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Veterinary Ophthalmology

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https://www.readbyqxmd.com/read/30238589/limbal-squamous-cell-carcinoma-in-a-rocky-mountain-horse-case-report-and-investigation-of-genetic-contribution
#1
Kelly E Knickelbein, Mary E Lassaline, Rebecca R Bellone
OBJECTIVE: To document a case of limbal squamous cell carcinoma (SCC) in a Rocky Mountain Horse stallion determined to be homozygous for the genetic risk factor (DDB2 c.1013C>T) strongly associated with the disease in Haflinger and Belgian horses, and to determine the frequency of this allele in a larger population of Rocky Mountain Horses. ANIMALS STUDIED: One privately owned Rocky Mountain Horse and 84 Rocky Mountain Horses screened for allelic frequency. PROCEDURES: A complete ophthalmic examination was performed on a Rocky Mountain Horse stallion for assessment of a mass affecting the right eye...
September 20, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/30211481/age-associated-changes-in-the-equine-flash-visual-evoked-potential
#2
Lena Ström, Måns Michanek, Björn Ekesten
OBJECTIVE: To investigate age-associated changes of flash visual evoked potentials (FVEPs) in sedated horses. ANIMAL STUDIED: Twenty-eight clinically healthy Standardbred Warmblooded trotters, aged 36 hours to 28 years. PROCEDURES: Light-adapted FVEPs and FERGs were recorded (An-vision RETIport, Roland-consult, Germany) in response to flash stimuli. Sedation was obtained using alpha-2-agonists intravenously. Akinesia of the eyelids was induced and pupils were dilated...
September 13, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/30211477/punctal-stenosis-in-6-dogs-following-the-long-term-use-of-topical-neomycin-polymyxin-b-dexamethasone
#3
Katelin Quantz, Jean Stiles
Six dogs were diagnosed with punctal stenosis following the long-term use of topical neomycin-polymyxin B-dexamethasone (NPD). All patients were initially presented for ophthalmic diseases requiring ongoing anti-inflammatory therapy. Five of the 6 dogs had previously or concurrently been treated with topical anti-inflammatory medications other than NPD. One patient exclusively received topical NPD prior to the diagnosis of punctal stenosis. The onset of punctal stenosis following therapy with NPD was variable among patients, ranging from 4 months to over 1 year...
September 13, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/30211474/a-bidirectional-corneoconjunctival-transposition-for-the-treatment-of-feline-corneal-sequestrum
#4
Vanessa Y Yang, Amber L Labelle, Carrie B Breaux
A case is presented of a 1-year-old Persian cat with a corneal sequestrum treated with a bidirectional corneoconjunctival transposition. The size of this lesion precluded use of a traditional corneoconjunctival transposition. At the time of writing, the patient maintained a clear visual axis with minimal scarring and no recurrence 6 months post-operatively. This report describes a novel surgical technique used to successfully treat a large feline corneal sequestrum.
September 13, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/30193404/effect-of-topical-application-of-0-5-proparacaine-on-corneal-culture-results-from-33-dogs-12-cats-and-19-horses-with-spontaneously-arising-ulcerative-keratitis
#5
Sydney G Edwards, David J Maggs, Barbara A Byrne, Philip H Kass, Mary E Lassaline
OBJECTIVE: To investigate the effect of topically applied proparacaine on bacterial and fungal culture results and to compare cytologic and culture results in patients with ulcerative keratitis. PROCEDURE: Corneal samples were collected from 33 dogs, 19 horses, and 12 cats with spontaneously arising ulcerative keratitis. Samples for bacterial (dogs, cats, horses) and fungal (horses) cultures were collected prior to and following application of 0.5% proparacaine or saline...
September 7, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/30136357/evaluation-of-retinal-morphology-of-canine-sudden-acquired-retinal-degeneration-syndrome-using-optical-coherence-tomography-and-fluorescein-angiography
#6
Stephanie C Osinchuk, Marina L Leis, Elyse M Salpeter, Lynne S Sandmeyer, Bruce H Grahn
PURPOSE: To describe the optical coherence tomography (OCT) and fluorescein angiography changes in dogs with sudden acquired retinal degeneration syndrome (SARDS). METHODS: Retinal OCT was performed on 10 SARDS dogs and eight control dogs. Tomograms were collected in four quadrants around the optic nerve. Measurements were collected from the photoreceptor layer, the outer nuclear layer, the outer retina, the inner retina and the whole retina thickness in all quadrants...
August 22, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/30109763/micropulse-%C3%A2-transscleral-cyclophotocoagulation-in-the-treatment-of-canine-glaucoma-preliminary-results-12-dogs
#7
Lionel Sebbag, Rachel A Allbaugh, Rachel A Strauss, Travis D Strong, Rita F Wehrman, Braidee C Foote, Gil Ben-Shlomo
OBJECTIVE: To describe the clinical application and effect of MicroPulse™ transscleral cyclophotocoagulation (MP-TSCPC) in dogs with glaucoma. ANIMALS STUDIED: Twelve dogs with primary (n = 8) or secondary (n = 4) glaucoma, aged 2-13 years (mean ± SD, 7.2 ± 3.8 years). PROCEDURES: MP-TSCPC was performed under sedation or general anesthesia. Laser duty cycle was 31.3%, laser power varied from 2000-2800 mW, and each hemisphere was treated for 90-180 seconds...
August 15, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/30109756/the-use-of-sulfur-hexafluoride-microbubbles-for-contrast-enhanced-ocular-ultrasonography-of-the-pecten-oculi-in-birds
#8
Thiago Alegre Coelho Ferreira, Gabrielle Fornazari, André Saldanha, Bruno Lunardeli, Bret A Moore, Fabiano Montiani-Ferreira
BACKGROUND: The pecten oculi is a vascular and pigmented structure localized within the posterior segment of all avian eyes. Its primary function is not fully understood yet. OBJECTIVE: As ultrasonography (US) is a useful imaging modality for evaluation of the pecten oculi, the objective of this study was to investigate the utility of an intravenous contrast solution of sulfur hexafluoride (SF6) microbubbles as a means of enhancing visualization of the pecten oculi in normal birds...
August 15, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/30109755/corneal-collagen-cross-linking-following-superficial-keratectomy-as-treatment-for-corneal-endothelial-cell-dystrophy-in-dogs-preliminary-clinical-study
#9
Jury Kim, Dong-Beom Ji, Naoaki Takiyama, Jaehyun Bae, Min-Su Kim
OBJECTIVE: To describe the outcome of corneal collagen cross-linking (CXL) combined with superficial keratectomy (SK) as treatment for corneal edema due to corneal endothelial dystrophy (CED) in dogs. ANIMALS STUDIED: Four eyes of four dogs (3 Shih Tzus and 1 English Cocker Spaniel) with corneal edema due to CED were treated with SK and CXL. Two were males, and two were females. PROCEDURE: Depending on corneal thickness, 500-700 μm of edematous cornea was removed by SK...
August 15, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/30109754/optical-coherence-tomography-and-molecular-analysis-of-sudden-acquired-retinal-degeneration-syndrome-sards-eyes-suggests-the-immune-mediated-nature-of-retinal-damage
#10
Sinisa D Grozdanic, Tatjana Lazic, Helga Kecova, Kabhilan Mohan, Markus H Kuehn
OBJECTIVE: To perform detailed analysis of retinal changes in dogs with SARDS using optical coherence tomography (OCT), funduscopy, and molecular analysis. ANIMALS: Subjects were 29 dogs from 12 US states and Canada diagnosed with SARDS by 8 ophthalmologists. An additional 7 eyes from 5 deceased SARDS dogs were used for molecular and histological analysis. PROCEDURES: Dogs were evaluated using chromatic pupil light reflex testing (cPLR), and electroretinography (ERG); subjects underwent complete ophthalmic examination, including funduscopy, retinal photography, and OCT, in addition to complete laboratory analysis, blood pressure evaluation, abdominal and thoracic radiographs, and computerized tomography (CT) imaging to assess possible systemic abnormalities...
August 15, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/30095241/initial-description-of-the-core-ocular-surface-microbiome-in-dogs-bacterial-community-diversity-and-composition-in-a-defined-canine-population
#11
Marina L Leis, Matheus O Costa
OBJECTIVE: To characterize the bacterial community residing on the conjunctiva of clinically healthy dogs. METHODS: Bacterial DNA from conjunctival swabs of 10 dogs with normal ocular examinations (both OD and OS, n = 20) was extracted, and 16S rRNA amplicons were sequenced using Illumina MiSeq 600. Resulting data were subjected to quality control steps, and analyzed for bacterial community richness and diversity, within- and between-group dissimilarity, and relative taxonomic composition...
August 10, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/30095212/retrospective-analysis-of-ocular-neuropathies-in-diabetic-dogs-following-cataract-surgery
#12
Braidee C Foote, Tammy M Michau, Anja Welihozkiy, Jessica M Stine
OBJECTIVES: To describe and compare the cumulative incidence and clinical progression of ocular neuropathies in diabetic dogs vs nondiabetic dogs following cataract surgery. METHODS: Medical records of 196 diabetic and 442 nondiabetic dogs who underwent cataract surgery between 2004 and 2015 were reviewed. The percentage of patients affected by neuropathy and potential risk factors were compared between groups. RESULTS: Patients with diabetes mellitus (DM) were 20...
August 10, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/30095211/microbiota-of-the-conjunctival-sac-of-120-healthy-cats
#13
Jessica Nina Büttner, Marianne Schneider, Jaqueline Csokai, Elisabeth Müller, Johanna Corinna Eule
OBJECTIVES: To describe the bacterial and fungal microbiota of the conjunctiva and factors influencing these microbiota of healthy cats. To evaluate the antimicrobial resistance profile and discuss the use of appropriate antimicrobial drugs. ANIMALS STUDIED: One hundred and twenty healthy cats PROCEDURES: Conjunctival samples with dry or premoistened swabs were obtained from both eyes and cultured for aerobic and anaerobic bacteria and fungi. In vitro bacterial, susceptibility testing was performed...
August 10, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/30052302/retrospective-evaluation-of-canine-palpebral-masses-treated-with-debulking-and-cryotherapy-46-cases
#14
Ashley E Zibura, Michala de Linde Henriksen, Aaron Rendahl, Christine C Lim, Christopher Reilly
PURPOSE: To evaluate the recurrence frequency and the time to recurrence of canine palpebral masses treated with debulking and cryotherapy. METHODS: Medical records of dogs that underwent debulking and cryotherapy for palpebral masses from December 2010 to November 2015 at the University of Minnesota's Veterinary Medical Center were reviewed. A telephone survey with owners was used to determine recurrence and time to recurrence. RESULTS: Forty-six masses (31 dogs) were included in this retrospective study...
July 27, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29975454/effects-of-intracameral-injection-of-epinephrine-and-2-lidocaine-on-pupil-diameter-intraocular-pressure-and-cardiovascular-parameters-in-healthy-cats
#15
Tássia Moara Amorim, Nathalie Moro Bassil Dower, Matias Bassinello Stocco, Laurem Hellem Pizoni, Alexandre Pinto Ribeiro
OBJECTIVES: To investigate the effects of the intracameral injection of epinephrine and two doses of 2% lidocaine on pupil diameter (PD), intraocular pressure (IOP), heart rate (HR), and mean arterial pressure (MAP) in healthy cats. METHODS: Five treatment groups were formed (10 cats/each). Animals received 0.2 mL of epinephrine, 0.2 or 0.3 mL of 2% lidocaine, or 0.2 mL of BSS. Cats were anesthetized, and all solutions were injected intracamerally. PD, IOP, HR, and MAP were assessed at baseline, following anterior chamber paracentesis (T0), and at every 5 minutes, until anesthesia was terminated (T60)...
July 5, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29963751/identification-of-bacteria-and-fungi-sampled-from-the-conjunctival-surface-of-normal-horses-in-south-east-queensland-australia
#16
Edith C G M Hampson, Justine S Gibson, Mayank Barot, Frances M Shapter, Ristan M Greer
OBJECTIVE: To identify bacteria and fungi found on the conjunctival surface of normal horse eyes; to investigate potential risk factors for these microflora; and to determine their susceptibility to common topical ophthalmic antimicrobials. ANIMALS STUDIED: A total of 95 client-owned horses were studied. PROCEDURES: Horses within sub-tropical Australia (South-East Queensland) were sampled once between April 2012 and March 2013. A conjunctival swab was taken from each eye and cultured for aerobic bacteria and fungi...
July 2, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29953719/conjunctival-bacterial-flora-and-antimicrobial-susceptibility-of-captive-and-free-living-sea-turtles-in-brazil
#17
Vinícius Cardoso-Brito, Ana Cláudia S Raposo, Thaís T Pires, Melissa H Pinna, Arianne P Oriá
PURPOSE: To describe the aerobic conjunctival bacterial flora of 3 especies of free-living and under human care sea turtles and determine its antimicrobial susceptibility in vitro. METHOD: Thirty-six sea turtles (72 eyes), juveniles and adults, 7 free-living Chelonia mydas and 8 Chelonia mydas, 4 Caretta caretta, 11 Eretmochelys imbricata, and 6 Lepidochelys olivacea under human care, were evaluated. Conjunctival cultures were collected for identification of aerobic bacteria and antimicrobial susceptibility testing for ciprofloxacin, chloramphenicol, gentamicin, neomycin, oxacillin, polymyxin B, tetracycline, and tobramycin using antibiotic disks...
June 28, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29457333/bimatoprost-sustained-release-intracameral-implant-reduces-episcleral-venous-pressure-in-dogs
#18
Susan S Lee, James Burke, Jie Shen, Alexandra Almazan, Werhner Orilla, Patrick Hughes, Jane Zhang, Huajiang Li, Craig Struble, Paul E Miller, Michael R Robinson
OBJECTIVE: To determine the effect of a bimatoprost sustained-release intracameral implant (Bimatoprost SR) on episcleral venous pressure (EVP) in normal dogs. METHODS: Normotensive beagle dogs were randomized to receive Bimatoprost SR 30 μg (n = 7) or sham injection (needle insertion only, n = 7) in one eye on day 1. EVP was measured with an episcleral venomanometer through day 65. Episcleral aqueous outflow vessels were identified using fluorescence imaging following intracameral injection of indocyanine green in one additional animal...
July 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29380923/phacoemulsification-outcomes-in-boston-terriers-as-compared-to-non-boston-terriers-a-retrospective-study-2002-2015
#19
Georgina M Newbold, William J Kelch, Thomas Chen, Daniel A Ward, Diane V H Hendrix
OBJECTIVES: To compare visual outcome and cause of blindness between two groups of dogs undergoing phacoemulsification. ANIMALS STUDIED: Study population consisted of 35 Boston terriers (BT; 70 eyes) and 77 non-Boston terriers (NBT; 154 eyes) that underwent bilateral phacoemulsification surgery. PROCEDURES: Medical records were reviewed to determine visual outcome, complications leading to blindness and follow-up. A Kaplan-Meier survival curve was used to estimate surgical success at 1 and 2 years postoperatively...
July 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29350449/lipoidal-corneal-degeneration-in-aged-falcons
#20
Bret A Moore, Joanne R Paul-Murphy, Kathleen L Adamson, Richard R Dubielzig, Thomas Kern, Ben J Gonzales, Peregrine Wolff, Christopher J Murphy
OBJECTIVE: To present a case series of idiopathic lipoidal corneal degeneration in falcons. ANIMALS STUDIED: Five falcons including three peregrine falcons (Falco peregrinus), one prairie falcon (Falco mexicanus), and one red-naped shaheen (Falco peregrinus babylonicus) were observed to develop slowly progressive corneal opacification that began at the temporal limbus and extended centripetally across the cornea over a period of years. Four of the birds were over 20 years old...
July 2018: Veterinary Ophthalmology
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