Characterization of paired mucoid/non-mucoid Pseudomonas aeruginosa isolates from Danish cystic fibrosis patients: antibiotic resistance, beta-lactamase activity and RiboPrinting.

O Ciofu; V Fussing; N Bagge; Christian Koch; N Høiby

Characterization of paired mucoid/non-mucoid Pseudomonas aeruginosa isolates from Danish cystic fibrosis patients: antibiotic resistance, beta-lactamase activity and RiboPrinting.

O Ciofu, V Fussing, N Bagge, Christian Koch, N Høiby

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

81 Citationer (Scopus)

Abstract

Udgivelsesdato: 2001-Sep

Originalsprog	Engelsk
Tidsskrift	Journal of Antimicrobial Chemotherapy
Vol/bind	48
Udgave nummer	3
Sider (fra-til)	391-6
Antal sider	5
ISSN	0305-7453
Status	Udgivet - 2001

Bibliografisk note

Keywords: Adolescent; Adult; Anti-Bacterial Agents; Cystic Fibrosis; Denmark; Drug Resistance, Bacterial; Female; Glycosaminoglycans; Humans; Male; Membrane Proteins; Microbial Sensitivity Tests; Phenotype; Pseudomonas aeruginosa; Ribotyping; beta-Lactam Resistance; beta-Lactamases

Citationsformater

Characterization of paired mucoid/non-mucoid Pseudomonas aeruginosa isolates from Danish cystic fibrosis patients: antibiotic resistance, beta-lactamase activity and RiboPrinting. / Ciofu, O; Fussing, V; Bagge, N et al.
I: Journal of Antimicrobial Chemotherapy, Bind 48, Nr. 3, 2001, s. 391-6.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

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title = "Characterization of paired mucoid/non-mucoid Pseudomonas aeruginosa isolates from Danish cystic fibrosis patients: antibiotic resistance, beta-lactamase activity and RiboPrinting.",

abstract = "The purpose of this study was to characterize 42 paired mucoid and non-mucoid Danish cystic fibrosis (CF) Pseudomonas aeruginosa isolates collected in 1997, by RiboPrinting, antibiotic susceptibility and beta-lactamase activity. Eight P. aeruginosa isolates collected before 1991 were included for comparison. Eighteen of the 42 paired mucoid and non-mucoid isolates showed the same ribotype; the remaining 24 belonged to different ribogroups. Mucoid isolates showed higher susceptibility to antibiotics and lower beta-lactamase activity compared with non-mucoid isolates. Significant differences (P < or = 0.01) between mucoid and non-mucoid isolates were found for the meropenem and colistin MICs for the isolates with the same ribotype, and for the MICs of ceftazidime, piperacillin, aztreonam, meropenem, tobramycin, ciprofloxacin and in the basal levels of beta-lactamase for the paired isolates belonging to different ribogroups. A dominant ribotype 73-S2 with hyperinducible beta-lactamase production and significantly higher MICs of piperacillin, meropenem and tobramycin compared with the other major ribotypes (73-S1, 207-S3 and 227-S8) was present among the 84 CF isolates. The isolates collected before 1991 had an antibiotic susceptibility pattern similar to the 1997 isolates. Despite prolonged and intensive antibiotic treatment, susceptible mucoid isolates were isolated from the CF sputum, possibly because these bacteria are protected from the selective pressure of antibiotics by the resistant non-mucoid isolates co-existing in the biofilm in the lungs of CF patients.",

author = "O Ciofu and V Fussing and N Bagge and Christian Koch and N H{\o}iby",

note = "Keywords: Adolescent; Adult; Anti-Bacterial Agents; Cystic Fibrosis; Denmark; Drug Resistance, Bacterial; Female; Glycosaminoglycans; Humans; Male; Membrane Proteins; Microbial Sensitivity Tests; Phenotype; Pseudomonas aeruginosa; Ribotyping; beta-Lactam Resistance; beta-Lactamases",

year = "2001",

language = "English",

volume = "48",

pages = "391--6",

journal = "Journal of Antimicrobial Chemotherapy",

issn = "0305-7453",

publisher = "Oxford University Press",

number = "3",

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TY - JOUR

T1 - Characterization of paired mucoid/non-mucoid Pseudomonas aeruginosa isolates from Danish cystic fibrosis patients: antibiotic resistance, beta-lactamase activity and RiboPrinting.

AU - Ciofu, O

AU - Fussing, V

AU - Bagge, N

AU - Koch, Christian

AU - Høiby, N

N1 - Keywords: Adolescent; Adult; Anti-Bacterial Agents; Cystic Fibrosis; Denmark; Drug Resistance, Bacterial; Female; Glycosaminoglycans; Humans; Male; Membrane Proteins; Microbial Sensitivity Tests; Phenotype; Pseudomonas aeruginosa; Ribotyping; beta-Lactam Resistance; beta-Lactamases

PY - 2001

Y1 - 2001

N2 - The purpose of this study was to characterize 42 paired mucoid and non-mucoid Danish cystic fibrosis (CF) Pseudomonas aeruginosa isolates collected in 1997, by RiboPrinting, antibiotic susceptibility and beta-lactamase activity. Eight P. aeruginosa isolates collected before 1991 were included for comparison. Eighteen of the 42 paired mucoid and non-mucoid isolates showed the same ribotype; the remaining 24 belonged to different ribogroups. Mucoid isolates showed higher susceptibility to antibiotics and lower beta-lactamase activity compared with non-mucoid isolates. Significant differences (P < or = 0.01) between mucoid and non-mucoid isolates were found for the meropenem and colistin MICs for the isolates with the same ribotype, and for the MICs of ceftazidime, piperacillin, aztreonam, meropenem, tobramycin, ciprofloxacin and in the basal levels of beta-lactamase for the paired isolates belonging to different ribogroups. A dominant ribotype 73-S2 with hyperinducible beta-lactamase production and significantly higher MICs of piperacillin, meropenem and tobramycin compared with the other major ribotypes (73-S1, 207-S3 and 227-S8) was present among the 84 CF isolates. The isolates collected before 1991 had an antibiotic susceptibility pattern similar to the 1997 isolates. Despite prolonged and intensive antibiotic treatment, susceptible mucoid isolates were isolated from the CF sputum, possibly because these bacteria are protected from the selective pressure of antibiotics by the resistant non-mucoid isolates co-existing in the biofilm in the lungs of CF patients.

AB - The purpose of this study was to characterize 42 paired mucoid and non-mucoid Danish cystic fibrosis (CF) Pseudomonas aeruginosa isolates collected in 1997, by RiboPrinting, antibiotic susceptibility and beta-lactamase activity. Eight P. aeruginosa isolates collected before 1991 were included for comparison. Eighteen of the 42 paired mucoid and non-mucoid isolates showed the same ribotype; the remaining 24 belonged to different ribogroups. Mucoid isolates showed higher susceptibility to antibiotics and lower beta-lactamase activity compared with non-mucoid isolates. Significant differences (P < or = 0.01) between mucoid and non-mucoid isolates were found for the meropenem and colistin MICs for the isolates with the same ribotype, and for the MICs of ceftazidime, piperacillin, aztreonam, meropenem, tobramycin, ciprofloxacin and in the basal levels of beta-lactamase for the paired isolates belonging to different ribogroups. A dominant ribotype 73-S2 with hyperinducible beta-lactamase production and significantly higher MICs of piperacillin, meropenem and tobramycin compared with the other major ribotypes (73-S1, 207-S3 and 227-S8) was present among the 84 CF isolates. The isolates collected before 1991 had an antibiotic susceptibility pattern similar to the 1997 isolates. Despite prolonged and intensive antibiotic treatment, susceptible mucoid isolates were isolated from the CF sputum, possibly because these bacteria are protected from the selective pressure of antibiotics by the resistant non-mucoid isolates co-existing in the biofilm in the lungs of CF patients.

M3 - Journal article

C2 - 11533004

SN - 0305-7453

VL - 48

SP - 391

EP - 396

JO - Journal of Antimicrobial Chemotherapy

JF - Journal of Antimicrobial Chemotherapy

IS - 3

ER -