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  • Cataracts in Labrador Retriever and Jack Russell Terrier: a two-year retrospective study
    Publication . dos Santos, Rafael Guerra Campos Marques; Duarte, Sofia Alexandra Giestas Cancela; Vilhena, Hugo Corte-Real
    Cataracts are among the most common ocular diseases and are a leading cause of vision loss in dogs and humans. Jack Russell Terriers (JRT) and Labrador Retrievers (LR) are among the canine breeds most affected by cataracts. This study aimed to analyse the clinical features and the surgical outcome of cataracts in JRT and LR in an ophthalmological reference Veterinary Hospital in the United Kingdom. Medical records from JRT and LR diagnosed with cataracts between January of 2015 and December of 2016 were retrospectively evaluated. Data related with identification, clinical history, pre-operative features and surgical outcome were analysed. 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 bilateral cataracts. The most prevalent type of cataracts was nuclear and cortical in JRT (42.9%), and subcapsular in LR (31.3%). Significant differences in cataract location within the lens were detected between the two breeds (P=0.013).Senile in JRT (n=7) and genetic in LR (n=7) were the most common aetiologies. Concomitant ocular lesions were more frequent in dogs presented with cataracts in advanced stages, and included lens position (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, 17 eyes (33.3%; JRT: n=11; LR: n=6) presented impaired vision and six eyes (11.8%; JRT: n=0; LR: n=6) were blind at last clinical record. Post-operative complications were detected in 11 eyes (21.6%), being more frequent in dogs presented with cataracts in advanced stages. The obtained 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.
    2017-07-19Dissertação de mestrado Acesso aberto Ver mais