RT Journal Article T1 Comparative genomics and evolutionary analysis of Lactococcus garvieae isolated from human endocarditis A1 Francés-Cuesta, Carlos A1 Ansari, Iván A1 Fernández-Garayzábal Fernández, José Francisco A1 Gibello Prieto, Alicia A1 González-Candelas, Fernando AB Lactococcus garvieae is a well-known pathogen of fish, but is rarely involved in infections in humans and other mammals. In humans, the main clinical manifestation of L. garvieae infections is endocarditis usually related to the ingestion of contaminated food, such as undercooked fish and shellfish. This study presents the first complete genomic sequence of a clinical L. garvieae strain isolated from a patient with endocarditis and its comparative analysis with other genomes. This human isolate contains a circular chromosome of 2 099 060 bp and one plasmid of 50 557 bp. In comparison with other fully sequenced L. garvieae strains, the chromosomal DNA of L. garvieae Lg-Granada carries a low proportion of insertion sequence elements and a higher number of putative prophages. Our results show that, in general, L. garvieae is a highly recombinogenic species with an open pangenome in which almost 30 % of its genome has undergone horizontal transfers. Within the genus Lactococcus, L. lactis is the main donor of genetic components to L. garvieae but, taking Lg-Granada as a representative, this bacterium tends to importmore genes from Bacilli taxa than from other Lactococcus species. PB Microbiology Society SN 2057-5858 YR 2022 FD 2022 LK https://hdl.handle.net/20.500.14352/94388 UL https://hdl.handle.net/20.500.14352/94388 LA eng NO Francés-Cuesta, C., Ansari, I., Fernández-Garayzábal, J. F., Gibello, A., & González-Candelas, F. (2022). Comparative genomics and evolutionary analysis of Lactococcus garvieae isolated from human endocarditis. Microbial genomics, 8(2), 000771 NO This is an open-access article distributed under the terms of the Creative Commons Attribution NonCommercial License. This article was made open access via a Publish and Read agreement between the Microbiology Society and the corresponding author’s institution.This work was supported by the Spanish Ministry of Science, Innovation, and Universities [RTI2018-098530-B-I00 and BFU2017-89594-R]. C-F.C. was supported by the Spanish Ministry of Science, Innovation, and Universities [BES-2015-074204]. NO Ministerio de Ciencia, Innovación y Universidades (España) DS Docta Complutense RD 20 abr 2025