Project description:Listeria monocytogenes is a pathogen typically acquired through the ingestion of foods. It has been specifically reported that the pathogen is widely distributed in raw seafood in Japan. Here, we report the whole-genome sequence and sequence type (ST) of a Listeria monocytogenes strain isolated from salmon roe sold in the Japanese retail market.
Project description:Listeria monocytogenes is an opportunistic invasive foodborne pathogen. Here, we performed whole-genome sequencing of L. monocytogenes strain F4244 (serotype 4b) using Illumina sequencing. The sequence showed 94.5% identity with strain F2365, serotype 4b, and 90.6% with EGD-e, serotype 1/2a.
Project description:In the present study, a total of 50 raw camel meat samples were analyzed for the presence of Listeria monocytogenes. The isolates were characterized via morphological and culture analyses; identification of isolates was confirmed by polymerase chain reaction (PCR) and sequencing of the listeriolysin O gene. The API Listeria system was used for further chemical identification and verification of the strains. L. monocytogenes was identified in eight raw camel meat samples, which was the highest incidence (16%) of contamination, followed by L. seeligeri 3(6%), L. innocua and L. welshimeri 2 (2% each), and L. grayi 1 (1%). According to Basic Local Alignment Search Tool (BLAST) analysis, isolated strains that were positive for the listeriolysin O gene were >99% similar to the published database sequences for L. monocytogenes strain LM850658 (sequence ID: CP009242.1). We studied the antibiotic resistance profile of the L. monocytogenes strains with common antibiotics used to treat human listeriosis and demonstrated that almost all strains tested were susceptible to the antibiotics.
Project description:The complete genome sequence of the persistent Listeria monocytogenes strain R479a isolated from smoked salmon in Denmark and belonging to lineage II, serovar 1/2a, and multilocus sequence type 8 (ST8) is presented here.
Project description:Here, we report the genome sequence of Listeria monocytogenes serovar 1/2a strain IZSAM_Lm_15_17439_A144, isolated in Italy from a patient during a Listeria monocytogenes outbreak in 2008. This strain showed 98.9% sequence identity to a strain isolated in Canada in the same year.
Project description:This report presents the complete and annotated genome sequence of the naturally nonpathogenic Listeria monocytogenes serovar 4a strain M7, isolated from cow's milk in Zhejiang province, China.
Project description:More than 98% of reported human listeriosis cases are caused by specific serotypes within genetic lineages I and II. The genome sequence of Listeria monocytogenes lineage III strain HCC23 (serotype 4a) enables whole genomic comparisons across all three L. monocytogenes lineages. Protein cluster analysis indicated that strain HCC23 has the most unique protein pairs with nonpathogenic species Listeria innocua. Orthology analysis of the genome sequences of representative strains from the three L. monocytogenes genetic lineages and L. innocua (CLIP11262) identified 319 proteins unique to nonpathogenic strains HCC23 and CLIP11262 and 58 proteins unique to pathogenic strains F2365 and EGD-e. BLAST comparison of these proteins with all the sequenced L. monocytogenes and L. innocua revealed 126 proteins unique to serotype 4a and/or L. innocua; 14 proteins were only found in pathogenic serotypes. Some of the 58 proteins unique to pathogenic strains F2365 and EGD-e were previously published and are already known to contribute to listerial virulence.
Project description:Listeria monocytogenes is an important foodborne pathogen that causes infections in humans and animals and has a high mortality rate. The complete genome sequence of L. monocytogenes strain NTSN, a highly virulent and serovar 4b strain isolated from the brains of sheep in Jiangsu Province, China, is presented here.
Project description:The foodborne pathogen Listeria monocytogenes causes severe disease mainly in the vulnerable populations of the young, old, pregnant, and immunocompromised. Here, we present the genome sequence of L. monocytogenes H34, a serotype 1/2b, lineage I, sequence type 489 (ST489) strain, isolated from a neonatal sepsis case in Uruguay.
Project description:Comparative genomic analysis between pathogenic and nonpathogenic Listeria monocytogenes strains provides a good model for studying the virulence of this organism. Here, we report the genome sequence of the nonpathogenic L. monocytogenes strain F6540 (sequence type 360) identified specifically in food samples in Ontario, Canada, in 2010.