VG/GA AVINEW® 0.30

La Sota Many 0.4

Komarov 1.41

• Clinical signs: respiratory disease enteritidis nervous signs marked drop in egg production

• Pathology: – haemorrhages on seromembranes,

on mucosal membranes (proventriculi, small intestine, ceca, -lymphoid tonsils -, trachea, pharynx)

– enteritidis

– diphtheriod inflammation on lymphoid tonsils on pharynx

• Isolation of virus (pathogenicity)

• Prevention / Vaccination

• Differential diagnosis (septicaemia, CRD, IBD, ILT, IB, Fowl pox, pneumovirus, coccidiosis, mycotoxicosis)

Fowl pox

• Poxviridae, Avipox

• Sensitivity: 50°C heating 30 min 60°C 8 min in dry scabs for months/years pH 5-9 resistant

• cutaneous form nodular (proliferative) lesions on the comb, wattle, eyelids, other non feathered areas

• diphtheroid form nodules on mucosal membranes of pharynx, trachea, oesophagus

• special histopathological changes (cytoplasmic inclusion body)

Infectious Laryngotracheitis

• Herpesvirus

• Sensitivity: mild (halogen-detergents + iodophors, heating, but (-18° C-25° C !)

• Acute respiratory disease

• Conjunctivitis Laryngitis Tracheitis (Histopathology: intranuclear inclusion body in epithelial cells by 3 day PI)

Infectious bronchitis

• Coronavirus

• Sensitivity: 56°C 15 min at room temperature 2-3 days common detergents destroy

• Pathology: acute catarrhal tracheitis, bronchitis sinusitis, air sacculitis local pneumonia

• nephritis, salpingitis (eggs !)

Infectious bursal Disease (Gumboro Disease)

• Birnavirus

• Bursa Fabricius (B lymphoid cells) immunosuppression !

• Sensitivity: very stable virus! 60-70°C -30 min 0.5 % chloramines 10 min invert soap + 0,05 sodium hydroxide

• Pathology: haemorrhages in muscles (legs, breast) on mucosal membrane of proventriculi on lymphoid tonsils of intestine oedema and haemorrhageous inflammation of bursa Fabricii

• Diff. diagnosis: Newcastle disease mycotoxicosis

• Prevention: vaccination, hygiene

Marek’s Disease

• Herpesvirus (cell associated virus)

• Sensitivity:

• Pathogenity: „classical” form (lesions in peripheral nerves) tumoral form (lymphoid tumors in different organs or in skin) transient paralysis

• Differential diagnosis: Newcastle disease leucosis tumors

Parasites / Protozoa Coccidiosis

• Eimeria tenella Eimeria necatrix Eimeria acervulina Eimeria truncata

• Chicken, turkey geese

• Anticoccidial drugs /vaccination

• immunsuppressive diseases (Marek’s disease, CAV, Gumboro disease, Reo, mycotoxines…)

• Haemorrhagic enteritis (clotted blood - fibrinous inflammation) in caecum in small intestines

• renal coccidiosis (enlarged, yellow-greyish kidneys)

Fungal infections

Aspergillosis

• Aspergillus fumigatus Aspergillus flavus Penicillium Mucor

• Respiratory disease pneumonia (granulomes) air sacculitis, peritonitis

• Litter, feed (toxins)

• (Antibiotics contraindicated!)

In these cases poultry meat is partial condemned for human consumption

(the effected areas are condemned:

- parenchymal orgams

- intestines

- skin + muscles /breast, legs/ )

Bacterial Diseases • Salmonellosis

• Colibacillosis

• Infectious Coryza

• Fowl Cholera

+ Mycoplasma and CRD, CCRD