An outbreak of blindness due to retinopathy in nine flocks of guinea fowl
| Autor: | Elena Catelli, E. Raffini, M. Frasnelli, L. Poppi, P. G. Bolognesi, H. L. Shivaprasad, F. Marzadori, Mattia Cecchinato, Caterina Lupini |
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| Přispěvatelé: | Cecchinato, M., Lupini, C, Bolognesi, P.G., Marzadori, F., Raffini, E., Frasnelli, M., Poppi, L., Shivaprasad, H.L., Catelli, E. |
| Rok vydání: | 2014 |
| Předmět: |
Veterinary medicine
Animal feed Immunology and Microbiology (all) animal diseases Biology Blindness Diagnosis Differential Food Animals medicine Animals Galliformes Retinopathy Poultry Diseases Guinea fowl General Immunology and Microbiology Animal Incidence (epidemiology) Incidence Outbreak food and beverages toxicity guinea fowl biology.organism_classification medicine.disease Animal Feed Blindne Poultry Disease Central Serous Chorioretinopathy Italy Animal Science and Zoology Flock blindness Galliforme Food Animal |
| Zdroj: | Avian diseases. 58(2) |
| ISSN: | 0005-2086 |
| Popis: | SUMMARY Blindness was observed in 10- to 14-day-old guinea fowl. The incidence ranged from 25% to 80% in nine flocks within a total population of 110,000 guinea fowls. Clinical signs of blindness in birds included aimless wandering, failure to find feed and water, lateral recumbency, loss of weight, and increased mortality. The birds lacked papillary reflexes to light, and there were no gross lesions in the eyes. Histologically there was degeneration and disorganization of photoreceptors in the retina. The guinea fowl came from three different breeder sources but all of the birds were given the same feed. The condition was not observed in the subsequent flocks that came from the same breeder sources but that were given different feed. Based on these observations, toxicity of an unknown ingredient in the feed is suspected as the cause of blindness in the guinea fowl. |
| Databáze: | OpenAIRE |
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