Changes in the gill and gut microbiota of koi infected with carp edema virus.

ABSTRACT: Carp edema virus (CEV) is a contagious pathogen affecting mostly the gills of common carp (Cyprinus carpio) and impairing the functions of this organ. Moreover, CEV was reported to cause stress activation and modulation of the hosts immune system. Last but not least, secondary bacterial infections often occur during CEV infection. In this study, we assessed the impact of CEV infection on the microbiota in the gills, foregut, and hindgut of koi. Moreover, we studied expression of genes encoding antiviral proteins, proinflammatory cytokines, mucins, and tight junction proteins. We observed increased levels of cortisol and glucose in the blood plasma of CEV-infected fish, suggesting activation of stress response. Histopathological analysis of the gills showed occlusion of the intralamellar sp

SUBMITTER: Zawisza M 

PROVIDER: S-EPMC12849644 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature