Person: González Alonso-Alegre, Elisa-Margarita
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First Name
Elisa-Margarita
Last Name
González Alonso-Alegre
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Veterinaria
Department
Medicina y Cirugía Animal
Area
Medicina y Cirugía Animal
Identifiers
5 results
Search Results
Now showing 1 - 5 of 5
Item Characterisation of cataracts and other ophthalmic findings in various species of captive penguins(Veterinary Record (VetRecord), 2023) González Alonso-Alegre, Elisa-Margarita; Martínez Nevado, Eva; Pérez de Quadros, Lino; de la Riva-Fraga, Manuel; Rodríguez Álvaro, AlfonsoBackground: Identification of ophthalmic diseases that affect vision and/or cause discomfort should be a priority in captive penguins to guarantee their wellness and life quality. Methods: An observational study was conducted. A routine ophthalmologic examination was performed on eighty clinically normal penguins (160 eyes). Results: Ocular lesions were frequent (56% of penguins). Cataracts were the most common (48.8% of penguins). Cortical cataracts (63% of eyes) and posterior subcapsular cataracts (27.4%) were the most common. All maturation stages were found; incipient cataracts (52.1% of eyes with cataracts) were predominant, while morgagnian cataracts (8.2%) were the least frequent. A correlation existed between lenticular changes and increasing age. Uveitis was present in 43.8% of eyes with cataracts, and ectropion uveae was the predominant clinical sign. Other ocular findings included blepharitis (3.8% of all eyes), corneal leukoma (5.6%) and posterior lens subluxation (7.5%). Limitations: The small number of birds of some species prevented comparison of ophthalmic findings between them. Conclusion: This study corroborates the high prevalence of ocular lesions in captive penguins. Cataracts were frequent and age related. Most cataracts were cortical and the predominant maturation stage was incipient. Lens induced uveitis was a common finding. Lowered intraocular pressure was related to cataract formation.Item Atypical presentation of cryptococcus neoformans in a koala (phascolarctos cinereus): a magnetic resonance imaging and computed tomography study(Journal of Zoo and Wildlife Medicine, 2017) Martínez-Nevado, Eva; García García, Juncal; García Real, María Isabel; Martínez De Merlo, Elena; Rodríguez Álvaro, Alfonso; Jiménez Martínez, María De Los Ángeles; González Alonso-Alegre, Elisa-MargaritaCryptococcosis is a worldwide and potentially fatal mycosis documented in wild and captive koalas (Phascolarctos cinereus) caused by Cryptococcus neoformans. Though mainly a subclinical disease, when the nasal cavity is affected, epistaxis, mucopurulent nasal discharge, dyspnea, and facial distortion may occur. This report describes a case of cryptococcosis in a koala where unilateral exophthalmos was the only evident clinical sign and magnetic resonance imaging and computed tomography findings are described. Both advanced imaging techniques should be considered as standard and complementary techniques for nasal cavity evaluation in koalas.Item Central corneal thickness and intraocular pressure in captive black-footed penguins (Sphenicus dermersus)(Veterinary Ophthalmology, 2014) Martinez Nevado, Eva; González Alonso-Alegre, Elisa-Margarita; Caro Vadillo, Alicia; Rodríguez Álvaro, AlfonsoObjective To determine the central corneal thickness (CCT) by ultrasonic pachymetry and the effect of these values on the measurements of intraocular pressures (IOP) with rebound tonometry (TonoVet®) in a captive flock of black-footed penguins (Spheniscus dermersus). Variations in CCT by age and weight, and variations in IOP by age were compared. Animal studied Both eyes of 18 clinically normal black-footed penguins (Spheniscus dermersus) were used. Procedure The IOP was measured by the TonoVet® in both eyes of all the penguins. CTT measurements were performed 5 min later in all eyes using an ultrasound pachymeter. Results The mean IOP values ± SD were 31.77 ± 3.3 mm Hg (range of mean value: 24–38). The mean CCT values were 384.08 ± 30.9 μm (range of mean value: 319–454). There was no correlation between IOP and CCT values (P = 0.125). There was no difference in CCT measurements by age (P = 0.122) or weight (P = 0.779). A correlation was observed (P = 0.032) between IOP values and age. The coefficient of correlation was negative (ρ = −0.207). Conclusions Ultrasound pachymetry has shown to be a reliable and easy technique to measure CCT in penguins. No correlation was observed between IOP and CCT values in this study. IOP showed a significant but weak decrease as age increased in the black-footed penguin.Item Atypical chorioretinal coloboma in a Golden Retriever: a retinographic, fluorographic, and optical coherence tomography study(Veterinary Ophthalmology, 2015) González Alonso-Alegre, Elisa-Margarita; Rodríguez Álvaro, Alfonso; Esteban Martin, JavierPurpose: To report a case of canine atypical chorioretinal coloboma where ophthalmoscopic, fluoroangiographic and optical coherence tomography characteristics are described. Animal Studied: A 2-year-old Golden Retriever dog in which routine ophthalmoscopic examination allowed diagnosis of a posterior coloboma on the left eye. Procedures: Retinography, fluorescein angiography, and optical coherence tomography were performed to characterize the lesion of the left fundus. Results: Ophthalmoscopy revealed a pigmented circumscribed lesion dorsal to the optic nerve of the left fundus, surrounded by small areas of hyper-reflectivity and retinal vessels with an abnormal pattern. Fluoroangiography revealed a constant hypofluorescence of the defect and a complete altered vascular pattern associated with the coloboma. Optical coherence study demonstrated an important craterlike depression showing an atrophic neurosensory retina, and a lack of retinal pigment epithelium and choroidal tissue. Conclusions: Fluoroangiographic and optical coherence tomographic studies of an atypical chorioretinal coloboma in a dog are reported for the first time. Both imaging techniques are of great importance to characterize this type of congenital defects.Item Characterization of corneal impression cyotology in dogs and its application in the diagnosis of keratoconjunctivitis sicca(The Veterinary Record, 2019) Lejarza Illaro, Mikel; Rodríguez Álvaro, Alfonso; Sánchez Maldonado, María Belén; González Alonso-Alegre, Elisa-MargaritaObjective: Determine morphological and morphometric parameters of corneal epithelium in dogs, and determine the cellular alterations that occur in canine keratoconjunctivitis sicca (KCS) using impression cytology. Study animals: 60 dogs divided into 2 groups: dogs with Schirmer tear test (STT) ≥ 15 mm/min and absence of ocular disease, and dogs with STT < 15 mm/min and clinical signs of KCS. Procedures: Impression cytology was used to collect corneal samples. The percentage of eyes with cell changes, the number of such cells and the percentage of cells with structural alterations in each group were determined. The possible correlation between corneal epithelium alterations and decreased tear production was evaluated. Results: A significant positive correlation existed between STT and the area of the cytoplasm and nucleus of corneal cells. A significant negative correlation was found between STT and the nucleus/cytoplasm (N:C) ratio, and the presence of cellular changes. Significant difference existed between the number of pyknotic nuclei, being higher among animals with all stages of KCS. Conclusion: Corneal impression cytology can be used to assess the corneal epithelium in healthy eyes and eyes with KCS, demonstrating its usefulness as a diagnostic tool especially in mild and early cases.