Comparative morphometric evaluation of hepatic hemosiderosis in wild Magellanic penguins (Spbeniscus magellanicus) infected with different Plasmodium spp. subgenera
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Citações na Scopus
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Tipo de produção
article
Data de publicação
2019
Título da Revista
ISSN da Revista
Título do Volume
Editora
BRAZILIAN COLL VETERINARY PARASITOLOGY
Autores
EWBANK, Ana Carolina
STREFEZZI, Ricardo de Francisco
SACRISTAN, Carlos
KOLESNIKOVAS, Cristiane Kiyomi Miyaji
MARTINS, Aryse
MAYORGA, Luis Felipe Silva Pereira
CATAO-DIAS, Jose Luiz
Citação
REVISTA BRASILEIRA DE PARASITOLOGIA VETERINARIA, v.28, n.1, p.68-79, 2019
Resumo
Avian malaria is one of the most important diseases of captive penguins. We employed morphometric techniques to evaluate hepatic hemosiderosis in rehabilitating wild Magellanic penguins (Spheniscus magellanicus) that were negative (n = 9) or naturally infected by different subgenera of Plasmodium spp. (n = 24), according with: Plasmodium subgenera (Haemamoeba, Huffia, Other lineages, and Unidentified lineages), severity of Plasmodium histopathological lesions, and concurrent diseases, age class (juvenile or adult plumage), sex (male, female or not determined), body score (emaciated, thin, good, excellent, not available), molt, presence or absence of oil contamination upon admission, iron supplementation, and rehabilitation center. The percentage of the area occupied by hemosiderin was called 'Index of Hepatic Hemosiderosis (IHH)'. Plasmodium-positive females presented significantly higher IHH values (17.53 +/- 12.95%) than males (7.20 +/- 4.25%; p = 0.041). We observed higher levels of congestion (p = 0.0182) and pneumonia (p = 0.0250) severity between Unidentified lineages vs. Huffia. We believe that the hepatic hemosiderosis observed in this study was multifactorial, the result of pathological processes caused by malaria, molting, hemoglobin and myoglobin catabolism during migration, anemia, concomitant diseases, and iron supplementation, all possibly potentiated by decreased liver mass. Further studies are needed to clarify the mechanisms of these hypotheses.
Palavras-chave
Avian malaria, iron, hemosiderin, liver, morphometry, penguin
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