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Diseases of Poultry II. vet-student.mihanblog.com.

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Presentation on theme: "Diseases of Poultry II. vet-student.mihanblog.com."— Presentation transcript:

1 Diseases of Poultry II. vet-student.mihanblog.com

2 ANTE MORTEM INSPECTION At the farm before transportation to the slaughterhouse the poultry flock must be examined by veterinarian. At the farm before transportation to the slaughterhouse the poultry flock must be examined by veterinarian. A certificate must be composed on the results of this inspection and the pre-life of the flock A certificate must be composed on the results of this inspection and the pre-life of the flock If the certificate is available – and it is negative – and it does not indicate the necessity of special measures, the ante mortem inspection at the slaughterhouse will include the identification of transported flock and control of injuries took place during transportation, furthermore the examination of dead birds. If the certificate is available – and it is negative – and it does not indicate the necessity of special measures, the ante mortem inspection at the slaughterhouse will include the identification of transported flock and control of injuries took place during transportation, furthermore the examination of dead birds. Based on these data and examinations the veterinarian decides whether the flock will be submitted to normal or special slaughter or further special examination. Based on these data and examinations the veterinarian decides whether the flock will be submitted to normal or special slaughter or further special examination. vet-student.mihanblog.com

3 HUNGARIAN ZOO SANITARY CODE 41/1997.(V. 28.) FM. r. Notifiable Diseases HUNGARIAN ZOO SANITARY CODE 41/1997.(V. 28.) FM. r. Notifiable Diseases O.I.E. list A O.I.E. list A – Newcastle disease (Paramyxovirus) – Avian influenza (Orthomyxovirus) – Duck plaque (Herpesvirus) vet-student.mihanblog.com

4 Viral Diseases Newcastle disease Newcastle disease Avian influenza Avian influenza Fowl pox Fowl pox Infectious bronchitis Infectious bronchitis Infectious laryngotracheitis Infectious laryngotracheitis Infectious bursitis Infectious bursitis Marek's disease Marek's disease vet-student.mihanblog.com

5 Newcastle disease Notifiable disease ! Notifiable disease ! Avian paramyxovirus (serotype 1, 8 genotypes) Avian paramyxovirus (serotype 1, 8 genotypes) different pathogenity (v, m, l, a) different pathogenity (v, m, l, a) chicken, pheasant, turkey, pigeon, wild birds (water fowl) chicken, pheasant, turkey, pigeon, wild birds (water fowl) Sensitivity: 56 °C - 3 min pH min disinfectant Sensitivity: 56 °C - 3 min pH min disinfectant vet-student.mihanblog.com

6 Clinical signs: respiratory disease enteritidis nervous signs marked drop in egg production Clinical signs: respiratory disease enteritidis nervous signs marked drop in egg production Pathology: Pathology: –haemorrhages on seromembranes, on mucosal membranes (proventriculi, small intestine, ceca, -lymphoid tonsils -, trachea, pharynx) –enteritidis –diphtheriod inflammation on lymphoid tonsils on pharynx vet-student.mihanblog.com

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9 Isolation of virus (pathogenicity) Isolation of virus (pathogenicity) Prevention / Vaccination Prevention / Vaccination Differential diagnosis (septicaemia, CRD, IBD, ILT, IB, Fowl pox, pneumovirus, coccidiosis, mycotoxicosis) Differential diagnosis (septicaemia, CRD, IBD, ILT, IB, Fowl pox, pneumovirus, coccidiosis, mycotoxicosis) vet-student.mihanblog.com

10 if NDV is observed on the farm: In compliance with EU directive 93/119/EC, depopulation of infected flocks may take place using the following methods/drugs/systems: Electronarcosis by water dipping Electronarcosis by water dipping Decapitation and dislocation of the neck Decapitation and dislocation of the neck Gassing with carbon dioxide Gassing with carbon dioxide Vacuum tank Vacuum tank if NDV is observed in the slaughter-house everything is condemned, and everything has to be desinfected vet-student.mihanblog.com

11 Fowl pox Poxviridae, Avipox Poxviridae, Avipox Sensitivity: 50°C heating 30 min 60°C 8 min in dry scabs for months/years pH 5-9 resistant Sensitivity: 50°C heating 30 min 60°C 8 min in dry scabs for months/years pH 5-9 resistant vet-student.mihanblog.com

12 cutaneous form nodular (proliferative) lesions on the comb, wattle, eyelids, other non feathered areas cutaneous form nodular (proliferative) lesions on the comb, wattle, eyelids, other non feathered areas diphtheroid form nodules on mucosal membranes of pharynx, trachea, oesophagus diphtheroid form nodules on mucosal membranes of pharynx, trachea, oesophagus special histopathological changes (cytoplasmic inclusion body) special histopathological changes (cytoplasmic inclusion body) vet-student.mihanblog.com

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15 Infectious Laryngotracheitis Herpesvirus Herpesvirus Sensitivity: mild (halogen-detergents + iodophors, heating, but (-18° C-25° C !) Sensitivity: mild (halogen-detergents + iodophors, heating, but (-18° C-25° C !) Acute respiratory disease Acute respiratory disease Conjunctivitis Laryngitis Tracheitis (Histopathology: intranuclear inclusion body in epithelial cells by 3 day PI) Conjunctivitis Laryngitis Tracheitis (Histopathology: intranuclear inclusion body in epithelial cells by 3 day PI) vet-student.mihanblog.com

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18 Infectious bronchitis Coronavirus Coronavirus Sensitivity: 56°C 15 min at room temperature 2-3 days common detergents destroy Sensitivity: 56°C 15 min at room temperature 2-3 days common detergents destroy Pathology: acute catarrhal tracheitis, bronchitis sinusitis, air sacculitis local pneumonia Pathology: acute catarrhal tracheitis, bronchitis sinusitis, air sacculitis local pneumonia nephritis, salpingitis (eggs !) nephritis, salpingitis (eggs !) vet-student.mihanblog.com

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21 Infectious bursal Disease (Gumboro Disease) Birnavirus Birnavirus bursa Fabricii (B lymphoid cells) immunsuppression ! bursa Fabricii (B lymphoid cells) immunsuppression ! Sensitivity: very stabil virus! 60-70°C -30 min 0.5 % chloramines 10 min invert soap + 0,05 sodium hydroxide Sensitivity: very stabil virus! 60-70°C -30 min 0.5 % chloramines 10 min invert soap + 0,05 sodium hydroxide vet-student.mihanblog.com

22 Pathology: haemorrhages in muscles (legs, breast) on mucosal membrane of proventriculi on lymphoid tonsils of intestine oedema and haemorrhageous inflammation of bursa Fabricii 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 Diff. diagnosis: Newcastle disease mycotoxicosis Prevention: vaccination, hygiene Prevention: vaccination, hygiene vet-student.mihanblog.com

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24 Marek’s Disease Herpesvirus (cell associated virus) Herpesvirus (cell associated virus) Sensitivity:  Sensitivity:  Pathogenity: „classical” form (lesions in peripheral nerves) tumoral form (lymphoid tumors in different organs or in skin) transient paralysis 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 Differential diagnosis: Newcastle disease leucosis tumors vet-student.mihanblog.com

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29 Parasites / Protozoa Coccidiosis Eimeria tenella Eimeria necatrix Eimeria acervulina Eimeria truncata Eimeria tenella Eimeria necatrix Eimeria acervulina Eimeria truncata Chicken, turkey geese Chicken, turkey geese Anticoccidial drugs /vaccination Anticoccidial drugs /vaccination immunsuppressive diseases (Marek’s disease, CAV, Gumboro disease, Reo, mycotoxines…) immunsuppressive diseases (Marek’s disease, CAV, Gumboro disease, Reo, mycotoxines…) vet-student.mihanblog.com

30 Haemorrhagic enteritidis (clotted blood - fibrinous inflammation) in caecum in small intestines Haemorrhagic enteritidis (clotted blood - fibrinous inflammation) in caecum in small intestines renal coccidiosis (enlarged, yellow-greyish kidneys) renal coccidiosis (enlarged, yellow-greyish kidneys) vet-student.mihanblog.com

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32 Fungal infections Aspergillosis Aspergillus fumigatus Aspergillus flavus Penicillium Mucor Aspergillus fumigatus Aspergillus flavus Penicillium Mucor Respiratory disease pneumonia (granulomes) air sacculitis, peritonitis Respiratory disease pneumonia (granulomes) air sacculitis, peritonitis Litter, feed (toxins) Litter, feed (toxins) (Antibiotics contraindicated!) (Antibiotics contraindicated!) vet-student.mihanblog.com

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34 In these cases poultry meat is partial condemned for human consumption (the effected areas are condemned: - parenchymal orgams - intestines - skin + muscles /breast, legs/ ) vet-student.mihanblog.com


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