Interações entre bactérias e Batrachochytrium dendrobatidis

Interações entre bactérias e Batrachochytrium dendrobatidis

Alissa M. Carissimi

35,69 €
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Editorial:
KS OmniScriptum Publishing
Año de edición:
2025
Materia
Ecología, la biosfera
ISBN:
9786209206474
35,69 €
IVA incluido
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As ameaças patogénicas à biodiversidade contribuem significativamente para a extinção de comunidades e espécies, e para os anfíbios, o fungo quitrídio Batrachochytrium dendrobatidis (Bd) é a maior ameaça. A dinâmica hospedeiro-patógeno entre anfíbios e Bd ainda não é totalmente compreendida; no entanto, estudos recentes demonstraram que a composição da comunidade microbiana nos tecidos epidérmicos dos anfíbios pode promover resistência à doença. As bactérias antidermatófitas podem inibir os fungos que necessitam de queratina da epiderme para crescer. Duas espécies, Janthinobacterium lividum e Pseudomonas fluorescens, foram encontradas em anfíbios resistentes ao Bd. Numa série de três experiências individuais, anfíbios suscetíveis ao Bd (ou seja, Lithobates shpenocephalus) foram expostos a estas bactérias antes e depois da infecção experimental pelo Bd. J. lividum e P. fluorescens provocaram uma forte resposta imunitária e, portanto, podem ser utilizadas para prevenir a mortalidade induzida pelo Bd. Por outro lado, nenhuma das bactérias se mostrou eficaz quando aplicada em sapos com exposição prévia ao Bd. Esses resultados podem ser usados para abordar outros aspetos da imunidade dos anfíbios quando o Bd e as bactérias induzem alterações na estrutura da sua comunidade epidérmica.

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