Genomic characterization of Listeria monocytogenes isolated from small ruminants in integrated crop-livestock systems.

ABSTRACT: Listeria monocytogenes (L. monocytogenes), a foodborne pathogen shed by asymptomatic ruminants, poses a contamination risks in integrated crop-livestock systems (ICLS), where ruminants are introduced to graze cover crops prior to replanting fresh produce in a field. As a follow-up study, we conducted whole genome sequencing of 30 L. monocytogenes isolates obtained from sheep and goat fecal and soil samples collected during our previously published ICLS field trial studies (2019-2022) at organic farms in California and Minnesota. One goat fecal isolate was genetically identical to one soil isolate collected at seven days post-grazing. Most isolates (28/30, 93.3%) belonged to lineage I, specifically to serogroup IVb or IVb-v1, and were classified as CC1 or CC554, both clonal complexes previo

SUBMITTER: Cheong S 

PROVIDER: S-EPMC12870440 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature