E-ISSN 2218-6050 | ISSN 2226-4485
 

Original Article


Retrospective and prospective study of progressive retinal atrophy in dogs presented to the veterinary hospital of the Federal University of Parana, Brazil

Henrique Moura Freitas, Andr T Somma, Bret A. Moore, Fabiano Montiani-Ferreira.

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 (UFPR), Brazil.
Methods: Medical records of dogs admitted between 2014 and 2018 were selected through the archives of the Comparative Ophthalmology Laboratory (LABOCO). A total of 130 dogs with medical records indicating clinical signs suggestive of PRA, independent of the confirmation by the electroretinography (ERG), 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 (FERG) was performed on 30 animals with clinical signs suggestive of PRA, and 14 animals were selected for fundus photography. Data was assessed through descriptive and inferential statistics.
Results: A total of 2055 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 (n=26; 20.00%), followed by Cocker Spaniels (n=19; 14.62%). In the reported caseload, Pomeranians showed considerably higher odds ratio for the development of PRA (15.36).
Conclusion: Pomeranians presented a high odds ratio, suggesting that further studies may be performed with breeds that have a high potential of developing this disease.

Key words: PRA. ERG. Retinal dystrophies. Dogs


 
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How to Cite this Article
Pubmed Style

Freitas HM, Somma AT, Moore BA, Montiani-Ferreira F. Retrospective and prospective study of progressive retinal atrophy in dogs presented to the veterinary hospital of the Federal University of Parana, Brazil. Open Vet J. 2021; 11(3): 370-378. doi:10.5455/OVJ.2021.v11.i3.6


Web Style

Freitas HM, Somma AT, Moore BA, Montiani-Ferreira F. Retrospective and prospective study of progressive retinal atrophy in dogs presented to the veterinary hospital of the Federal University of Parana, Brazil. https://www.openveterinaryjournal.com/?mno=44279 [Access: February 06, 2023]. doi:10.5455/OVJ.2021.v11.i3.6


AMA (American Medical Association) Style

Freitas HM, Somma AT, Moore BA, Montiani-Ferreira F. Retrospective and prospective study of progressive retinal atrophy in dogs presented to the veterinary hospital of the Federal University of Parana, Brazil. Open Vet J. 2021; 11(3): 370-378. doi:10.5455/OVJ.2021.v11.i3.6



Vancouver/ICMJE Style

Freitas HM, Somma AT, Moore BA, Montiani-Ferreira F. Retrospective and prospective study of progressive retinal atrophy in dogs presented to the veterinary hospital of the Federal University of Parana, Brazil. Open Vet J. (2021), [cited February 06, 2023]; 11(3): 370-378. doi:10.5455/OVJ.2021.v11.i3.6



Harvard Style

Freitas, H. M., Somma, . A. T., Moore, . B. A. & Montiani-Ferreira, . F. (2021) Retrospective and prospective study of progressive retinal atrophy in dogs presented to the veterinary hospital of the Federal University of Parana, Brazil. Open Vet J, 11 (3), 370-378. doi:10.5455/OVJ.2021.v11.i3.6



Turabian Style

Freitas, Henrique Moura, Andr T Somma, Bret A. Moore, and Fabiano Montiani-Ferreira. 2021. Retrospective and prospective study of progressive retinal atrophy in dogs presented to the veterinary hospital of the Federal University of Parana, Brazil. Open Veterinary Journal, 11 (3), 370-378. doi:10.5455/OVJ.2021.v11.i3.6



Chicago Style

Freitas, Henrique Moura, Andr T Somma, Bret A. Moore, and Fabiano Montiani-Ferreira. "Retrospective and prospective study of progressive retinal atrophy in dogs presented to the veterinary hospital of the Federal University of Parana, Brazil." Open Veterinary Journal 11 (2021), 370-378. doi:10.5455/OVJ.2021.v11.i3.6



MLA (The Modern Language Association) Style

Freitas, Henrique Moura, Andr T Somma, Bret A. Moore, and Fabiano Montiani-Ferreira. "Retrospective and prospective study of progressive retinal atrophy in dogs presented to the veterinary hospital of the Federal University of Parana, Brazil." Open Veterinary Journal 11.3 (2021), 370-378. Print. doi:10.5455/OVJ.2021.v11.i3.6



APA (American Psychological Association) Style

Freitas, H. M., Somma, . A. T., Moore, . B. A. & Montiani-Ferreira, . F. (2021) Retrospective and prospective study of progressive retinal atrophy in dogs presented to the veterinary hospital of the Federal University of Parana, Brazil. Open Veterinary Journal, 11 (3), 370-378. doi:10.5455/OVJ.2021.v11.i3.6