Interazioni tra batteri e Batrachochytrium dendrobatidis

Interazioni tra batteri 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:
9786209201356
35,69 €
IVA incluido
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Le minacce patogene alla biodiversità contribuiscono in modo significativo all’estinzione di comunità e specie e, per gli anfibi, il fungo chitridio Batrachochytrium dendrobatidis (Bd) rappresenta la minaccia più grave. Le dinamiche ospite-patogeno tra anfibi e Bd non sono ancora del tutto chiare; tuttavia, studi recenti hanno dimostrato che la composizione della comunità microbica sui tessuti epidermici degli anfibi può favorire la resistenza alla malattia. I batteri antidermatofiti possono inibire i funghi che necessitano della cheratina dell’epidermide per crescere. Due specie, Janthinobacterium lividum e Pseudomonas fluorescens, sono state trovate su anfibi resistenti al Bd. In una serie di tre esperimenti individuali, gli anfibi sensibili al Bd (cioè Lithobates shpenocephalus) sono stati esposti a questi batteri sia prima che dopo l’infezione sperimentale da Bd. J. lividum e P. fluorescens hanno provocato una forte risposta immunitaria e, pertanto, possono essere utilizzati per prevenire la mortalità indotta dal Bd. Al contrario, nessuno dei due batteri si è dimostrato efficace quando applicato a quelle rane che erano state precedentemente esposte al Bd. Questi risultati possono essere utilizzati per affrontare altri aspetti dell’immunità degli anfibi quando il Bd e i batteri inducono cambiamenti nella struttura della loro comunità epidermica.

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