Determination of Antimicrobial Resistance and the Impact of Imipenem + Cilastatin Synergy with Tetracycline in Pseudomonas aeruginosa Isolates from Sepsis
Abstract
:1. Introduction
2. Materials and Methods
2.1. Bacterial Strains and Culture Media
2.2. Kirby–Bauer Disc Diffusion Assay
2.3. MIC Assays and Synergy between Imipenem + Cilastatin and Tetracycline
2.4. Evaluation of Biofilm Total Biomass Using Crystal Violet Staining Assay
2.5. Biofilm Formation with Imipenem + Cilastatin and Tetracycline
2.6. DNA Extraction
2.7. Detection of Antibiotic Resistance Genes
2.8. Detection of Virulence Genes
3. Results and Discussion
3.1. Determination of Sensitivity to Antibiotics
3.2. MIC Assays and Synergy between Imipenem + Cilastatin and Tetracycline
3.3. Evaluation of Total Biofilm Biomass with and without Imipenem + Cilastatin and Tetracycline
3.4. Genotypic Characterization
3.4.1. Detection of Antibiotic-Resistant Genes
3.4.2. Detection of Virulence Genes
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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mg/L | TETRACYCLINE | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 4 | 8 | 16 | 32 | 64 | 128 | 256 | ||
IMI + CILAST | 1 | HHS12; HS17; HS18 | ||||||||
2 | HS7; HS17 | HS12; HS18 | HS2 | |||||||
4 | HS7 | HS17 | HS20 | HS2 | ||||||
8 | HS7 | HS17 | HS18 | HS12 | ||||||
16 | HS7 | HS18 | HS20 | HS2 | ||||||
32 | HS20 | |||||||||
64 |
Isolate | Aminoglycosides | Class D β-Lactamic | Class B MBLs | Class A Carbapenemases | Class A ESBLs | Other | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
aac(3)-III | aac(3)-II | blaOXA-48 | blaSPM | blaNDM | blaIMP | blaVIM | blaVIM2 | blaPER | blaKPC | blaTEM | oprD | |
HS1 | − | − | − | + | − | − | + | − | + | − | − | + |
HS2 | − | − | − | + | − | − | − | − | − | − | − | + |
HS3 | − | − | − | + | − | + | − | − | − | − | + | + |
HS4 | − | − | − | − | + | − | − | − | − | − | − | + |
HS5 | − | − | + | + | − | − | − | − | − | − | − | + |
HS6 | − | − | + | − | − | − | − | − | − | − | − | + |
HS7 | + | + | + | − | − | − | − | + | − | − | − | + |
HS8 | − | − | + | + | − | − | − | − | − | − | − | + |
HS9 | + | + | + | + | − | + | − | − | − | − | − | + |
HS10 | − | + | + | + | − | − | − | − | − | − | − | + |
HS11 | − | − | + | + | − | − | − | + | − | − | − | + |
HS14 | − | − | − | + | − | − | − | − | − | − | − | + |
HS15 | − | − | − | + | − | − | − | − | − | − | − | + |
HS16 | − | − | − | + | − | − | − | − | − | − | − | + |
HS17 | − | − | − | + | − | − | − | − | − | − | − | + |
HS18 | − | − | − | + | − | − | − | − | − | − | − | + |
HS19 | − | − | − | − | − | − | − | − | − | − | − | + |
HS20 | − | − | − | − | − | − | − | − | − | − | − | + |
HS21 | − | − | − | − | − | − | − | − | − | + | − | + |
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de Sousa, T.; Silva, C.; Alves, O.; Costa, E.; Igrejas, G.; Poeta, P.; Hébraud, M. Determination of Antimicrobial Resistance and the Impact of Imipenem + Cilastatin Synergy with Tetracycline in Pseudomonas aeruginosa Isolates from Sepsis. Microorganisms 2023, 11, 2687. https://doi.org/10.3390/microorganisms11112687
de Sousa T, Silva C, Alves O, Costa E, Igrejas G, Poeta P, Hébraud M. Determination of Antimicrobial Resistance and the Impact of Imipenem + Cilastatin Synergy with Tetracycline in Pseudomonas aeruginosa Isolates from Sepsis. Microorganisms. 2023; 11(11):2687. https://doi.org/10.3390/microorganisms11112687
Chicago/Turabian Stylede Sousa, Telma, Catarina Silva, Olimpia Alves, Eliana Costa, Gilberto Igrejas, Patricia Poeta, and Michel Hébraud. 2023. "Determination of Antimicrobial Resistance and the Impact of Imipenem + Cilastatin Synergy with Tetracycline in Pseudomonas aeruginosa Isolates from Sepsis" Microorganisms 11, no. 11: 2687. https://doi.org/10.3390/microorganisms11112687