Acute, fatal Sarcocystis falcatula infection in rose-ringed parakeets (Psittacula krameri).

Autor: Zwarg T; The Fauna Division of the Municipal Secretariat for Green and Environment of the Municipality of São Paulo, SP, Brazil., Raso TF; Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo (USP), São Paulo, SP, Brazil., de Carvalho MPN; Department of Veterinary Clinics and Surgery, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil., Santos RL; Department of Veterinary Clinics and Surgery, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil., Dos Santos DO; Department of Veterinary Clinics and Surgery, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil., Llano HAB; Investigation Group (GINVER), School of Veterinary Medicine, Corporación Universitaria Remington, Medellín, Colombia., Soares RM; Department of Preventive Veterinary Medicine and Animal Health, School of Veterinary Medicine and Animal Science, University of São Paulo (USP), São Paulo, SP, Brazil. Electronic address: rosoares@usp.br.
Jazyk: angličtina
Zdroj: Veterinary parasitology, regional studies and reports [Vet Parasitol Reg Stud Reports] 2023 Nov; Vol. 46, pp. 100935. Date of Electronic Publication: 2023 Oct 05.
DOI: 10.1016/j.vprsr.2023.100935
Abstrakt: Sarcocystosis is an important avian disease that affects several intermediate host species. Birds not endemic from Americas, like Old World psittacine species, appear to be more susceptible to lethal infection than New World psittacine species. The aim of this study was to investigate the sudden death of rose-ringed parakeets (Psittacula krameri) in an exotic private parrot's aviary. Macroscopically, the most prevalent findings were severe lung congestion, slight superficial myocardial hemorrhagic lesions, enlarged liver and congestion of meningeal vessels. The initial diagnosis of sarcocystosis was made in all birds by microscopic observations of intravascular pulmonary schizonts, as well hepatitis, myocarditis, and nephritis. Immunohistochemistry for detection of Sarcocystis sp. antigen revealed an intense immunoreactivity in the lungs. Molecular identification of Sarcocystis falcatula were obtained by nested PCR and sequencing of amplified fragments of internal transcribed spacer 1 (ITS1) and three surface antigen-coding genes (SAG2, SAG3 and SAG4). SAG-based phylogenies showed a close relatedness of the isolate described here and S. falcatula previously detected in naturally infected native birds, which suggests that the isolates that affected ringnecks are a common isolate that circulates in Brazil.
Competing Interests: Declaration of Competing Interest The authors declare no conflicts of interest.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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