Abstract
Pathogens of the Burkholderia genus are causing diseases in a diverse variety of hosts. After the discovery of T6SS, it was found to play a pivotal role in virulence and other pathogenicity factors in different pathogenic Burkholderia species. For this study, three strains of Burkholderia cenocepacia were selected from different ecological niches; J2315 from humans, MC0-3 from the rhizosphere of maize, and YG-3 from the Populus tree. The sequenced genomes were retrieved from PATRIC. It was found that B. cenocepacia J2315 and MC0-3 strains had only 1 cluster of T6SS in their genomes while the YG-3 strain had 3 clusters. The circular genomic map and phylogenetic tree suggested major differences in T6SS clusters 2 and 3 of the YG-3 strain from other clusters. From the results obtained in the study and reviewing the literature, it was concluded that all 3 strains harbor T6SS-1 type cluster that is involved in causing virulence in eukaryotic organisms and several bacterial species. This factor of causing virulence in the bacteria species might be helpful for B. cenocepacia strains J2315, MC0-3 and YG-3 in survival and niche adaptation.
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