Central Nervous System Toxoplasmosis in Roller Canaries

Publication Type:Journal Article
Year of Publication:1995
Authors:Lindsay, DS, Gasser, RB, Harrigan, KE, Madill, DN, Blagburn, BL
Journal:Avian Diseases
Volume:39
Issue:1
Date Published:1995
ISBN Number:00052086
Keywords:Australia, Coracias, Coracias garrulus, Coraciidae, Fringillidae, Serinus, Serinus canaria, Serinus serinus
Abstract:Several birds in a flock of 40 Roller canaries (Serinus canaria) from an outdoor aviary in Victoria, Australia, developed central nervous system signs that included blindness, nystagmus, ataxia, and head rotation. Four died, and four were euthanatized. Two euthanatized birds were submitted for microscopic examination of tissues. Brain lesions in both birds consisted of scattered foci of nonsuppurative meningoencephalitis with gliosis, mild to moderately extensive lymphocytic/plasmacytic perivascular cuffs, and a patchy increased prominence of cerebral blood vessels associated with hypertrophy of the vascular endothelium and/or thickening of their connective tissue walls. These lesions were associated with the presence of Toxoplasma gondii tissue cysts. Lesions in the eyes of both birds were bilateral and consisted of severe plasmacytic/granulomatous ophthalmitis. Surviving birds were treated with trimethoprim and sulfadiazine, no subsequent deaths occurred, and no new cases developed over an 8-month period. /// Varias aves en una parvada de 40 canarios (Serinus canaria) de un aviario en Victoria, Australia, desarrollaron signos en el sistema nervioso central que incluyó ceguera, nistagmus, ataxia y rotación de la cabeza. Cuatro murieron y cuatro fueron sacrificados, dos de estas aves fueron remitidas para examen microscópico de los tejidos. Las lesiones cerebrales en ambas aves consistieron de focos diseminados de meningoencefalitis no supurativa con gliosis, manguito perivascular linfocítico-plasmático que variaba de suave a moderado, y un aumento prominente de los vasos sanguíneos cerebrales asociado con la hipertrofia del endotelio vascular o con el engrosamiento de las paredes del tejido conectivo. Estas lesiones fueron asociadas con la presencia de quistes tisulares de Toxoplasma gondii. Las lesiones en los ojos de ambas aves fueron bilaterales y consistieron de oftalmitis plasmocítica o granulomatosa. Las aves sobrevivientes fueron tratadas con trimetroprina y sulfadiacina y no se presentó más mortalidad ni ocurrieron nuevos casos en un período de 8 meses.
URL:http://www.jstor.org/stable/1592006
Short Title:Avian Diseases
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