Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Pivot Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Target Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Query: UMLS:C0014118 (
endocarditis
)
15,629
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
In this study, the in vivo impact of the MexAB-OprM efflux system on antipseudomonal beta-lactam efficacy was investigated. The respective activities of human simulated regimens of ticarcillin (TIC), piperacillin/tazobactam (PIP/
TAZ
) and ceftazidime (CFZ) on two isogenic mutants of Pseudomonas aeruginosa PAO1, namely PAO4098E overexpressing MexAB-OprM and PAO4098ET which is OprM-depleted, were evaluated in an experimental rabbit
endocarditis
model. The following human daily doses by intermittent administration or continuous infusion were simulated: 15 g and 18 g for TIC; 12 g and 16 g for PIP/
TAZ
; and 3g and 6g for CFZ. TIC, PIP/
TAZ
and CFZ exhibited minimum inhibitory concentrations of 64, 8 and 2 microg/mL, respectively, against PAO4098E and 0.5, 0.5 and 1 microg/mL against PAO4098ET. Against PAO4098E, only the high-dose regimens of CFZ were effective, with the most significant effect being achieved by continuous infusion. In contrast, all the tested regimens were effective against PAO4098ET. In the most difficult-to-treat infections due to P. aeruginosa exhibiting the efflux system MexAB-OprM, CFZ at high doses and by continuous infusion should be preferred to TIC and PIP/
TAZ
.
...
PMID:In vivo impact of the MexAB-OprM efflux system on beta-lactam efficacy in an experimental model of Pseudomonas aeruginosa infection. 1915 1
