An α-Lipoic acid derivative, and anti-ROS agent, prevents the acquisition of multi-drug resistance in clinical isolates of Pseudomonas aeruginosa

Background: Drug resistance and virulence genes are two key factors for the colonization of Pseudomonas aeruginosa in settings with high antibiotic pressure, such as hospitals, and the development of hospital-acquired infections. Objectives: The objective of this study was to investigate the prevalence of drug resistance and virulence gene profiles in clinical isolates of P. aeruginosa in Ardabil, Iran. Methods: A total of 84 P. aeruginosa isolates were collected from clinical specimens of Ardabil hospitals and confirmed using laboratory standard tests. The disk diffusion method was used for antibiotic susceptibility testing and polymerase chain reaction (PCR) for the identification of P. aeruginosa virulence genes. Results: The highest and the lowest antibiotic resistance rates of P. aeruginosa strains were against ticarcillin-clavulanate (94%) and doripenem (33.3%), respectively. In addition, the frequency of multidrug-resistant (MDR) P. aeruginosa was 55.9%. The prevalence of virulence factor genes was as follows: algD 84.5%, lasB 86.9%, plcH 86.9%, plcN 86.9%, exoU 56%, exoS 51.2%, toxA 81%, nan1 13.1%, and pilB 33.3%. A significant association was observed between resistance to some antibiotics and the prevalence of virulence genes in P. aeruginosa. Conclusions: Our results revealed a high prevalence of antibiotic resistance, especially MDR, and virulence-associated genes in clinical isolates of P. aeruginosa in Ardabil hospitals. Owing to the low resistance rates against doripenem, gentamicin, and tobramycin, these antibiotics are recommended for the treatment of infections caused by highly resistant and virulent P. aeruginosa strains.

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An usual approach to treatment of a case of multidrug resistance Pseudomonas aeruginosa peritonitis: parenteral and intraperitoneal aminoglycosides and parenteral colistin

Infectious Disease Reports ◽

10.4081/idr.2012.e36 ◽

2012 ◽

Vol 4 (1) ◽

pp. 36 ◽

Cited By ~ 1

Author(s):

Ian May ◽

Maha Abu-Khdeir ◽

Roland Alexander Blackwood

Keyword(s):

Pseudomonas Aeruginosa ◽

Drug Resistance ◽

Intensive Care ◽

Multidrug Resistance ◽

Pleural Cavity ◽

Abdominal Cavity ◽

Multi Drug Resistance ◽

Clinical Settings ◽

Intravenous Antibiotics ◽

Polymyxin E

Infections caused by <em>Pseudomonas aeruginosa </em>are becoming more common and increasingly more difficult to treat due to the continued development of drug resistance. While sensitivity to colistin (polymyxin E) is well known, it is frequently avoided due to concerns of nephrotoxicity. Reported here is a case of a multi-drug resistance pseudomonal typhlitis, bacteremia and pleural cavity infection that required significant intensive care, and serial abdominal washouts. Intra-peritoneal tobramycin in combination with broad-spectrum intravenous antibiotics including colistin were used. Several instillations of tobramycin into the abdominal cavity along with concomitant IV administration of colistin, ceftazidime and tobramycin and<em> per os</em> colistin, tobramycin and nystatin resulted in the clearance of the pseudomonal infection without any evidence of toxicity from the treatment. Intra-abdominal tobramycin with parenteral colistin therapy can be used in complicated clinical settings with appropriate nephroprotection.

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Detection of high levels of methicillin and multi-drug resistance among clinical isolates of Staphylococcus aureus

African Journal of Microbiology Research ◽

10.5897/ajmr12.2333 ◽

2013 ◽

Vol 7 (16) ◽

pp. 1598-1604 ◽

Cited By ~ 1

Author(s):

Moneer El Karamany Iman ◽

Musa Ibrahim Yasser ◽

Megahed Abouwarda Ahmed ◽

Mohammed Essam Tamer ◽

Ali Amin Magdy

Keyword(s):

Staphylococcus Aureus ◽

Drug Resistance ◽

Clinical Isolates ◽

Multi Drug Resistance

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Drug Resistance and Biofilm Production among Pseudomonas aeruginosa Clinical Isolates in a Tertiary Care Hospital of Nepal

Nepal Medical College Journal ◽

10.3126/nmcj.v21i2.25109 ◽

2019 ◽

Vol 21 (2) ◽

pp. 110-116

Author(s):

Rajani Shrestha ◽

N. Nayak ◽

D.R. Bhatta ◽

D. Hamal ◽

S.H. Subramanya ◽

...

Keyword(s):

Pseudomonas Aeruginosa ◽

Drug Resistance ◽

Biofilm Formation ◽

Tertiary Care ◽

Clinical Problem ◽

Multidrug Resistant ◽

Clinical Isolates ◽

Diffusion Method ◽

Care Hospital ◽

Microbiological Methods

Clinical isolates of Pseudomonas aeruginosa often exhibit multidrug resistance due to their inherent ability to form biofilms. Drug resistance in Ps. aeruginosa is a major clinical problem, especially in the management of patients with nosocomial infections and those admitted to ICUs with indwelling medical devices. To evaluate the biofilm forming abilities of the clinical isolates of Ps. aeruginosa and to correlate biofilm formation with antibiotic resistance. A total of 90 consecutive isolates of Ps. aeruginosa obtained from various specimens collected from patients visiting the Manipal Teaching Hospital, Pokhara, Nepal between January 2018 - October 2018 were studied. Isolates were identified by standard microbiological methods. Antibiotic susceptibility testing was performed by Kirby-Bauer disc diffusion method. All the isolates were tested for their biofilm forming abilities by employing the tissue culture plate assay. Of the 90 Ps. aeruginosa isolates, maximum i.e 42 (46.6%) were from patients in the age group of > 50 years. Majority (30; 33.3%) of the isolates were obtained from sputum samples. However, percentage isolation from other specimens like urine, endotracheal tube (ETT), pus, eye specimens and blood were 18.9%, 16.7%, 16.7%, 7.8% and 6.7% respectively. All the isolates were sensitive to polymixin B and colistin, 91.1% of the organisms were sensitive to imipenem, and more than 80% to aminoglycosides (80% to gentamicin, 83.3% to amikacin). A total of 29 (32.2%) organisms were biofilm producers. Maximum numbers of biofilm producing strains were obtained from ETT (8 of 15; 53.3%), pus (8 of 15; 53.3%) and blood (2 of 6; 33.3%) i.e from all invasive sites. None of the isolates from noninvasive specimens such as conjunctival swabs were biofilm positive. Significantly higher numbers of biofilm producers (23 of 29; 79.3%) were found to be multidrug resistant as compared to non-biofilm (6 of 61; 9.8%) producers (p=0.000). Ps. aeruginosa colonization leading to biofilm formation in deep seated tissues and on indwelling devices is a therapeutic challenge as majority of the isolates would be recalcitrant to commonly used antipseudomonal drugs. Effective monitoring of drug resistance patterns in all Pseudomonas clinical isolates should be a prerequisite for successful patient management.

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Multi drug resistance in strong biofilm forming clinical isolates of Staphylococcus epidermidis

Brazilian Journal of Microbiology ◽

10.1590/s1517-83822014005000042 ◽

2014 ◽

Vol 45 (2) ◽

pp. 539-544 ◽

Cited By ~ 18

Author(s):

Gulcan Sahal ◽

Isil Seyis Bilkay

Keyword(s):

Drug Resistance ◽

Staphylococcus Epidermidis ◽

Clinical Isolates ◽

Multi Drug Resistance

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Multidrug and Extensive Drug Resistance in Pseudomonas aeruginosa Clinical Isolates from a Portuguese Central Hospital: 10-Year Survey

Microbial Drug Resistance ◽

10.1089/mdr.2014.0137 ◽

2015 ◽

Vol 21 (2) ◽

pp. 194-200 ◽

Cited By ~ 6

Author(s):

Sónia Gonçalves Pereira ◽

Margarida Marques ◽

João Pereira ◽

Olga Cardoso

Keyword(s):

Pseudomonas Aeruginosa ◽

Drug Resistance ◽

Clinical Isolates ◽

Central Hospital ◽

Extensive Drug Resistance

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The bactericidal activity of Magnetic water on Multi Drug Resistance [ MDR] Pseudomonas aeruginosa Resistance Colistin from clinical and environmental sources and effect on Biofilm

10.24897/acn.64.68.31 ◽

2017 ◽

Keyword(s):

Pseudomonas Aeruginosa ◽

Drug Resistance ◽

Bactericidal Activity ◽

Multi Drug Resistance ◽

Magnetic Water

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Identification of floR Variants Associated With a Novel Tn4371-Like Integrative and Conjugative Element in Clinical Pseudomonas aeruginosa Isolates

Frontiers in Cellular and Infection Microbiology ◽

10.3389/fcimb.2021.685068 ◽

2021 ◽

Vol 11 ◽

Author(s):

Changrui Qian ◽

Hongmao Liu ◽

Jiawei Cao ◽

Yongan Ji ◽

Wei Lu ◽

...

Keyword(s):

Pseudomonas Aeruginosa ◽

Drug Resistance ◽

Respiratory Diseases ◽

Essential Role ◽

Multi Drug Resistance ◽

Clinical Samples ◽

Integrative And Conjugative Elements ◽

Intestinal Infections ◽

Clinical Pathogens ◽

Integrative And Conjugative Element

Florfenicol is widely used to control respiratory diseases and intestinal infections in food animals. However, there are increasing reports about florfenicol resistance of various clinical pathogens. floR is a key resistance gene that mediates resistance to florfenicol and could spread among different bacteria. Here, we investigated the prevalence of floR in 430 Pseudomonas aeruginosa isolates from human clinical samples and identified three types of floR genes (designated floR, floR-T1 and floR-T2) in these isolates, with floR-T1 the most prevalent (5.3%, 23/430). FloR-T2 was a novel floR variant identified in this study, and exhibited less identity with other FloR proteins than FloRv. Moreover, floR-T1 and floR-T2 identified in P. aeruginosa strain TL1285 were functionally active and located on multi-drug resistance region of a novel incomplete Tn4371-like integrative and conjugative elements (ICE) in the chromosome. The expression of the two floR variants could be induced by florfenicol or chloramphenicol. These results indicated that the two floR variants played an essential role in the host’s resistance to amphenicol and the spreading of these floR variants might be related with the Tn4371 family ICE.

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