Peer-reviewed veterinary case report
Progressive retinal atrophy causing blindness in dogs in Brazil
By Freitas, Henrique M et al.·Published in Open veterinary journal·2021·Veterinary Medicine Department, Brazil·View original on PubMed →
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Original publication title: Retrospective and prospective study of progressive retinal atrophy in dogs presented to the veterinary hospital of the Federal University of Parana, Brazil.
- Species:
- dog
Plain-English summary
A group of 130 dogs, including many Poodles and Cocker Spaniels, were diagnosed with progressive retinal atrophy (PRA), a condition that can lead to blindness. The study found that Pomeranians were particularly at risk for developing this eye problem. Symptoms of PRA include difficulty seeing, which can be assessed through various tests like tracking movement and light responses. While there is no cure for PRA, early detection can help owners manage their dog's condition and prepare for potential blindness.
People also search for: dog eye problems Pomeranian · progressive retinal atrophy symptoms in dogs · Cocker Spaniel vision loss
Abstract
BACKGROUND: Progressive retinal atrophy (PRA) is one of the main causes of blindness in dogs. Despite its clinical importance, there is limited epidemiological information available, particularly in South America. AIM: The main objective of this study was to perform a retrospective, and prospective analysis of PRA in dogs admitted at the Veterinary Hospital of the Federal University of Paraná, Brazil. METHODS: Medical records of dogs admitted between 2014 and 2018 were selected through the archives of the Comparative Ophthalmology Laboratory. A total of 130 dogs with medical records indicating clinical signs suggestive of PRA, independent of the electroretinography confirmation, were selected. In order to investigate common characteristics, each patient's clinical history, ophthalmic examination, and visual status were reviewed (obstacle course, pupillary light reflex, dazzle reflex, visual tracking to a cotton ball, and menace responses). Additionally, a prospective study was performed, where flash electroretinography was performed on 30 animals with clinical signs suggestive of PRA, and 14 animals were selected for fundus photography. Data were assessed through descriptive and inferential statistics. RESULTS: A total of 2,055 dogs were evaluated between January 2014 and December 2018. Of those, 130 animals were presumptively diagnosed with PRA (6.33%), consisting of 18 different breeds and 27 dogs with a mixed pedigree. Poodles were the most prevalent breed (= 26; 20.00%), followed by Cocker Spaniels (= 19; 14.62%). In the reported caseload, Pomeranians showed a considerably higher odds ratio for PRA development (15.36%). CONCLUSION: Pomeranians presented a high odds ratio, suggesting that further studies may be performed with breeds with a high potential for developing this disease.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/34722198/