Deteção Molecular e prevalência de circovírus em papagaios-cinzentos (psittacus erithacus) em Portugal Continental
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2022
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Circovírus dos psitacídeos (PsCV, do inglês psittacine circovirus) ou vírus da doença
do bico e das penas (BFDV, do inglês beak and feather disease virus) é responsável pela Doença
do Bico e das Penas dos Psitacídeos (PBFD, do inglês Psittacine Beak and Feather Disease),
que afeta aves, apresentando particular relevância nos psitaciformes, incluindo o Papagaio Cinzento (Psittacus erithacus). Esta é uma infeção que pode assumir uma forma hiperaguda,
aguda, crónica ou subclínica, sendo responsável por elevados prejuízos económicos e de saúde
animal (incluindo a morte) em aves mantidas em cativeiro. A presença do vírus encontra-se
atualmente descrita em 40 países, com variações significativas na sua prevalência, de acordo
com a região geográfica dos estudos realizados. Contudo, existe uma lacuna de conhecimento
quanto à prevalência desta infeção no nosso País.
O presente trabalho teve, por isso, como principal objetivo estimar a prevalência de
BFDV em Psittacus erithacus assintomáticos mantidos em coleções de diversos criadores em
Portugal.
Um total de 100 colheitas sanguíneas foram realizadas a Psittacus erithacus
assintomáticos mantidos em coleções privadas de aves em várias regiões de Portugal
Continental. A presença de DNA viral foi avaliada através de uma reação em cadeia da
polimerase (PCR) nested. O DNA de BFDV foi detetado em 8 amostras, obtendo-se uma de
prevalência de 8%.
Dada a importância clínica deste vírus e a escassez de informação sobre a distribuição
do mesmo em Portugal, o presente trabalho representa um importante contributo
epidemiológico e clínico para a fauna cativa de Psittacus erithacus neste País.
Psittacine circovirus (PsCV) or beak and feather disease virus (BFDV) is responsible for Psittacine Beak and Feather Disease (PBFD), which affects birds, with particular relevance in psittaciformes, including the Grey Parrot (Psittacus erithacus). This is an infection that can take a hyperacute, acute, chronic or subclinical form, being responsible for high economic and animal health losses (including death) in birds kept in captivity. The presence of the virus is currently described in 40 countries, with significant variations in its prevalence, according to the geographical region of the studies that obtained it. However, there is a gap in knowledge about the prevalence of this infection in Portugal. Therefore, the main objective of this study was to estimate the prevalence of BFDV in asymptomatic Psittacus erithacus kept in collections from several breeders in Portugal. A total of 100 blood samples were taken from asymptomatic Psittacus erithacus kept in private bird collections in several regions of mainland Portugal. The presence of viral DNA was assessed by nested polymerase chain reaction (PCR). BFDV DNA was detected in 8 samples, with a prevalence of 8%. Given the clinical importance of this virus and the scarcity of information on its distribution in Portugal, this work represents an important epidemiological and clinical contribution to the captive fauna of Psittacus erithacus in this country.
Psittacine circovirus (PsCV) or beak and feather disease virus (BFDV) is responsible for Psittacine Beak and Feather Disease (PBFD), which affects birds, with particular relevance in psittaciformes, including the Grey Parrot (Psittacus erithacus). This is an infection that can take a hyperacute, acute, chronic or subclinical form, being responsible for high economic and animal health losses (including death) in birds kept in captivity. The presence of the virus is currently described in 40 countries, with significant variations in its prevalence, according to the geographical region of the studies that obtained it. However, there is a gap in knowledge about the prevalence of this infection in Portugal. Therefore, the main objective of this study was to estimate the prevalence of BFDV in asymptomatic Psittacus erithacus kept in collections from several breeders in Portugal. A total of 100 blood samples were taken from asymptomatic Psittacus erithacus kept in private bird collections in several regions of mainland Portugal. The presence of viral DNA was assessed by nested polymerase chain reaction (PCR). BFDV DNA was detected in 8 samples, with a prevalence of 8%. Given the clinical importance of this virus and the scarcity of information on its distribution in Portugal, this work represents an important epidemiological and clinical contribution to the captive fauna of Psittacus erithacus in this country.
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Orientação: Cátia Marques
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MESTRADO INTEGRADO EM MEDICINA VETERINÁRIA, MEDICINA VETERINÁRIA, DOENÇAS, PSITACÍDEOS, DISEASES, PARROTS, VETERINARY MEDICINE