Genome-resolved tracking of <i>Penicillium commune</i> in a bakery facility highlights long-term environmental persistence.

ABSTRACT: Mould spoilage is a major challenge in bakery production, yet the sources and persistence of contaminating strains remain poorly understood. We applied whole-genome sequencing (WGS) to 68 isolates from potato-cereal wraps and their production environment in a Norwegian bakery. Barcode-based identification using ITS, BenA, CaM, and RPB2 confirmed that 65 isolates belonged to the Penicillium commune/Penicillium fuscoglaucum lineage but could not fully resolve species status or resolve strain-level differences. Genome-wide comparison using Mash placed these isolates in a single clade within series Camembertiorum, distinct from cheese-associated taxa. SNP analysis revealed extremely low diversity within the main cluster (up to 60 SNPs after recombinati

SUBMITTER: Fagerlund A 

PROVIDER: S-EPMC12714999 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature