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Previous studies on the antimicrobial activity of cold atmospheric pressure argon plasma showed varying effects against mecA<sup>+</sup> or mecA<sup>-</sup>Staphylococcus aureus strains. This observation may have important clinical and epidemiological implications. Here, the antibacterial activity of argon plasma was investigated against 78 genetically different S. aureus strains, stratified by mecA, luk-P, agr1-4, or the cell wall capsule polysaccharide types 5 and 8. kINPen09® served as the plasma source for all experiments. On agar plates, mecA<sup>+</sup>luk-P<sup>-</sup>S. aureus strains showed a decreased susceptibility against plasma compared to other S. aureus strains. This study underlines the high complexity of microbial defence against antimicrobial treatment and confirms a previously reported strain-dependent susceptibility of S. aureus to plasma treatment.
Multidrug-resistant gram-negative (MRGN) bacteria are a serious threat to global health. We used genomics tostudy MRGN obtained from houseflies in a tertiary Rwandan hospital. Our analysis revealed a high abundance ofdifferent MRGN includingE. colipathogenic lineage ST131 suggesting the important role of flies in disseminatinghighly virulent pathogens in clinical settings and beyond