Title (en)
Characterisation of Listeria monocytogenes Isolates from Hunted Game and Game Meat from Finland
Language
English
Description (en)
Listeria monocytogenes is an important foodborne zoonotic bacterium. It is a heterogeneous species that can be classified into lineages, serogroups, clonal complexes, and sequence types. Only scarce information exists on the properties of L. monocytogenes from game and game meat. We characterised 75 L. monocytogenes isolates from various game sources found in Finland between 2012 and 2020. The genetic diversity, presence of virulence and antimicrobial genes were studied with whole genome sequencing. Most (89%) of the isolates belonged to phylogenetic lineage (Lin) II and serogroup (SG) IIa. SGs IVb (8%) and IIb (3%) of Lin I were sporadically identified. In total, 18 clonal complexes and 21 sequence types (STs) were obtained. The most frequent STs were ST451 (21%), ST585 (12%) and ST37 (11%) found in different sample types between 2012 and 2020. We observed 10 clusters, formed by closely related isolates with 0–10 allelic differences. Most (79%) of the virulence genes were found in all of the L. monocytogenes isolates. Only fosX and lin were found out of 46 antimicrobial resistance genes. Our results demonstrate that potentially virulent and antimicrobial-sensitive L. monocytogenes isolates associated with human listeriosis are commonly found in hunted game and game meat in Finland
Keywords (en)
Listeria monocytogenes; game; whole genome sequencing; sequence type; virulence; antimicrobial resistance
DOI
10.3390/foods11223679
Author of the digital object
Maria Fredriksson-Ahomaa  (University of Helsinki)
Peter Paulsen  (University of Veterinary Medicine Vienna)
Annamari Heikinheimo  (University of Helsinki)
Viivi Heljanko  (University of Helsinki)
Paula Kurittu  (University of Helsinki)
Mikaela Sauvala  (University of Helsinki)
Format
application/pdf
Size
1.1 MB
Licence Selected
Type of publication
Article
Name of Publication (en)
Foods
Pages or Volume
11
Volume
11
Number
22
Publisher
MDPI
Publication Date
2022