Epidemiological and molecular analysis of decreased susceptibility to fluoroquinolone in Haemophilus influenzae
| Project/Area Number |
15H06521
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Bacteriology (including mycology)
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| Research Institution | Sapporo Medical University |
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Principal Investigator |
SATO TOYOTAKA 札幌医科大学, 医学部, 助教 (30756474)
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| Project Period (FY) |
2015-08-28 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | フルオロキノロン耐性 / インフルエンザ菌 |
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| Outline of Final Research Achievements |
Haemophilus influenzae is present as a commensal organism in upper respiratory tract and cause respiratory tract infections. Fluoroquinolone is one of the potent antimicrobial agent for the treatment. Although detail mechanical analysis of fluoroquinolone resistant development is important for prevent the emergence and spreading of fluoroquinolone resistant H. influenzae, that mechanism has been unclear. In this study, all H. influenzae clinical isolates exhibited susceptible to fluoroquinolone. However, 2 of the 64 (3.1%) isolates decreased susceptibility to fluoroquinolone with an amino acid substitution in QRDR. in vitro fluoroquinolone exposer experiment showed that 55.2% of H. influenzae clinical isolates decreased fluoroquinolone susceptibility and 34.4% was developed fluoroquinolone resistance. We also observed the significant association between decreased susceptibility to fluoroquinolone and ampicillin resistance.
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Report
(3 results)
Research Products
(9 results)
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[Journal Article] Tigecycline Nonsusceptibility Occurs Exclusively in Fluoroquinolone- Resistant Escherichia coli Clinical Isolates, Including the Major Multidrug-Resistant Lineages O25b:H4- ST131-H30R and O1-ST6482017
Author(s)
Sato T, Suzuki Y, Shiraishi T, Honda H, Shinagawa M, Yamamoto S, Ogasawara N, Takahashi H, Takahashi S, Tamura Y, Yokota SI
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Journal Title
Antimicrob Agents Chemother
Volume: 61
Issue: 2
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Pathogenic Lineage of mcr-Negative Colistin-Resistant Escherichia coli, Japan, 2008-20152016
Author(s)
Sato T, Fukuda A, Suzuki Y, Shiraishi T, Honda H, Shinagawa M, Yamamoto S, Ogasawara N, Usui M,Takahashi H, Takahashi S, Tamura Y, Yokota S
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Journal Title
Emerg. Infec. Dis
Volume: 22
Issue: 12
Pages: 2223-2224
DOI
NAID
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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