Comparative Molecular and Antimicrobial Analysis of Lactococcus garvieae and Lactococcus petauri from Marine and Freshwater Fish Farms in the Mediterranean.

ABSTRACT: Piscine lactococcosis is an emerging bacterial disease that threatens freshwater and marine aquaculture in the Mediterranean region. This study characterized isolates of Lactococcus garvieae and Lactococcus petauri from farmed fish through molecular identification, genomic typing and antimicrobial susceptibility testing. A total of 39 bacterial strains were analyzed using species-specific real-time PCR assays, multilocus sequence typing and broth microdilution to determine minimum inhibitory concentrations. Results suggest a temporal shift in freshwater systems, where L. garvieae predominated in earlier isolates (mainly ST13, CC4), while L. petauri (ST14, CC14) appears as the dominant species in recent years. In marine fish, only L. garvieae was detected,

SUBMITTER: Gonzalez-Martin D 

PROVIDER: S-EPMC12837333 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature