ABSTRACT
Two male patients presented with unilateral blurred vision. A small motile worm was found in the vitreous cavity in both cases. In one case, another dead, disintegrated worm was noted in the inferior portion of the vitreous cavity. On each eye, vitreous surgery was performed and the worm was removed by an aspirator. Both worms were identified as Angiostrongylus cantonensis. Since both patients had no signs of meningitis, lumbar puncture was not done. Long-term follow-up confirmed the benefit and safety of the vitreous surgery. Fluorescein angiography revealed severe pigmentary alteration, probably from inflammation of the choroid and retina due to subretinal migration of the worm prior to access into the vitreous cavity.
Subject(s)
Adult , Angiostrongylus cantonensis , Animals , Eye Infections, Parasitic/complications , Humans , Male , Strongylida Infections/complications , Treatment Outcome , Vision Disorders/parasitology , Vitrectomy/methods , Vitreous BodyABSTRACT
La primera parte es una revisión bibliográfica para conocer las generalidades de la oncocercosis y el daño ocular atribuido a ella, antecedentes históricos, análisis del medio ambiente, vector, parásito, ciclos biológicos, histopatología, inmunología, cuadros clínicos sistémico y ocular y tratamiento actual. La segunda parte es la descripción de un estudio transversal efectuado en la región del Soconusco, Chiapas en 1983, donde se estudiaron 271 pacientes con oncocercosis comprobada con biopsia cutánea, para conocer el daño ocular secundario a oncocercosis en México. El hallazgo más frecuente fue la queratitis punteada (daño transitorio), seguida por la queratitis esclerosante, las secuelas de uveítis y coriorretinitis (daño permanente) que se asocian a la mayor edad del indivíduo y al mayor tiempo de infección. No se encontraron pacientes con glaucoma