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Elizabethkingia.spp (Bacterial strains collection (in vitro (Sequencing -…
Elizabethkingia.spp
Molecular typing
RAPD+Capilary Electrophoresis system
Bacterial strains collection
in vitro
Sequencing - mutation
Survival capability assay
MIC determinations - Antimicrobial susceptibility
Gene-deletion
Gene-overexpression
PCR - mutation
Pulsed field gel electrophoresis - typing
要跟其他實驗室合作,才走這個方向
Proteomics
Metabolomics
in vivo
Model of Mouse Infection
Elizabethkingia
identification
MALDI-TOF
AST
Vitek 2 and Sensititre discrepancy
broth micro dilution
(gold standard confirm)
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Levofloxacin
Cirofloxacin
Tigecycline
Tigecycline
resistance mechanism
Efflux pump?
Efflux pump inhibitor(EPI)
PAbetaN
MIC>512 後續不易執行
NMP
初步結果加NMP可使MIC下降
2 more items...
Antimicrobial resistance
Known carbapenme resistance gene
ESBL
CME<已建立方法篩選>
GOB,BlaB<已建立方法篩選>
Quinolone resistance
Alterations in target enzymes-QRDR
Levofloxacin / Ciprofloxacin
phenomenon
Recent reference
QRDR,gyrA ParC
antimicrobial susceptibilty
susceptible
resistant
intermediate
E.spp
DNA gyrase, subunit A,(type II topoisomerase)
PCR/Sequcing<請煜瑄完成後續>
Result analysis<待基龍米克斯定序結果分析>
合成Primer(已完成)
這些抗藥菌株基因分型的結果
Mismatch Amplification Mutation Assays (MAMA) for Rapid Detection of gyrA and parC Mutations
gyrB
DNA gyrase, subunit B (type II topoisomerase)
5 more items...
ParC(DNA topoisomerase IV subunit A)
合成Primer(已完成),共有二組。一組for E.anohpelis and e.miricola,一組for E.menigoseptica 找不到更conserved sequence
初步發現,其ParC gene no mutation in QRDR region such as AA site 78 80 84
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ParE DNA topoisomerase subunit B
ParE(DNA topoisomerase IV subunit B)
Novel mutations were found at five different codons and comprised Glu453-Gly His461-Tyr), Ala498-Thr , Val512-Gly, and Ser518-Cys.
we found one change in the amino acid sequence of GyrB of strain 197 (Ser-494 to Thr), and a Gln substitution was observed in ParE Pro-424 of strain 112.
賣點:目前E.spp未有相關文獻討論
Plasmid-mediated quinolone resistance
Altered drug permeation-PUMP
2007年重新分類
E.anophelis
E.miricola
E.menigoseptica
gyrA
1.須找到兩株基因型很接近的菌株
2.一株EPI有反應/一株無反應
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2018義大發在Journal of Clinical Medicine和韓國發在2019 EID都發現在E.species感染E.anophelis佔的比例其實原比想像中來的高