AUTHOR=Eger Elias , Heiden Stefan E. , Korolew Katja , Bayingana Claude , Ndoli Jules M. , Sendegeya Augustin , Gahutu Jean Bosco , Kurz Mathis S. E. , Mockenhaupt Frank P. , Müller Julia , Simm Stefan , Schaufler Katharina 

TITLE=Circulation of Extended-Spectrum Beta-Lactamase-Producing Escherichia coli of Pandemic Sequence Types 131, 648, and 410 Among Hospitalized Patients, Caregivers, and the Community in Rwanda

JOURNAL=Frontiers in Microbiology

VOLUME=12

YEAR=2021

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2021.662575

DOI=10.3389/fmicb.2021.662575

ISSN=1664-302X

ABSTRACT=<p>Multi-drug resistant (MDR), gram-negative <italic>Enterobacteriaceae</italic>, such as <italic>Escherichia coli</italic> (<italic>E. coli</italic>) limit therapeutic options and increase morbidity, mortality, and treatment costs worldwide. They pose a serious burden on healthcare systems, especially in developing countries like Rwanda. Several studies have shown the effects caused by the global spread of extended-spectrum beta-lactamase (ESBL)-producing <italic>E. coli</italic>. However, limited data is available on transmission dynamics of these pathogens and the mobile elements they carry in the context of clinical and community locations in Sub-Saharan Africa. Here, we examined 120 ESBL-producing <italic>E. coli</italic> strains from patients hospitalized in the University Teaching Hospital of Butare (Rwanda), their attending caregivers as well as associated community members and livestock. Based on whole-genome analysis, the genetic diversification and phylogenetics were assessed. Moreover, the content of carried plasmids was characterized and investigated for putative transmission among strains, and for their potential role as drivers for the spread of antibiotic resistance. We show that among the 30 different sequence types (ST) detected were the pandemic clonal lineages ST131, ST648 and ST410, which combine high-level antimicrobial resistance with virulence. In addition to the frequently found resistance genes <italic>bla</italic><sub><italic>CTX–M–15</italic></sub>, <italic>tet</italic>(34), and <italic>aph(6)-Id</italic>, we identified <italic>csg</italic> genes, which are required for curli fiber synthesis and thus biofilm formation. Numerous strains harbored multiple virulence-associated genes (VAGs) including <italic>pap</italic> (P fimbriae adhesion cluster), <italic>fim</italic> (type I fimbriae) and <italic>chu</italic> (Chu heme uptake system). Furthermore, we found phylogenetic relationships among strains from patients and their caregivers or related community members and animals, which indicates transmission of pathogens. Also, we demonstrated the presence and potential transfer of identical/similar ESBL-plasmids in different strains from the Rwandan setting and when compared to an external plasmid. This study highlights the circulation of clinically relevant, pathogenic ESBL-producing <italic>E. coli</italic> among patients, caregivers and the community in Rwanda. Combining antimicrobial resistance with virulence in addition to the putative exchange of mobile genetic elements among bacterial pathogens poses a significant risk around the world.</p>