Lateral flow immunoassay. - urology.stanford.edu · 000 New and developing diagnostic technologies...

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Transcript of Lateral flow immunoassay. - urology.stanford.edu · 000 New and developing diagnostic technologies...

Screening assays

Lateral flow immunoassay.

Currentpract ice

Newtechnologies

Urinesample

obtained

1–2 h 24 h 48 h

Flow cytometry.

insitu Quick

Adapting clinical molecular platforms

MALDI–TOF mass spectrometry.

Fluorescence in situ hybridization.

Multiplex PCR.

Biosensors, microfluidics, and lab on a chip technology.

UNI

Cur

rent

out

put (

nA)

EB EC PM PA EF NC 0 0.25 0.5 1 2 40

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000C. koseri ciprofloxacin MIC ≤ 0.25 (sensitive)Ca

Ba

A

Bb Bc Bd

Cb E. coli ciprofloxacin MIC > 4 (resistant)

UNI

Cur

rent

out

put (

nA)

EB EC PM PA EF NC 0 0.25 0.5 1 2 40

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

UNI EB EC PM

16S rRNA probes

Ciprofloxacin concentration (μg/ml)

PA EF NC PC

0 0.25 0.5 1 2 4 NC PC

16S rRNAcapture–detectorprobes complex

Recognitionelement

PathogenID

MIC

EnterobacteriaceaeEscherichia coli Proteus mirabilis P. aeruginosaEnterococcus faecalis

Citrobacter koseri Enterobacteriacea

E.coli

et al.Trends Pharmacol. Sci.32et al.Eur. Urol. Focus

Drugtrials

Viabilityindicator Bacterial

solution

Spacer plugCarrierfluid

0.2 mg/l trials 0.0 mg/l trials

Spacer seperatesdifferent drug trials

Ab

C

Fluo

resc

ence

incr

ease

(au)

0

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100

0.0 0.0

CFX concentration (mg/l)0.2 1.0 2.0 4.0 8.0 24.0

10

47

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20 16 30 48 5274 43 75

Bb

AD

P ph

oton

cou

nt

Time (ms)

0

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2,000

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0 20 40 60 80 100 120

Droplet generation

Droplet detectionBacteriagrowth

Indicator andantibiotic inlet

20 μm

2mm

InletOil inlet Droplet incubationAa Ba

100 μm

100 μm

Antibiotics

A A′

A′

Antibiotics

Bacterial cells onthe bottom of the channel areimmobilizedby agarose

Microfluidicchannel Time lapse

single-cell imaging

Plasticchip

Film

Diff usion

erial are

eose

Staphylococcus aureus n et al. Lab Chip 8

et al.

et al.Sci. Transl Med.6

7

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1 2

Acknowle d geme nt s

Aut hor cont r ibut ions

Comp e t ing int e re s t s s ta t e ment

Author biographies

Competing interests statement

Permission information

et al. Trends Pharmacol. Sci.32

et al.Eur. Urol. Focus

et al.Lab Chip8et al.

et al.Sci. Transl Med.6

Subject ontology terms

ToC blurb

000 New and developing diagnostic technologies for urinary tract infectionsMichael Davenport, Kathleen E. Mach, Linda M. Dairiki ShortliƑe, Niaz Banaei, Tza-Huei Wang and Joseph C. Liao

ONLINE O NLY