Weissellosis in rainbow trout in Colombia

Weissellosis is an emergent disease caused by Weissella, a Gram-positive bacteria correlated with hemorrhagic illness and mortality in farm-raised trout in several countries. The current study reports the first outbreaks of weissellosis by Weissella ceti in rainbow trout (Oncorhynchus mykiss), which caused severe mortalities in trout farms in Colombia between May 2016 to June 2019. The disease occurred in several farms irrigated by the same river where temperatures were above 17 °C. Symptoms of the disease were limited almost exclusively to trout above 250 g. The clinical signs consisted of lethargic and anorexic fish, swimming in circles at the surface or against the walls. Pathological findings were mainly ocular lesions like bilateral exophthalmia, periocular and intraocular hemorrhage, lenticular opacity and corneal rupture usually leading to blindness, muscular hemorrhages and necrosis. Microbial isolating from eye, brain, kidney, liver and muscle was performed and W. ceti was confirmed by amplification and sequencing of the 16S rRNA. The aim of this work was to characterize the Weisellosis by Weissella ceti in trouts in Colombia, including microbiological isolating, molecular analysis, gross and microscopic characterization.

A retrospective histologic study of 140 cases of clinically significant equine ocular disorders

Ocular diseases are an important category in equine medicine; however, most articles regarding histologic ocular lesions in horses are exclusive to a specific condition and do not provide a complete review of clinically significant ocular disease frequency in a diagnostic laboratory. We reviewed sections of equine eyes from 140 cases (98 enucleations [biopsies] and 42 autopsies) with clinically relevant ocular alterations at 2 diagnostic centers in the United States. The most common primary conditions were non-traumatic keratitis (36), equine recurrent uveitis (ERU; 31), traumatic injuries (22), ocular and periocular neoplasms (19), and uveitis and/or endophthalmitis resulting from sepsis (18). Congenital anomalies (3) and retinal atrophy and detachment alone (3) were infrequent. Non-traumatic keratitis was frequently accompanied by anterior uveitis (22), corneal rupture (16), pre-iridal fibrovascular membrane formation (13), and secondary mycotic infection (11). ERU was the second and third most prevalent disease in autopsies and enucleations, respectively. This condition was commonly associated with glaucoma (15). Glaucoma (25) and cataract (20) were the most prevalent secondary alterations in the evaluated cases. Keratitis (20) and corneal rupture (16) were among the most prevalent consequences of trauma. Information presented herein may guide clinicians and pathologists, contributing to the early diagnosis of potentially vision-impairing conditions and raising the chances of successful treatment and cure.

Case Series of Brittle Cornea Syndrome

Purpose. This case series demonstrate diagnostic features, treatment options, and challenges for Brittle Cornea Syndrome. Observations. Three cases presented with bluish sclera and extremely thin cornea. Genetic workup was performed and confirmed the diagnosis of Brittle Cornea Syndrome, a rare autosomal recessive disorder characterized by corneal thinning and blue sclera. Case 1 was a 4-year-old boy who developed cataract and glaucoma after undergoing right tectonic penetrating keratoplasty (PK) secondary to a spontaneous corneal rupture. Glaucoma was controlled medically. Later, the kid underwent right transcorneal lensectomy and vitrectomy with synechiolysis. After 6 weeks, he sustained graft dehiscence that was repaired using onlay patch graft. Case 2 was a 7-year-old boy who underwent PK in the right eye, then a pericardial patch graft in the left eye following spontaneous corneal rupture. Glaucoma in both eyes was controlled medically. Case 3 was the 2-year-old sister of the 2nd case. She had a pachymetry of 238 μm OD and 254 μm OS. In the 3 cases, parents were instructed to take protective measures for both eyes and to continue with follow-up visits. Also, they were instructed to have regular screenings for late-onset hearing loss, dental abnormalities, and bone deformities. Conclusions. Long-term follow-up of children diagnosed with Brittle Cornea Syndrome is paramount to minimize the morbidity of corneal rupture and late-onset extraocular conditions.

Brittle Cornea Syndrome: Case Report with Novel Mutation in thePRDM5Gene and Review of the Literature

A 3-year-old boy presented with acute corneal hydrops on the left eye and spontaneous corneal rupture on the right eye. A diagnosis of brittle cornea syndrome was confirmed by molecular analysis. A novel mutation, the homozygous variant c.17T>G, p.V6G, was found in the gene for PR-domain-containing protein 5 (PRDM5) in exon 1. Brittle cornea syndrome is a rare connective tissue disease with typical ocular, auditory, musculoskeletal, and cutaneous disorders. Almost all patients suffer from declined vision due to corneal scarring, thinning, and rupture. The most common ophthalmologic findings include keratoconus, progressive central corneal thinning, high myopia, irregular astigmatism, retinal detachment, and high risk for spontaneous corneal or scleral rupture. In addition to describing the case with a novel mutation here we review the current literature on brittle cornea syndrome pathogenesis, clinical findings, and therapy.

Spontaneous Corneal Rupture One Week after Intrastromal Ring Segment Surgery

ABSTRACT Purpose To report a case of spontaneous (nontraumatic) rupture of the cornea 7 days after intrastromal ring segment surgery in a patient with pellucid marginal degeneration (PMD). Methods Case report. Results A 37-year-old African woman complains blurred vision, photophobia, foreign body sensation and redness in her left eye 7 days after an uneventful implantation of a Ferrara intrastromal corneal ring segment (ICRS) for PMD. Left eye examination revealed the rupture in the thinnest point of the cornea between the limbus and the implanted lower ICRS, and the iris prolapsed through the wound. Conclusion To the best of our knowledge, this case is the first documented spontaneous rupture of the thinnest point of the cornea in a patient with PMD treated successfully with the ICRS procedure. We examined the causes of this early and dramatic evolution and emphasize the importance of a careful follow-up. How to cite this article Vaiano AS, De Benedetti G, Perno R, del Monte G, Valente C, Caramello G. Spontaneous Corneal Rupture One Week after Intrastromal Ring Segment Surgery. Int J Kerat Ect Cor Dis 2013;2(1):43-46.