PMID- 24129621 OWN - NLM STAT- MEDLINE DCOM- 20140506 LR - 20220408 IS - 1972-2680 (Electronic) IS - 1972-2680 (Linking) VI - 7 IP - 10 DP - 2013 Oct 15 TI - Genomics of an emerging clone of Salmonella serovar Typhimurium ST313 from Nigeria and the Democratic Republic of Congo. PG - 696-706 LID - 10.3855/jidc.3328 [doi] AB - INTRODUCTION: Salmonella enterica serovar Typhimurium ST313 is an invasive and phylogenetically distinct lineage present in sub-Saharan Africa. We report the presence of S. Typhimurium ST313 from patients in the Democratic Republic of Congo and Nigeria. METHODOLOGY: Eighteen S. Typhimurium ST313 isolates were characterized by antimicrobial susceptibility testing, pulsed-field gel electrophoresis (PFGE), and multilocus sequence typing (MLST). Additionally, six of the isolates were characterized by whole genome sequence typing (WGST). The presence of a putative virulence determinant was examined in 177 Salmonella isolates belonging to 57 different serovars. RESULTS: All S. Typhimurium ST313 isolates harbored resistant genes encoded by blaTEM1b, catA1, strA/B, sul1, and dfrA1. Additionally, aac(6')1aa gene was detected. Phylogenetic analyses revealed close genetic relationships among Congolese and Nigerian isolates from both blood and stool. Comparative genomic analyses identified a putative virulence fragment (ST313-TD) unique to S. Typhimurium ST313 and S. Dublin. CONCLUSION: We showed in a limited number of isolates that S. Typhimurium ST313 is a prevalent sequence-type causing gastrointestinal diseases and septicemia in patients from Nigeria and DRC. We found three distinct phylogenetic clusters based on the origin of isolation suggesting some spatial evolution. Comparative genomics showed an interesting putative virulence fragment (ST313-TD) unique to S. Typhimurium ST313 and invasive S. Dublin. FAU - Leekitcharoenphon, Pimlapas AU - Leekitcharoenphon P AD - Division of Bacterial Genomics and Epidemiology, WHO Collaborating Center for Antimicrobial Resistance in Food borne Pathogens and European Union Reference Laboratory for Antimicrobial Resistance, National Food Institute and Center for Biological Sequence Analysis, Department of System Biology Technical University of Denmark, Kemitorvet, Building 204, DK-2800 Kgs. Lyngby, Denmark. pile@food.dtu.dk. FAU - Friis, Carsten AU - Friis C FAU - Zankari, Ea AU - Zankari E FAU - Svendsen, Christina Aaby AU - Svendsen CA FAU - Price, Lance B AU - Price LB FAU - Rahmani, Maral AU - Rahmani M FAU - Herrero-Fresno, Ana AU - Herrero-Fresno A FAU - Fashae, Kayode AU - Fashae K FAU - Vandenberg, Olivier AU - Vandenberg O FAU - Aarestrup, Frank M AU - Aarestrup FM FAU - Hendriksen, Rene S AU - Hendriksen RS LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20131015 PL - Italy TA - J Infect Dev Ctries JT - Journal of infection in developing countries JID - 101305410 RN - 0 (DNA, Bacterial) RN - 0 (Virulence Factors) SB - IM MH - Africa MH - Child MH - Child, Preschool MH - Cluster Analysis MH - DNA, Bacterial/chemistry/genetics MH - Democratic Republic of the Congo MH - Electrophoresis, Gel, Pulsed-Field MH - Female MH - *Genome, Bacterial MH - *Genomics MH - Genotype MH - Humans MH - Infant MH - Male MH - Microbial Sensitivity Tests MH - Molecular Sequence Data MH - Multilocus Sequence Typing MH - Nigeria MH - Phylogeny MH - Salmonella Infections/*microbiology MH - Salmonella typhimurium/drug effects/*genetics/isolation & purification MH - Virulence Factors/genetics EDAT- 2013/10/17 06:00 MHDA- 2014/05/07 06:00 CRDT- 2013/10/17 06:00 PHST- 2013/01/22 00:00 [received] PHST- 2013/04/30 00:00 [accepted] PHST- 2013/04/24 00:00 [revised] PHST- 2013/10/17 06:00 [entrez] PHST- 2013/10/17 06:00 [pubmed] PHST- 2014/05/07 06:00 [medline] AID - 10.3855/jidc.3328 [doi] PST - epublish SO - J Infect Dev Ctries. 2013 Oct 15;7(10):696-706. doi: 10.3855/jidc.3328.