Sarcocystis calchasi Outbreak in Feral Rock Pigeons ( Columba livia) in California.
Vet Pathol
; 56(2): 317-321, 2019 Mar.
Article
em En
| MEDLINE
| ID: mdl-30222062
ABSTRACT
Twenty-two feral rock pigeons ( Columba livia) from 10 counties in California with ataxia, torticollis, and difficulty standing and flying were admitted to rehabilitation centers in late winter and spring of 2017 and died or were euthanized. Common necropsy findings included thin body condition, generalized deep red discoloration of organs, and hemorrhagic subcutaneous neck tissues. Meningoencephalitis was observed microscopically in 16 pigeons, and 3 also had protozoal schizonts in the brain. The most consistently affected regions of the brain were cerebellum and brainstem. Skeletal muscles, and less frequently the heart, contained large intrasarcoplasmic bradyzoites typically without inflammation. Fifteen of the 22 birds tested positive using pan- Sarcocystis polymerase chain reaction. The sequence of the amplicon was most closely related to S. calchasi, and the 8 subtyped sequences had 100% homology with S. calchasi. This investigation demonstrated the transcontinental and North American spread of S. calchasi causing a disease outbreak in free-ranging rock pigeons, thus warranting increased surveillance in susceptible native columbids.
Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Columbidae
/
Doenças das Aves
/
Surtos de Doenças
/
Sarcocystis
/
Sarcocistose
Limite:
Animals
País/Região como assunto:
America do norte
Idioma:
En
Revista:
Vet Pathol
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Estados Unidos