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Specific type IV pili groups in clinical isolates of Pseudomonas aeruginosa
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The relationships between specific type IV pili (TFP) groups and antibiotic resistance, biofilm formation, and bacterial motility were determined in 190 Pseudomonas aeruginosa clinical isolates. While motility and biofilm formation were determined by phenotypic assays, the presence of TFP was determined by PCR assay and antibiotic susceptibility by disk diffusion. The results showed a high ability to form biofilm (97.4%), multidrug resistance (44.7%), and the presence of a high number of motile isolates. We also found an association between strong biofilm production and multidrug resistance. Furthermore, TFP group III was associated with strong biofilm production. In contrast, the isolates with TFP group II and those without any TFP were associated with non-strong biofilm
production. Regarding motility, TFP group II was associated with
higher percentages of swarming, swimming, and twitching, while
TFP group I showed lower percentages of swarming and twitching,
and TFP group III showed lower levels of swarming and swimming.
In conclusion, these findings highlight the differences in P.
aeruginosa phenotypes related to the presence of specific TFP
groups and their potential implications in clinical settings.
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HORNA, Gertrudis, et al. Specific type IV pili groups in clinical isolates of Pseudomonas aeruginosa. International Microbiology. 2019. Vol. 22, num. 1, pags. 131-141. ISSN 1139-6709. [consulted: 16 of August of 2026]. Available at: https://hdl.handle.net/2445/135481