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Cataracts in Labrador Retriever and Jack Russell Terrier From the United Kingdom: A Two-Year Retrospective Study.
Topics in Companion Animal Medicine 2018 December
Cataracts are among the most common ocular diseases, and are a leading cause of vision loss in humans and dogs. Jack Russell Terriers (JRT) and Labrador Retrievers (LR) are among the most popular canine breeds in the United Kingdom, and also among the most affected by cataracts. This study aimed to analyze the clinical features and the surgical outcome of cataracts in JRT and LR in an ophthalmologic reference Veterinary Hospital in the United Kingdom. For that purpose, medical records from JRT and LR diagnosed with cataracts between January 2015 and December 2016 were retrospectively evaluated. Data related to identification, clinical history, preoperative features, and surgical outcomes were analyzed. Forty-four dogs (81 eyes), including 26 JRT and 18 LR, were enrolled in the study. Mean ages were 10.2 ± 3.2 years in JRT and 8.5 ± 3.7 years in LR. Twenty-eight (63.6%) were females and 16 (36.4%) were males. Most dogs (84.1%) presented with bilateral cataracts. Nuclear and cortical cataracts were the most prevalent type in both breeds (JRT: n = 30, 61.2%; LR: n = 16, 50.0%), although subcapsular cataracts were also frequent in LR (n = 10, 31.3%). Significant differences in cataract location within the lens were detected between the two breeds (P = .002). Senile in JRT (n = 7) and genetic in LR (n = 7) were the most common etiologies. Concomitant ocular lesions were more frequent in dogs presented with cataracts in advanced stages, and included lens (n = 18; JRT: n = 15; LR: n = 3) and retinal alterations (n = 8; JRT: n = 2; LR: n = 6), and glaucoma (n = 6; JRT: n = 5; LR: n = 1). Thirty-three animals (75.0%, 51 eyes) were submitted to phacoemulsification with intraocular lens placement. Of these, 28 eyes (54.9%; JRT: n = 21; LR: n = 7) were visual, 19 eyes (37.3%; JRT: n = 11; LR: n = 8) presented impaired vision and four eyes (7.8%; JRT: n = 0; LR: n = 4) were blind at last clinical record. Postoperative complications were detected in 11 eyes (21.6%), and were more frequent in dogs presented with cataracts in advanced stages. These results and the multifactorial nature of cataracts call for further studies to identify and characterize the variables in a broader assessment, including other breeds and influencing factors.
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